forked from OSchip/llvm-project
Split fast-basictest.ll according to passes responsible for optimizations
- add logically missing test cases. - add appropriate comments. - add appropriate TODO's. See initial motivation in https://reviews.llvm.org/D117302 Differential Revision: https://reviews.llvm.org/D118769
This commit is contained in:
Daniil Kovalev
Andrew Savonichev
parent
cc306740cc
commit
8471c537d5
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@ -0,0 +1,701 @@
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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;
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; Test numbering remains continuous across:
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; - InstCombine/fast-basictest.ll
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; - PhaseOrdering/fast-basictest.ll
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; - PhaseOrdering/fast-reassociate-gvn.ll
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; - Reassociate/fast-basictest.ll
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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; With reassociation, constant folding can eliminate the 12 and -12 constants.
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define float @test1(float %arg) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float [[ARG:%.*]]
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%t1 = fsub fast float -1.200000e+01, %arg
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%t2 = fadd fast float %t1, 1.200000e+01
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ret float %t2
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}
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; Check again using the minimal subset of FMF.
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; Both 'reassoc' and 'nsz' are required.
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define float @test1_minimal(float %arg) {
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; CHECK-LABEL: @test1_minimal(
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; CHECK-NEXT: [[TMP1:%.*]] = fneg reassoc nsz float [[ARG:%.*]]
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%t1 = fsub reassoc nsz float -1.200000e+01, %arg
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%t2 = fadd reassoc nsz float %t1, 1.200000e+01
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ret float %t2
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}
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; Verify the fold is not done with only 'reassoc' ('nsz' is required).
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define float @test1_reassoc(float %arg) {
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; CHECK-LABEL: @test1_reassoc(
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; CHECK-NEXT: [[T1:%.*]] = fsub reassoc float -1.200000e+01, [[ARG:%.*]]
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; CHECK-NEXT: [[T2:%.*]] = fadd reassoc float [[T1]], 1.200000e+01
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; CHECK-NEXT: ret float [[T2]]
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;
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%t1 = fsub reassoc float -1.200000e+01, %arg
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%t2 = fadd reassoc float %t1, 1.200000e+01
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ret float %t2
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}
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; ((a + (-3)) + b) + 3 -> a + b
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; That only works with both instcombine and reassociate passes enabled.
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; Check that instcombine is not enough.
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define float @test2(float %reg109, float %reg1111) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[REG115:%.*]] = fadd fast float [[REG109:%.*]], -3.000000e+01
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; CHECK-NEXT: [[REG116:%.*]] = fadd fast float [[REG115]], [[REG1111:%.*]]
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; CHECK-NEXT: [[REG117:%.*]] = fadd fast float [[REG116]], 3.000000e+01
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; CHECK-NEXT: ret float [[REG117]]
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;
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%reg115 = fadd fast float %reg109, -3.000000e+01
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%reg116 = fadd fast float %reg115, %reg1111
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%reg117 = fadd fast float %reg116, 3.000000e+01
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ret float %reg117
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}
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define float @test2_no_FMF(float %reg109, float %reg1111) {
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; CHECK-LABEL: @test2_no_FMF(
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; CHECK-NEXT: [[REG115:%.*]] = fadd float [[REG109:%.*]], -3.000000e+01
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; CHECK-NEXT: [[REG116:%.*]] = fadd float [[REG115]], [[REG1111:%.*]]
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; CHECK-NEXT: [[REG117:%.*]] = fadd float [[REG116]], 3.000000e+01
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; CHECK-NEXT: ret float [[REG117]]
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;
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%reg115 = fadd float %reg109, -3.000000e+01
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%reg116 = fadd float %reg115, %reg1111
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%reg117 = fadd float %reg116, 3.000000e+01
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ret float %reg117
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}
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define float @test2_reassoc(float %reg109, float %reg1111) {
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; CHECK-LABEL: @test2_reassoc(
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; CHECK-NEXT: [[REG115:%.*]] = fadd reassoc float [[REG109:%.*]], -3.000000e+01
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; CHECK-NEXT: [[REG116:%.*]] = fadd reassoc float [[REG115]], [[REG1111:%.*]]
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; CHECK-NEXT: [[REG117:%.*]] = fadd reassoc float [[REG116]], 3.000000e+01
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; CHECK-NEXT: ret float [[REG117]]
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;
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%reg115 = fadd reassoc float %reg109, -3.000000e+01
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%reg116 = fadd reassoc float %reg115, %reg1111
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%reg117 = fadd reassoc float %reg116, 3.000000e+01
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ret float %reg117
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}
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; (-X)*Y + Z -> Z-X*Y
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define float @test7(float %X, float %Y, float %Z) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fsub fast float [[Z:%.*]], [[TMP1]]
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; CHECK-NEXT: ret float [[C]]
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;
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%A = fsub fast float 0.0, %X
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%B = fmul fast float %A, %Y
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%C = fadd fast float %B, %Z
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ret float %C
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}
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define float @test7_unary_fneg(float %X, float %Y, float %Z) {
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; CHECK-LABEL: @test7_unary_fneg(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fsub fast float [[Z:%.*]], [[TMP1]]
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; CHECK-NEXT: ret float [[C]]
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;
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%A = fneg fast float %X
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%B = fmul fast float %A, %Y
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%C = fadd fast float %B, %Z
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ret float %C
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}
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define float @test7_reassoc_nsz(float %X, float %Y, float %Z) {
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; CHECK-LABEL: @test7_reassoc_nsz(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fsub reassoc nsz float [[Z:%.*]], [[TMP1]]
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; CHECK-NEXT: ret float [[C]]
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;
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%A = fsub reassoc nsz float 0.0, %X
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%B = fmul reassoc nsz float %A, %Y
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%C = fadd reassoc nsz float %B, %Z
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ret float %C
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}
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; Verify that fold is not done only with 'reassoc' ('nsz' is required)
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define float @test7_reassoc(float %X, float %Y, float %Z) {
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; CHECK-LABEL: @test7_reassoc(
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; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 0.000000e+00, [[X:%.*]]
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; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[A]], [[Y:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fadd reassoc float [[B]], [[Z:%.*]]
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; CHECK-NEXT: ret float [[C]]
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;
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%A = fsub reassoc float 0.0, %X
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%B = fmul reassoc float %A, %Y
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%C = fadd reassoc float %B, %Z
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ret float %C
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}
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define float @test8(float %X) {
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; CHECK-LABEL: @test8(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], 9.400000e+01
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%Y = fmul fast float %X, 4.700000e+01
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%Z = fadd fast float %Y, %Y
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ret float %Z
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}
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; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
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define float @test8_reassoc_nsz(float %X) {
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; CHECK-LABEL: @test8_reassoc_nsz(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], 9.400000e+01
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%Y = fmul reassoc nsz float %X, 4.700000e+01
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%Z = fadd reassoc nsz float %Y, %Y
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ret float %Z
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}
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; TODO: This doesn't require 'nsz'. It should fold to X * 94.0
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define float @test8_reassoc(float %X) {
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; CHECK-LABEL: @test8_reassoc(
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; CHECK-NEXT: [[Y:%.*]] = fmul reassoc float [[X:%.*]], 4.700000e+01
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; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[Y]]
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; CHECK-NEXT: ret float [[Z]]
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;
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%Y = fmul reassoc float %X, 4.700000e+01
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%Z = fadd reassoc float %Y, %Y
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ret float %Z
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}
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; Side note: (x + x + x) and (3*x) each have only a single rounding. So
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; transforming x+x+x to 3*x is always safe, even without any FMF.
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; To avoid that special-case, we have the addition of 'x' four times, here.
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define float @test9(float %X) {
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; CHECK-LABEL: @test9(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], 4.000000e+00
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%Y = fadd fast float %X ,%X
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%Z = fadd fast float %Y, %X
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%W = fadd fast float %Z, %X
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ret float %W
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}
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; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
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define float @test9_reassoc_nsz(float %X) {
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; CHECK-LABEL: @test9_reassoc_nsz(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], 4.000000e+00
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; CHECK-NEXT: ret float [[TMP1]]
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;
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%Y = fadd reassoc nsz float %X ,%X
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%Z = fadd reassoc nsz float %Y, %X
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%W = fadd reassoc nsz float %Z, %X
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ret float %W
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}
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; TODO: This doesn't require 'nsz'. It should fold to 4 * x
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define float @test9_reassoc(float %X) {
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; CHECK-LABEL: @test9_reassoc(
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; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[X:%.*]], [[X]]
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; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[X]]
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; CHECK-NEXT: [[W:%.*]] = fadd reassoc float [[Z]], [[X]]
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; CHECK-NEXT: ret float [[W]]
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;
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%Y = fadd reassoc float %X ,%X
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%Z = fadd reassoc float %Y, %X
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%W = fadd reassoc float %Z, %X
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ret float %W
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}
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define float @test10(float %W) {
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; CHECK-LABEL: @test10(
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; CHECK-NEXT: [[Z:%.*]] = fmul fast float [[W:%.*]], 3.810000e+02
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; CHECK-NEXT: ret float [[Z]]
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;
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%X = fmul fast float %W, 127.0
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%Y = fadd fast float %X ,%X
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%Z = fadd fast float %Y, %X
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ret float %Z
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}
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; Check again using the minimal subset of FMF.
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; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
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define float @test10_reassoc_nsz(float %W) {
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; CHECK-LABEL: @test10_reassoc_nsz(
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; CHECK-NEXT: [[Z:%.*]] = fmul reassoc nsz float [[W:%.*]], 3.810000e+02
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; CHECK-NEXT: ret float [[Z]]
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;
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%X = fmul reassoc nsz float %W, 127.0
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%Y = fadd reassoc nsz float %X ,%X
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%Z = fadd reassoc nsz float %Y, %X
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ret float %Z
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}
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; TODO: This doesn't require 'nsz'. It should fold to W*381.0.
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define float @test10_reassoc(float %W) {
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; CHECK-LABEL: @test10_reassoc(
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; CHECK-NEXT: [[X:%.*]] = fmul reassoc float [[W:%.*]], 1.270000e+02
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; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[X]], [[X]]
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; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[X]]
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; CHECK-NEXT: ret float [[Z]]
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;
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%X = fmul reassoc float %W, 127.0
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%Y = fadd reassoc float %X ,%X
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%Z = fadd reassoc float %Y, %X
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ret float %Z
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}
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define float @test11(float %X) {
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; CHECK-LABEL: @test11(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], 3.000000e+00
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; CHECK-NEXT: [[TMP2:%.*]] = fsub fast float 6.000000e+00, [[TMP1]]
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; CHECK-NEXT: ret float [[TMP2]]
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;
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%A = fsub fast float 1.000000e+00, %X
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%B = fsub fast float 2.000000e+00, %X
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%C = fsub fast float 3.000000e+00, %X
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%Y = fadd fast float %A ,%B
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%Z = fadd fast float %Y, %C
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ret float %Z
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}
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; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
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define float @test11_reassoc_nsz(float %X) {
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; CHECK-LABEL: @test11_reassoc_nsz(
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; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], 3.000000e+00
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; CHECK-NEXT: [[TMP2:%.*]] = fsub reassoc nsz float 6.000000e+00, [[TMP1]]
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; CHECK-NEXT: ret float [[TMP2]]
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;
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%A = fsub reassoc nsz float 1.000000e+00, %X
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%B = fsub reassoc nsz float 2.000000e+00, %X
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%C = fsub reassoc nsz float 3.000000e+00, %X
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%Y = fadd reassoc nsz float %A ,%B
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%Z = fadd reassoc nsz float %Y, %C
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ret float %Z
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}
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; TODO: This doesn't require 'nsz'. It should fold to (6.0 - 3.0*x)
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define float @test11_reassoc(float %X) {
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; CHECK-LABEL: @test11_reassoc(
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; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 1.000000e+00, [[X:%.*]]
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; CHECK-NEXT: [[B:%.*]] = fsub reassoc float 2.000000e+00, [[X]]
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; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 3.000000e+00, [[X]]
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; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[A]], [[B]]
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; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[C]]
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; CHECK-NEXT: ret float [[Z]]
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;
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%A = fsub reassoc float 1.000000e+00, %X
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%B = fsub reassoc float 2.000000e+00, %X
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%C = fsub reassoc float 3.000000e+00, %X
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%Y = fadd reassoc float %A ,%B
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%Z = fadd reassoc float %Y, %C
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ret float %Z
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}
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define float @test12(float %X1, float %X2, float %X3) {
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; CHECK-LABEL: @test12(
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; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[X3:%.*]], [[X2:%.*]]
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; CHECK-NEXT: [[D:%.*]] = fmul fast float [[TMP1]], [[X1:%.*]]
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; CHECK-NEXT: ret float [[D]]
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;
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%A = fsub fast float 0.000000e+00, %X1
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%B = fmul fast float %A, %X2 ; -X1*X2
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%C = fmul fast float %X1, %X3 ; X1*X3
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%D = fadd fast float %B, %C ; -X1*X2 + X1*X3 -> X1*(X3-X2)
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ret float %D
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}
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define float @test12_unary_fneg(float %X1, float %X2, float %X3) {
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; CHECK-LABEL: @test12_unary_fneg(
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; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[X3:%.*]], [[X2:%.*]]
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; CHECK-NEXT: [[D:%.*]] = fmul fast float [[TMP1]], [[X1:%.*]]
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; CHECK-NEXT: ret float [[D]]
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;
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%A = fneg fast float %X1
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%B = fmul fast float %A, %X2 ; -X1*X2
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%C = fmul fast float %X1, %X3 ; X1*X3
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%D = fadd fast float %B, %C ; -X1*X2 + X1*X3 -> X1*(X3-X2)
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ret float %D
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}
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define float @test12_reassoc_nsz(float %X1, float %X2, float %X3) {
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; CHECK-LABEL: @test12_reassoc_nsz(
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; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc nsz float [[X3:%.*]], [[X2:%.*]]
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; CHECK-NEXT: [[D:%.*]] = fmul reassoc nsz float [[TMP1]], [[X1:%.*]]
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; CHECK-NEXT: ret float [[D]]
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;
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%A = fsub reassoc nsz float 0.000000e+00, %X1
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%B = fmul reassoc nsz float %A, %X2 ; -X1*X2
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%C = fmul reassoc nsz float %X1, %X3 ; X1*X3
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%D = fadd reassoc nsz float %B, %C ; -X1*X2 + X1*X3 -> X1*(X3-X2)
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ret float %D
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}
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; TODO: check if 'nsz' is technically required. Currently the optimization
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; is not done with only 'reassoc' without 'nsz'.
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define float @test12_reassoc(float %X1, float %X2, float %X3) {
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; CHECK-LABEL: @test12_reassoc(
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; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 0.000000e+00, [[X1:%.*]]
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; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[A]], [[X2:%.*]]
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; CHECK-NEXT: [[C:%.*]] = fmul reassoc float [[X1]], [[X3:%.*]]
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; CHECK-NEXT: [[D:%.*]] = fadd reassoc float [[B]], [[C]]
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; CHECK-NEXT: ret float [[D]]
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;
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%A = fsub reassoc float 0.000000e+00, %X1
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%B = fmul reassoc float %A, %X2 ; -X1*X2
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%C = fmul reassoc float %X1, %X3 ; X1*X3
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%D = fadd reassoc float %B, %C ; -X1*X2 + X1*X3 -> X1*(X3-X2)
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ret float %D
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}
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; (x1 * 47) + (x2 * -47) => (x1 - x2) * 47
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; That only works with both instcombine and reassociate passes enabled.
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; Check that instcombine is not enough.
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define float @test13(float %X1, float %X2) {
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; CHECK-LABEL: @test13(
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; CHECK-NEXT: [[B:%.*]] = fmul fast float [[X1:%.*]], 4.700000e+01
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; CHECK-NEXT: [[C:%.*]] = fmul fast float [[X2:%.*]], -4.700000e+01
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; CHECK-NEXT: [[D:%.*]] = fadd fast float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[D]]
|
||||
;
|
||||
%B = fmul fast float %X1, 47. ; X1*47
|
||||
%C = fmul fast float %X2, -47. ; X2*-47
|
||||
%D = fadd fast float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
define float @test13_reassoc_nsz(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc_nsz(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc nsz float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc nsz float [[X2:%.*]], -4.700000e+01
|
||||
; CHECK-NEXT: [[D:%.*]] = fadd reassoc nsz float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[D]]
|
||||
;
|
||||
%B = fmul reassoc nsz float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc nsz float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc nsz float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
define float @test13_reassoc(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc float [[X2:%.*]], -4.700000e+01
|
||||
; CHECK-NEXT: [[D:%.*]] = fadd reassoc float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[D]]
|
||||
;
|
||||
%B = fmul reassoc float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
define float @test14(float %arg) {
|
||||
; CHECK-LABEL: @test14(
|
||||
; CHECK-NEXT: [[T2:%.*]] = fmul fast float [[ARG:%.*]], 1.440000e+02
|
||||
; CHECK-NEXT: ret float [[T2]]
|
||||
;
|
||||
%t1 = fmul fast float 1.200000e+01, %arg
|
||||
%t2 = fmul fast float %t1, 1.200000e+01
|
||||
ret float %t2
|
||||
}
|
||||
|
||||
define float @test14_reassoc(float %arg) {
|
||||
; CHECK-LABEL: @test14_reassoc(
|
||||
; CHECK-NEXT: [[T2:%.*]] = fmul reassoc float [[ARG:%.*]], 1.440000e+02
|
||||
; CHECK-NEXT: ret float [[T2]]
|
||||
;
|
||||
%t1 = fmul reassoc float 1.200000e+01, %arg
|
||||
%t2 = fmul reassoc float %t1, 1.200000e+01
|
||||
ret float %t2
|
||||
}
|
||||
|
||||
; (b+(a+1234))+-a -> b+1234
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that instcombine is not enough.
|
||||
|
||||
define float @test15(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub fast float [[TMP2]], [[A]]
|
||||
; CHECK-NEXT: ret float [[TMP3]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
%3 = fsub fast float 0.0, %a
|
||||
%4 = fadd fast float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_unary_fneg(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub fast float [[TMP2]], [[A]]
|
||||
; CHECK-NEXT: ret float [[TMP3]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
%3 = fneg fast float %a
|
||||
%4 = fadd fast float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_reassoc_nsz(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc nsz float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc nsz float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc nsz float [[TMP2]], [[A]]
|
||||
; CHECK-NEXT: ret float [[TMP3]]
|
||||
;
|
||||
%1 = fadd reassoc nsz float %a, 1234.0
|
||||
%2 = fadd reassoc nsz float %b, %1
|
||||
%3 = fsub reassoc nsz float 0.0, %a
|
||||
%4 = fadd reassoc nsz float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_reassoc(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc float 0.000000e+00, [[A]]
|
||||
; CHECK-NEXT: [[TMP4:%.*]] = fadd reassoc float [[TMP2]], [[TMP3]]
|
||||
; CHECK-NEXT: ret float [[TMP4]]
|
||||
;
|
||||
%1 = fadd reassoc float %a, 1234.0
|
||||
%2 = fadd reassoc float %b, %1
|
||||
%3 = fsub reassoc float 0.0, %a
|
||||
%4 = fadd reassoc float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
; X*-(Y*Z) -> X*-1*Y*Z
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that instcombine is not enough.
|
||||
|
||||
define float @test16(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16(
|
||||
; CHECK-NEXT: [[C:%.*]] = fneg fast float [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul fast float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[D]], [[C]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul fast float [[E]], -1.234500e+04
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub fast float 0.000000e+00, %z
|
||||
%d = fmul fast float %a, %b
|
||||
%e = fmul fast float %c, %d
|
||||
%f = fmul fast float %e, 1.234500e+04
|
||||
%g = fsub fast float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test16_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_unary_fneg(
|
||||
; CHECK-NEXT: [[C:%.*]] = fneg fast float [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul fast float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[D]], [[C]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul fast float [[E]], -1.234500e+04
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fneg fast float %z
|
||||
%d = fmul fast float %a, %b
|
||||
%e = fmul fast float %c, %d
|
||||
%f = fmul fast float %e, 1.234500e+04
|
||||
%g = fneg fast float %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test16_reassoc_nsz(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_reassoc_nsz(
|
||||
; CHECK-NEXT: [[C:%.*]] = fneg reassoc nsz float [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc nsz float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc nsz float [[D]], [[C]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul reassoc nsz float [[E]], -1.234500e+04
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub reassoc nsz float 0.000000e+00, %z
|
||||
%d = fmul reassoc nsz float %a, %b
|
||||
%e = fmul reassoc nsz float %c, %d
|
||||
%f = fmul reassoc nsz float %e, 1.234500e+04
|
||||
%g = fsub reassoc nsz float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test16_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_reassoc(
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 0.000000e+00, [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc float [[C]], [[D]]
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul reassoc float [[E]], 1.234500e+04
|
||||
; CHECK-NEXT: [[G:%.*]] = fsub reassoc float 0.000000e+00, [[F]]
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub reassoc float 0.000000e+00, %z
|
||||
%d = fmul reassoc float %a, %b
|
||||
%e = fmul reassoc float %c, %d
|
||||
%f = fmul reassoc float %e, 1.234500e+04
|
||||
%g = fsub reassoc float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test17(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul fast float %z, 4.000000e+01
|
||||
%c = fsub fast float 0.000000e+00, %d
|
||||
%e = fmul fast float %a, %c
|
||||
%f = fsub fast float 0.000000e+00, %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
define float @test17_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul fast float %z, 4.000000e+01
|
||||
%c = fneg fast float %d
|
||||
%e = fmul fast float %a, %c
|
||||
%f = fneg fast float %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
define float @test17_reassoc_nsz(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul reassoc nsz float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul reassoc nsz float %z, 4.000000e+01
|
||||
%c = fsub reassoc nsz float 0.000000e+00, %d
|
||||
%e = fmul reassoc nsz float %a, %c
|
||||
%f = fsub reassoc nsz float 0.000000e+00, %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
; Verify the fold is not done with only 'reassoc' ('nsz' is required).
|
||||
define float @test17_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_reassoc(
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 0.000000e+00, [[D]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc float [[C]], [[A:%.*]]
|
||||
; CHECK-NEXT: [[F:%.*]] = fsub reassoc float 0.000000e+00, [[E]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul reassoc float %z, 4.000000e+01
|
||||
%c = fsub reassoc float 0.000000e+00, %d
|
||||
%e = fmul reassoc float %a, %c
|
||||
%f = fsub reassoc float 0.000000e+00, %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
; fneg of fneg is an identity operation, so no FMF are needed to remove those instructions.
|
||||
|
||||
define float @test17_unary_fneg_no_FMF(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_unary_fneg_no_FMF(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul float %z, 4.000000e+01
|
||||
%c = fneg float %d
|
||||
%e = fmul float %a, %c
|
||||
%f = fneg float %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
define float @test17_reassoc_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_reassoc_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul reassoc float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul reassoc float %z, 4.000000e+01
|
||||
%c = fneg reassoc float %d
|
||||
%e = fmul reassoc float %a, %c
|
||||
%f = fneg reassoc float %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the 12 and -12 constants.
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that instcombine is not enough.
|
||||
|
||||
define float @test18(float %A, float %B) {
|
||||
; CHECK-LABEL: @test18(
|
||||
; CHECK-NEXT: [[X:%.*]] = fadd fast float [[A:%.*]], -1.200000e+01
|
||||
; CHECK-NEXT: [[Y:%.*]] = fsub fast float [[X]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd fast float [[Y]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd fast float -1.200000e+01, %A
|
||||
%Y = fsub fast float %X, %B
|
||||
%Z = fadd fast float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
define float @test18_reassoc(float %A, float %B) {
|
||||
; CHECK-LABEL: @test18_reassoc(
|
||||
; CHECK-NEXT: [[X:%.*]] = fadd reassoc float [[A:%.*]], -1.200000e+01
|
||||
; CHECK-NEXT: [[Y:%.*]] = fsub reassoc float [[X]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd reassoc float -1.200000e+01, %A
|
||||
%Y = fsub reassoc float %X, %B
|
||||
%Z = fadd reassoc float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the uses of %a.
|
||||
|
||||
define float @test19(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test19(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fneg fast float [[TMP1]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub fast float %a, %b
|
||||
%t5 = fsub fast float %t3, %c
|
||||
%t7 = fsub fast float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
define float @test19_reassoc_nsz(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test19_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc nsz float [[B:%.*]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fneg reassoc nsz float [[TMP1]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub reassoc nsz float %a, %b
|
||||
%t5 = fsub reassoc nsz float %t3, %c
|
||||
%t7 = fsub reassoc nsz float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
; Verify the fold is not done with only 'reassoc' ('nsz' is required).
|
||||
define float @test19_reassoc(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test19_reassoc(
|
||||
; CHECK-NEXT: [[T3:%.*]] = fsub reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[T5:%.*]] = fsub reassoc float [[T3]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fsub reassoc float [[T5]], [[A]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub reassoc float %a, %b
|
||||
%t5 = fsub reassoc float %t3, %c
|
||||
%t7 = fsub reassoc float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
|
@ -0,0 +1,307 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
;
|
||||
; Test cases in this file are intended to be run with both reassociate and
|
||||
; instcombine passes enabled.
|
||||
;
|
||||
; Test numbering remains continuous across:
|
||||
; - InstCombine/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-reassociate-gvn.ll
|
||||
; - Reassociate/fast-basictest.ll
|
||||
;
|
||||
; RUN: opt < %s -reassociate -instcombine -S | FileCheck %s --check-prefixes=CHECK,REASSOC_AND_IC --allow-unused-prefixes
|
||||
; RUN: opt < %s -O2 -S | FileCheck %s --check-prefixes=CHECK,O2 --allow-unused-prefixes
|
||||
|
||||
; test2 ... test18 - both reassociate and instcombine passes
|
||||
; are required to perform a transform
|
||||
|
||||
; ((a + (-3)) + b) + 3 -> a + b
|
||||
|
||||
define float @test2(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2(
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd fast float [[REG109:%.*]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: ret float [[REG117]]
|
||||
;
|
||||
%reg115 = fadd fast float %reg109, -3.000000e+01
|
||||
%reg116 = fadd fast float %reg115, %reg1111
|
||||
%reg117 = fadd fast float %reg116, 3.000000e+01
|
||||
ret float %reg117
|
||||
}
|
||||
|
||||
; Verify that fold is not done without 'fast'
|
||||
define float @test2_no_FMF(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2_no_FMF(
|
||||
; CHECK-NEXT: [[REG115:%.*]] = fadd float [[REG109:%.*]], -3.000000e+01
|
||||
; CHECK-NEXT: [[REG116:%.*]] = fadd float [[REG115]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd float [[REG116]], 3.000000e+01
|
||||
; CHECK-NEXT: ret float [[REG117]]
|
||||
;
|
||||
%reg115 = fadd float %reg109, -3.000000e+01
|
||||
%reg116 = fadd float %reg115, %reg1111
|
||||
%reg117 = fadd float %reg116, 3.000000e+01
|
||||
ret float %reg117
|
||||
}
|
||||
|
||||
define float @test2_reassoc(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2_reassoc(
|
||||
; CHECK-NEXT: [[REG115:%.*]] = fadd reassoc float [[REG109:%.*]], -3.000000e+01
|
||||
; CHECK-NEXT: [[REG116:%.*]] = fadd reassoc float [[REG115]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd reassoc float [[REG116]], 3.000000e+01
|
||||
; CHECK-NEXT: ret float [[REG117]]
|
||||
;
|
||||
%reg115 = fadd reassoc float %reg109, -3.000000e+01
|
||||
%reg116 = fadd reassoc float %reg115, %reg1111
|
||||
%reg117 = fadd reassoc float %reg116, 3.000000e+01
|
||||
ret float %reg117
|
||||
}
|
||||
|
||||
; (x1 * 47) + (x2 * -47) => (x1 - x2) * 47
|
||||
|
||||
define float @test13(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[X1:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fmul fast float [[TMP1]], 4.700000e+01
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%B = fmul fast float %X1, 47. ; X1*47
|
||||
%C = fmul fast float %X2, -47. ; X2*-47
|
||||
%D = fadd fast float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test13_reassoc_nsz(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc nsz float [[X1:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fmul reassoc nsz float [[TMP1]], 4.700000e+01
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%B = fmul reassoc nsz float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc nsz float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc nsz float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to ((x1 - x2) * 47.0)
|
||||
define float @test13_reassoc(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc float [[X2:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%B = fmul reassoc float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; (b+(a+1234))+-a -> b+1234
|
||||
|
||||
define float @test15(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
%3 = fsub fast float 0.0, %a
|
||||
%4 = fadd fast float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_unary_fneg(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
%3 = fneg fast float %a
|
||||
%4 = fadd fast float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
; TODO: check if it is possible to perform the optimization without 'fast'
|
||||
; with 'reassoc' and 'nsz' only.
|
||||
define float @test15_reassoc_nsz(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc nsz float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc nsz float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc nsz float [[TMP2]], [[A]]
|
||||
; CHECK-NEXT: ret float [[TMP3]]
|
||||
;
|
||||
%1 = fadd reassoc nsz float %a, 1234.0
|
||||
%2 = fadd reassoc nsz float %b, %1
|
||||
%3 = fsub reassoc nsz float 0.0, %a
|
||||
%4 = fadd reassoc nsz float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_reassoc(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc float 0.000000e+00, [[A]]
|
||||
; CHECK-NEXT: [[TMP4:%.*]] = fadd reassoc float [[TMP3]], [[TMP2]]
|
||||
; CHECK-NEXT: ret float [[TMP4]]
|
||||
;
|
||||
%1 = fadd reassoc float %a, 1234.0
|
||||
%2 = fadd reassoc float %b, %1
|
||||
%3 = fsub reassoc float 0.0, %a
|
||||
%4 = fadd reassoc float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
|
||||
|
||||
define float @test16(float %a, float %b, float %z) {
|
||||
; REASSOC_AND_IC-LABEL: @test16(
|
||||
; REASSOC_AND_IC-NEXT: [[C:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; REASSOC_AND_IC-NEXT: [[E:%.*]] = fmul fast float [[C]], [[B:%.*]]
|
||||
; REASSOC_AND_IC-NEXT: [[F:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; REASSOC_AND_IC-NEXT: ret float [[F]]
|
||||
;
|
||||
; O2-LABEL: @test16(
|
||||
; O2-NEXT: [[D:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; O2-NEXT: [[E:%.*]] = fmul fast float [[D]], [[B:%.*]]
|
||||
; O2-NEXT: [[G:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; O2-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub fast float 0.000000e+00, %z
|
||||
%d = fmul fast float %a, %b
|
||||
%e = fmul fast float %c, %d
|
||||
%f = fmul fast float %e, 1.234500e+04
|
||||
%g = fsub fast float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test16_unary_fneg(float %a, float %b, float %z) {
|
||||
; REASSOC_AND_IC-LABEL: @test16_unary_fneg(
|
||||
; REASSOC_AND_IC-NEXT: [[E:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; REASSOC_AND_IC-NEXT: [[F:%.*]] = fmul fast float [[E]], [[B:%.*]]
|
||||
; REASSOC_AND_IC-NEXT: [[G:%.*]] = fmul fast float [[F]], [[Z:%.*]]
|
||||
; REASSOC_AND_IC-NEXT: ret float [[G]]
|
||||
;
|
||||
; O2-LABEL: @test16_unary_fneg(
|
||||
; O2-NEXT: [[D:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; O2-NEXT: [[E:%.*]] = fmul fast float [[D]], [[B:%.*]]
|
||||
; O2-NEXT: [[G:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; O2-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fneg fast float %z
|
||||
%d = fmul fast float %a, %b
|
||||
%e = fmul fast float %c, %d
|
||||
%f = fmul fast float %e, 1.234500e+04
|
||||
%g = fneg fast float %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
; TODO: check if it is possible to perform the optimization without 'fast'
|
||||
; with 'reassoc' and 'nsz' only.
|
||||
define float @test16_reassoc_nsz(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_reassoc_nsz(
|
||||
; CHECK-NEXT: [[C:%.*]] = fneg reassoc nsz float [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc nsz float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc nsz float [[D]], [[C]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul reassoc nsz float [[E]], -1.234500e+04
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub reassoc nsz float 0.000000e+00, %z
|
||||
%d = fmul reassoc nsz float %a, %b
|
||||
%e = fmul reassoc nsz float %c, %d
|
||||
%f = fmul reassoc nsz float %e, 1.234500e+04
|
||||
%g = fsub reassoc nsz float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
define float @test16_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_reassoc(
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 0.000000e+00, [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc float [[D]], [[C]]
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul reassoc float [[E]], 1.234500e+04
|
||||
; CHECK-NEXT: [[G:%.*]] = fsub reassoc float 0.000000e+00, [[F]]
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fsub reassoc float 0.000000e+00, %z
|
||||
%d = fmul reassoc float %a, %b
|
||||
%e = fmul reassoc float %c, %d
|
||||
%f = fmul reassoc float %e, 1.234500e+04
|
||||
%g = fsub reassoc float 0.000000e+00, %f
|
||||
ret float %g
|
||||
}
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the 12 and -12 constants.
|
||||
|
||||
define float @test18(float %A, float %B) {
|
||||
; CHECK-LABEL: @test18(
|
||||
; CHECK-NEXT: [[Z:%.*]] = fsub fast float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd fast float -1.200000e+01, %A
|
||||
%Y = fsub fast float %X, %B
|
||||
%Z = fadd fast float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
define float @test18_reassoc(float %A, float %B) {
|
||||
; CHECK-LABEL: @test18_reassoc(
|
||||
; CHECK-NEXT: [[X:%.*]] = fadd reassoc float [[A:%.*]], -1.200000e+01
|
||||
; CHECK-NEXT: [[Y:%.*]] = fsub reassoc float [[X]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd reassoc float -1.200000e+01, %A
|
||||
%Y = fsub reassoc float %X, %B
|
||||
%Z = fadd reassoc float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; test18 - check that the bug described in the revision does not appear:
|
||||
; https://reviews.llvm.org/D72521
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the uses of %a.
|
||||
|
||||
define float @test19(float %a, float %b, float %c) nounwind {
|
||||
; REASSOC_AND_IC-LABEL: @test19(
|
||||
; REASSOC_AND_IC-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], [[C:%.*]]
|
||||
; REASSOC_AND_IC-NEXT: [[T7:%.*]] = fneg fast float [[TMP1]]
|
||||
; REASSOC_AND_IC-NEXT: ret float [[T7]]
|
||||
;
|
||||
; O2-LABEL: @test19(
|
||||
; O2-NEXT: [[TMP1:%.*]] = fadd fast float [[C:%.*]], [[B:%.*]]
|
||||
; O2-NEXT: [[T7:%.*]] = fneg fast float [[TMP1]]
|
||||
; O2-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub fast float %a, %b
|
||||
%t5 = fsub fast float %t3, %c
|
||||
%t7 = fsub fast float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
define float @test19_reassoc_nsz(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test19_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc nsz float [[B:%.*]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fneg reassoc nsz float [[TMP1]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub reassoc nsz float %a, %b
|
||||
%t5 = fsub reassoc nsz float %t3, %c
|
||||
%t7 = fsub reassoc nsz float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
; Verify the fold is not done with only 'reassoc' ('nsz' is required).
|
||||
define float @test19_reassoc(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test19_reassoc(
|
||||
; CHECK-NEXT: [[T3:%.*]] = fsub reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[T5:%.*]] = fsub reassoc float [[T3]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fsub reassoc float [[T5]], [[A]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub reassoc float %a, %b
|
||||
%t5 = fsub reassoc float %t3, %c
|
||||
%t7 = fsub reassoc float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
|
@ -0,0 +1,103 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
;
|
||||
; Test cases in this file are intended to be run with both reassociate and
|
||||
; gvn passes enabled.
|
||||
;
|
||||
; Test numbering remains continuous across:
|
||||
; - InstCombine/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-reassociate-gvn.ll
|
||||
; - Reassociate/fast-basictest.ll
|
||||
;
|
||||
; RUN: opt < %s -reassociate -gvn -S | FileCheck %s --check-prefixes=CHECK,REASSOC_AND_GVN --allow-unused-prefixes
|
||||
; RUN: opt < %s -O2 -S | FileCheck %s --check-prefixes=CHECK,O2 --allow-unused-prefixes
|
||||
|
||||
@fe = external global float
|
||||
@fa = external global float
|
||||
@fb = external global float
|
||||
@fc = external global float
|
||||
@ff = external global float
|
||||
|
||||
; If two sums of the same operands in different order are counted with 'fast'
|
||||
; flag and then stored to global variables, we can reuse the same value twice.
|
||||
; Sums:
|
||||
; - test3: (a+b)+c and (a+c)+b
|
||||
; - test4: c+(a+b) and (c+a)+b
|
||||
; - test5: c+(b+a) and (c+a)+b
|
||||
; TODO: check if 'reassoc' flag is technically enough for this optimization
|
||||
; (currently the transformation is not done with 'reassoc' only).
|
||||
|
||||
define void @test3() {
|
||||
; CHECK-LABEL: @test3(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %A, %B
|
||||
%t2 = fadd fast float %t1, %C
|
||||
%t3 = fadd fast float %A, %C
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = (a+b)+c;
|
||||
store float %t2, float* @fe
|
||||
; f = (a+c)+b
|
||||
store float %t4, float* @ff
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @test4() {
|
||||
; CHECK-LABEL: @test4(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %A, %B
|
||||
%t2 = fadd fast float %C, %t1
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = c+(a+b)
|
||||
store float %t2, float* @fe
|
||||
; f = (c+a)+b
|
||||
store float %t4, float* @ff
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @test5() {
|
||||
; CHECK-LABEL: @test5(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %B, %A
|
||||
%t2 = fadd fast float %C, %t1
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = c+(b+a)
|
||||
store float %t2, float* @fe
|
||||
; f = (c+a)+b
|
||||
store float %t4, float* @ff
|
||||
ret void
|
||||
}
|
||||
|
|
@ -1,43 +1,32 @@
|
|||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt < %s -reassociate -gvn -instcombine -S | FileCheck %s
|
||||
|
||||
; With reassociation, constant folding can eliminate the 12 and -12 constants.
|
||||
define float @test1(float %arg) {
|
||||
; CHECK-LABEL: @test1(
|
||||
; CHECK-NEXT: [[ARG_NEG:%.*]] = fneg fast float [[ARG:%.*]]
|
||||
; CHECK-NEXT: ret float [[ARG_NEG]]
|
||||
;
|
||||
%t1 = fsub fast float -1.200000e+01, %arg
|
||||
%t2 = fadd fast float %t1, 1.200000e+01
|
||||
ret float %t2
|
||||
}
|
||||
|
||||
; Check again using the minimal subset of FMF.
|
||||
; Both 'reassoc' and 'nsz' are required.
|
||||
define float @test1_minimal(float %arg) {
|
||||
; CHECK-LABEL: @test1_minimal(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg reassoc nsz float [[ARG:%.*]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
; Test numbering remains continuous across:
|
||||
; - InstCombine/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-basictest.ll
|
||||
; - PhaseOrdering/fast-reassociate-gvn.ll
|
||||
; - Reassociate/fast-basictest.ll
|
||||
;
|
||||
%t1 = fsub reassoc nsz float -1.200000e+01, %arg
|
||||
%t2 = fadd reassoc nsz float %t1, 1.200000e+01
|
||||
ret float %t2
|
||||
}
|
||||
; RUN: opt < %s -reassociate -S | FileCheck %s
|
||||
|
||||
; Verify the fold is not done with only 'reassoc' ('nsz' is required).
|
||||
define float @test1_reassoc(float %arg) {
|
||||
; CHECK-LABEL: @test1_reassoc(
|
||||
; CHECK-NEXT: [[T1:%.*]] = fsub reassoc float -1.200000e+01, [[ARG:%.*]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd reassoc float [[T1]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[T2]]
|
||||
;
|
||||
%t1 = fsub reassoc float -1.200000e+01, %arg
|
||||
%t2 = fadd reassoc float %t1, 1.200000e+01
|
||||
ret float %t2
|
||||
}
|
||||
; ((a + (-3)) + b) + 3 -> a + b
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that reassociate is not enough.
|
||||
|
||||
; TODO: check if we can eliminate zero add.
|
||||
define float @test2(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2(
|
||||
; CHECK-NEXT: [[REG116:%.*]] = fadd fast float [[REG109:%.*]], 0.000000e+00
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd fast float [[REG116]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: ret float [[REG117]]
|
||||
;
|
||||
%reg115 = fadd fast float %reg109, -3.000000e+01
|
||||
%reg116 = fadd fast float %reg115, %reg1111
|
||||
%reg117 = fadd fast float %reg116, 3.000000e+01
|
||||
ret float %reg117
|
||||
}
|
||||
|
||||
define float @test2_no_FMF(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2_no_FMF(
|
||||
; CHECK-NEXT: [[REG115:%.*]] = fadd float [[REG109:%.*]], -3.000000e+01
|
||||
; CHECK-NEXT: [[REG116:%.*]] = fadd float [[REG115]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd float [[REG116]], 3.000000e+01
|
||||
|
|
@ -49,19 +38,8 @@ define float @test2(float %reg109, float %reg1111) {
|
|||
ret float %reg117
|
||||
}
|
||||
|
||||
define float @test3(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test3(
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd fast float [[REG109:%.*]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: ret float [[REG117]]
|
||||
;
|
||||
%reg115 = fadd fast float %reg109, -3.000000e+01
|
||||
%reg116 = fadd fast float %reg115, %reg1111
|
||||
%reg117 = fadd fast float %reg116, 3.000000e+01
|
||||
ret float %reg117
|
||||
}
|
||||
|
||||
define float @test3_reassoc(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test3_reassoc(
|
||||
define float @test2_reassoc(float %reg109, float %reg1111) {
|
||||
; CHECK-LABEL: @test2_reassoc(
|
||||
; CHECK-NEXT: [[REG115:%.*]] = fadd reassoc float [[REG109:%.*]], -3.000000e+01
|
||||
; CHECK-NEXT: [[REG116:%.*]] = fadd reassoc float [[REG115]], [[REG1111:%.*]]
|
||||
; CHECK-NEXT: [[REG117:%.*]] = fadd reassoc float [[REG116]], 3.000000e+01
|
||||
|
|
@ -79,15 +57,27 @@ define float @test3_reassoc(float %reg109, float %reg1111) {
|
|||
@fc = external global float
|
||||
@ff = external global float
|
||||
|
||||
define void @test4() {
|
||||
; CHECK-LABEL: @test4(
|
||||
; If two sums of the same operands in different order are counted with 'fast'
|
||||
; flag and then stored to global variables, we can reuse the same value twice.
|
||||
; Sums:
|
||||
; - test3: (a+b)+c and (a+c)+b
|
||||
; - test4: c+(a+b) and (c+a)+b
|
||||
; - test5: c+(b+a) and (c+a)+b
|
||||
;
|
||||
; That only works with both gvn and reassociate passes enabled.
|
||||
; Check that reassociate is not enough.
|
||||
|
||||
define void @test3() {
|
||||
; CHECK-LABEL: @test3(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: [[T3:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T4:%.*]] = fadd fast float [[T3]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: store float [[T4]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
|
|
@ -95,7 +85,7 @@ define void @test4() {
|
|||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %A, %B
|
||||
%t2 = fadd fast float %t1, %C
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t3 = fadd fast float %A, %C
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = (a+b)+c;
|
||||
store float %t2, float* @fe
|
||||
|
|
@ -104,6 +94,33 @@ define void @test4() {
|
|||
ret void
|
||||
}
|
||||
|
||||
define void @test4() {
|
||||
; CHECK-LABEL: @test4(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: [[T3:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T4:%.*]] = fadd fast float [[T3]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T4]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %A, %B
|
||||
%t2 = fadd fast float %C, %t1
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = c+(a+b)
|
||||
store float %t2, float* @fe
|
||||
; f = (c+a)+b
|
||||
store float %t4, float* @ff
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @test5() {
|
||||
; CHECK-LABEL: @test5(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
|
|
@ -111,40 +128,17 @@ define void @test5() {
|
|||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: [[T3:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T4:%.*]] = fadd fast float [[T3]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %A, %B
|
||||
%t2 = fadd fast float %t1, %C
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = c+(a+b)
|
||||
store float %t2, float* @fe
|
||||
; f = (c+a)+b
|
||||
store float %t4, float* @ff
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @test6() {
|
||||
; CHECK-LABEL: @test6(
|
||||
; CHECK-NEXT: [[A:%.*]] = load float, float* @fa, align 4
|
||||
; CHECK-NEXT: [[B:%.*]] = load float, float* @fb, align 4
|
||||
; CHECK-NEXT: [[C:%.*]] = load float, float* @fc, align 4
|
||||
; CHECK-NEXT: [[T1:%.*]] = fadd fast float [[B]], [[A]]
|
||||
; CHECK-NEXT: [[T2:%.*]] = fadd fast float [[T1]], [[C]]
|
||||
; CHECK-NEXT: store float [[T2]], float* @fe, align 4
|
||||
; CHECK-NEXT: store float [[T2]], float* @ff, align 4
|
||||
; CHECK-NEXT: store float [[T4]], float* @ff, align 4
|
||||
; CHECK-NEXT: ret void
|
||||
;
|
||||
%A = load float, float* @fa
|
||||
%B = load float, float* @fb
|
||||
%C = load float, float* @fc
|
||||
%t1 = fadd fast float %B, %A
|
||||
%t2 = fadd fast float %t1, %C
|
||||
%t2 = fadd fast float %C, %t1
|
||||
%t3 = fadd fast float %C, %A
|
||||
%t4 = fadd fast float %t3, %B
|
||||
; e = c+(b+a)
|
||||
|
|
@ -154,8 +148,8 @@ define void @test6() {
|
|||
ret void
|
||||
}
|
||||
|
||||
define float @test7(float %A, float %B, float %C) {
|
||||
; CHECK-LABEL: @test7(
|
||||
define float @test6(float %A, float %B, float %C) {
|
||||
; CHECK-LABEL: @test6(
|
||||
; CHECK-NEXT: [[REASS_ADD1:%.*]] = fadd fast float [[C:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[REASS_MUL2:%.*]] = fmul fast float [[A:%.*]], [[A]]
|
||||
; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_MUL2]], [[REASS_ADD1]]
|
||||
|
|
@ -169,12 +163,12 @@ define float @test7(float %A, float %B, float %C) {
|
|||
ret float %r
|
||||
}
|
||||
|
||||
define float @test7_reassoc(float %A, float %B, float %C) {
|
||||
; CHECK-LABEL: @test7_reassoc(
|
||||
define float @test6_reassoc(float %A, float %B, float %C) {
|
||||
; CHECK-LABEL: @test6_reassoc(
|
||||
; CHECK-NEXT: [[AA:%.*]] = fmul reassoc float [[A:%.*]], [[A]]
|
||||
; CHECK-NEXT: [[AAB:%.*]] = fmul reassoc float [[AA]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc float [[A]], [[A]]
|
||||
; CHECK-NEXT: [[AAC:%.*]] = fmul reassoc float [[TMP1]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[AC:%.*]] = fmul reassoc float [[A]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[AAC:%.*]] = fmul reassoc float [[A]], [[AC]]
|
||||
; CHECK-NEXT: [[R:%.*]] = fadd reassoc float [[AAB]], [[AAC]]
|
||||
; CHECK-NEXT: ret float [[R]]
|
||||
;
|
||||
|
|
@ -187,12 +181,16 @@ define float @test7_reassoc(float %A, float %B, float %C) {
|
|||
}
|
||||
|
||||
; (-X)*Y + Z -> Z-X*Y
|
||||
; TODO: check why IR transformation of test7 with 'fast' math flag
|
||||
; is worse than without it (and even without transformation)
|
||||
|
||||
define float @test8(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test8(
|
||||
define float @test7(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test7(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float 0.000000e+00, 0.000000e+00
|
||||
; CHECK-NEXT: [[A:%.*]] = fmul fast float [[Y:%.*]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub fast float [[Z:%.*]], [[A]]
|
||||
; CHECK-NEXT: ret float [[C]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul fast float [[A]], 1.000000e+00
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fsub fast float [[Z:%.*]], [[B]]
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%A = fsub fast float 0.0, %X
|
||||
%B = fmul fast float %A, %Y
|
||||
|
|
@ -200,11 +198,13 @@ define float @test8(float %X, float %Y, float %Z) {
|
|||
ret float %C
|
||||
}
|
||||
|
||||
define float @test8_unary_fneg(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test8_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[X:%.*]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub fast float [[Z:%.*]], [[TMP1]]
|
||||
; CHECK-NEXT: ret float [[C]]
|
||||
define float @test7_unary_fneg(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test7_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float 0.000000e+00
|
||||
; CHECK-NEXT: [[A:%.*]] = fmul fast float [[Y:%.*]], [[X:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul fast float [[A]], 1.000000e+00
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fsub fast float [[Z:%.*]], [[B]]
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%A = fneg fast float %X
|
||||
%B = fmul fast float %A, %Y
|
||||
|
|
@ -212,8 +212,22 @@ define float @test8_unary_fneg(float %X, float %Y, float %Z) {
|
|||
ret float %C
|
||||
}
|
||||
|
||||
define float @test8_reassoc(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test8_reassoc(
|
||||
define float @test7_reassoc_nsz(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test7_reassoc_nsz(
|
||||
; CHECK-NEXT: [[A:%.*]] = fsub reassoc nsz float 0.000000e+00, [[X:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc nsz float [[A]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fadd reassoc nsz float [[B]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[C]]
|
||||
;
|
||||
%A = fsub reassoc nsz float 0.0, %X
|
||||
%B = fmul reassoc nsz float %A, %Y
|
||||
%C = fadd reassoc nsz float %B, %Z
|
||||
ret float %C
|
||||
}
|
||||
|
||||
; Verify that fold is not done only with 'reassoc' ('nsz' is required)
|
||||
define float @test7_reassoc(float %X, float %Y, float %Z) {
|
||||
; CHECK-LABEL: @test7_reassoc(
|
||||
; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 0.000000e+00, [[X:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[A]], [[Y:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fadd reassoc float [[B]], [[Z:%.*]]
|
||||
|
|
@ -225,8 +239,8 @@ define float @test8_reassoc(float %X, float %Y, float %Z) {
|
|||
ret float %C
|
||||
}
|
||||
|
||||
define float @test9(float %X) {
|
||||
; CHECK-LABEL: @test9(
|
||||
define float @test8(float %X) {
|
||||
; CHECK-LABEL: @test8(
|
||||
; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float [[X:%.*]], 9.400000e+01
|
||||
; CHECK-NEXT: ret float [[FACTOR]]
|
||||
;
|
||||
|
|
@ -235,34 +249,11 @@ define float @test9(float %X) {
|
|||
ret float %Z
|
||||
}
|
||||
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test9_reassoc_nsz(float %X) {
|
||||
; CHECK-LABEL: @test9_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], 9.400000e+01
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%Y = fmul reassoc nsz float %X, 4.700000e+01
|
||||
%Z = fadd reassoc nsz float %Y, %Y
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to X * 94.0
|
||||
define float @test9_reassoc(float %X) {
|
||||
; CHECK-LABEL: @test9_reassoc(
|
||||
; CHECK-NEXT: [[Y:%.*]] = fmul reassoc float [[X:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[Y]]
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%Y = fmul reassoc float %X, 4.700000e+01
|
||||
%Z = fadd reassoc float %Y, %Y
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; Side note: (x + x + x) and (3*x) each have only a single rounding. So
|
||||
; transforming x+x+x to 3*x is always safe, even without any FMF.
|
||||
; To avoid that special-case, we have the addition of 'x' four times, here.
|
||||
define float @test10(float %X) {
|
||||
; CHECK-LABEL: @test10(
|
||||
define float @test9(float %X) {
|
||||
; CHECK-LABEL: @test9(
|
||||
; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float [[X:%.*]], 4.000000e+00
|
||||
; CHECK-NEXT: ret float [[FACTOR]]
|
||||
;
|
||||
|
|
@ -272,34 +263,8 @@ define float @test10(float %X) {
|
|||
ret float %W
|
||||
}
|
||||
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test10_reassoc_nsz(float %X) {
|
||||
; CHECK-LABEL: @test10_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], 4.000000e+00
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%Y = fadd reassoc nsz float %X ,%X
|
||||
%Z = fadd reassoc nsz float %Y, %X
|
||||
%W = fadd reassoc nsz float %Z, %X
|
||||
ret float %W
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to 4 * x
|
||||
define float @test10_reassoc(float %X) {
|
||||
; CHECK-LABEL: @test10_reassoc(
|
||||
; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[X:%.*]], [[X]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], [[X]]
|
||||
; CHECK-NEXT: [[W:%.*]] = fadd reassoc float [[Z]], [[X]]
|
||||
; CHECK-NEXT: ret float [[W]]
|
||||
;
|
||||
%Y = fadd reassoc float %X ,%X
|
||||
%Z = fadd reassoc float %Y, %X
|
||||
%W = fadd reassoc float %Z, %X
|
||||
ret float %W
|
||||
}
|
||||
|
||||
define float @test11(float %W) {
|
||||
; CHECK-LABEL: @test11(
|
||||
define float @test10(float %W) {
|
||||
; CHECK-LABEL: @test10(
|
||||
; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float [[W:%.*]], 3.810000e+02
|
||||
; CHECK-NEXT: ret float [[FACTOR]]
|
||||
;
|
||||
|
|
@ -309,35 +274,9 @@ define float @test11(float %W) {
|
|||
ret float %Z
|
||||
}
|
||||
|
||||
; Check again using the minimal subset of FMF.
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test11_reassoc_nsz(float %W) {
|
||||
; CHECK-LABEL: @test11_reassoc_nsz(
|
||||
; CHECK-NEXT: [[Z:%.*]] = fmul reassoc nsz float [[W:%.*]], 3.810000e+02
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fmul reassoc nsz float %W, 127.0
|
||||
%Y = fadd reassoc nsz float %X ,%X
|
||||
%Z = fadd reassoc nsz float %Y, %X
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to W*381.0.
|
||||
define float @test11_reassoc(float %W) {
|
||||
; CHECK-LABEL: @test11_reassoc(
|
||||
; CHECK-NEXT: [[X:%.*]] = fmul reassoc float [[W:%.*]], 1.270000e+02
|
||||
; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[X]], [[X]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[X]], [[Y]]
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fmul reassoc float %W, 127.0
|
||||
%Y = fadd reassoc float %X ,%X
|
||||
%Z = fadd reassoc float %Y, %X
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
define float @test12(float %X) {
|
||||
; CHECK-LABEL: @test12(
|
||||
define float @test11(float %X) {
|
||||
; CHECK-LABEL: @test11(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float 0.000000e+00
|
||||
; CHECK-NEXT: [[FACTOR:%.*]] = fmul fast float [[X:%.*]], -3.000000e+00
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd fast float [[FACTOR]], 6.000000e+00
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
|
|
@ -350,44 +289,17 @@ define float @test12(float %X) {
|
|||
ret float %Z
|
||||
}
|
||||
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test12_reassoc_nsz(float %X) {
|
||||
; CHECK-LABEL: @test12_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc nsz float [[X:%.*]], -3.000000e+00
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc nsz float [[TMP1]], 6.000000e+00
|
||||
; TODO: check why IR transformation of test12 with 'fast' math flag
|
||||
; is worse than without it (and even without transformation)
|
||||
|
||||
define float @test12(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test12(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float 0.000000e+00, 0.000000e+00
|
||||
; CHECK-NEXT: [[A:%.*]] = fmul fast float [[X2:%.*]], [[X1:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul fast float [[A]], 1.000000e+00
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul fast float [[X3:%.*]], [[X1]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fsub fast float [[C]], [[B]]
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%A = fsub reassoc nsz float 1.000000e+00, %X
|
||||
%B = fsub reassoc nsz float 2.000000e+00, %X
|
||||
%C = fsub reassoc nsz float 3.000000e+00, %X
|
||||
%Y = fadd reassoc nsz float %A ,%B
|
||||
%Z = fadd reassoc nsz float %Y, %C
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to (6.0 - 3.0*x)
|
||||
define float @test12_reassoc(float %X) {
|
||||
; CHECK-LABEL: @test12_reassoc(
|
||||
; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 1.000000e+00, [[X:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fsub reassoc float 2.000000e+00, [[X]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 3.000000e+00, [[X]]
|
||||
; CHECK-NEXT: [[Y:%.*]] = fadd reassoc float [[A]], [[B]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[C]], [[Y]]
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%A = fsub reassoc float 1.000000e+00, %X
|
||||
%B = fsub reassoc float 2.000000e+00, %X
|
||||
%C = fsub reassoc float 3.000000e+00, %X
|
||||
%Y = fadd reassoc float %A ,%B
|
||||
%Z = fadd reassoc float %Y, %C
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
define float @test13(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test13(
|
||||
; CHECK-NEXT: [[REASS_ADD:%.*]] = fsub fast float [[X3:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD]], [[X1:%.*]]
|
||||
; CHECK-NEXT: ret float [[REASS_MUL]]
|
||||
;
|
||||
%A = fsub fast float 0.000000e+00, %X1
|
||||
%B = fmul fast float %A, %X2 ; -X1*X2
|
||||
|
|
@ -396,11 +308,14 @@ define float @test13(float %X1, float %X2, float %X3) {
|
|||
ret float %D
|
||||
}
|
||||
|
||||
define float @test13_unary_fneg(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test13_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[X3:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul fast float [[TMP1]], [[X1:%.*]]
|
||||
; CHECK-NEXT: ret float [[D]]
|
||||
define float @test12_unary_fneg(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test12_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float 0.000000e+00
|
||||
; CHECK-NEXT: [[A:%.*]] = fmul fast float [[X2:%.*]], [[X1:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul fast float [[A]], 1.000000e+00
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul fast float [[X3:%.*]], [[X1]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fsub fast float [[C]], [[B]]
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%A = fneg fast float %X1
|
||||
%B = fmul fast float %A, %X2 ; -X1*X2
|
||||
|
|
@ -409,8 +324,25 @@ define float @test13_unary_fneg(float %X1, float %X2, float %X3) {
|
|||
ret float %D
|
||||
}
|
||||
|
||||
define float @test13_reassoc(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test13_reassoc(
|
||||
define float @test12_reassoc_nsz(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test12_reassoc_nsz(
|
||||
; CHECK-NEXT: [[A:%.*]] = fsub reassoc nsz float 0.000000e+00, [[X1:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc nsz float [[A]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc nsz float [[X1]], [[X3:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fadd reassoc nsz float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[D]]
|
||||
;
|
||||
%A = fsub reassoc nsz float 0.000000e+00, %X1
|
||||
%B = fmul reassoc nsz float %A, %X2 ; -X1*X2
|
||||
%C = fmul reassoc nsz float %X1, %X3 ; X1*X3
|
||||
%D = fadd reassoc nsz float %B, %C ; -X1*X2 + X1*X3 -> X1*(X3-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; TODO: check if 'nsz' is technically required. Currently the optimization
|
||||
; is not done with only 'reassoc' without 'nsz'.
|
||||
define float @test12_reassoc(float %X1, float %X2, float %X3) {
|
||||
; CHECK-LABEL: @test12_reassoc(
|
||||
; CHECK-NEXT: [[A:%.*]] = fsub reassoc float 0.000000e+00, [[X1:%.*]]
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[A]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc float [[X1]], [[X3:%.*]]
|
||||
|
|
@ -424,48 +356,51 @@ define float @test13_reassoc(float %X1, float %X2, float %X3) {
|
|||
ret float %D
|
||||
}
|
||||
|
||||
define float @test14(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test14(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[X1:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[D1:%.*]] = fmul fast float [[TMP1]], 4.700000e+01
|
||||
; CHECK-NEXT: ret float [[D1]]
|
||||
; (x1 * 47) + (x2 * -47) => (x1 - x2) * 47
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that reassociate is not enough.
|
||||
|
||||
define float @test13(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul fast float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul fast float [[X2:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%B = fmul fast float %X1, 47. ; X1*47
|
||||
%C = fmul fast float %X2, -47. ; X2*-47
|
||||
%D = fadd fast float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
%D = fadd fast float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; (x1 * 47) + (x2 * -47) => (x1 - x2) * 47
|
||||
; Check again with 'reassoc' and 'nsz' ('nsz' not technically required).
|
||||
define float @test14_reassoc_nsz(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test14_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc nsz float [[X1:%.*]], [[X2:%.*]]
|
||||
; CHECK-NEXT: [[D1:%.*]] = fmul reassoc nsz float [[TMP1]], 4.700000e+01
|
||||
; CHECK-NEXT: ret float [[D1]]
|
||||
define float @test13_reassoc_nsz(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc_nsz(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc nsz float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc nsz float [[X2:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc nsz float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%B = fmul reassoc nsz float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc nsz float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc nsz float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
%D = fadd reassoc nsz float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
; TODO: This doesn't require 'nsz'. It should fold to ((x1 - x2) * 47.0)
|
||||
define float @test14_reassoc(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test14_reassoc(
|
||||
define float @test13_reassoc(float %X1, float %X2) {
|
||||
; CHECK-LABEL: @test13_reassoc(
|
||||
; CHECK-NEXT: [[B:%.*]] = fmul reassoc float [[X1:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul reassoc float [[X2:%.*]], 4.700000e+01
|
||||
; CHECK-NEXT: [[D1:%.*]] = fsub reassoc float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[D1]]
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub reassoc float [[B]], [[C]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
;
|
||||
%B = fmul reassoc float %X1, 47. ; X1*47
|
||||
%C = fmul reassoc float %X2, -47. ; X2*-47
|
||||
%D = fadd reassoc float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
%D = fadd reassoc float %B, %C ; X1*47 + X2*-47 -> 47*(X1-X2)
|
||||
ret float %D
|
||||
}
|
||||
|
||||
define float @test15(float %arg) {
|
||||
; CHECK-LABEL: @test15(
|
||||
define float @test14(float %arg) {
|
||||
; CHECK-LABEL: @test14(
|
||||
; CHECK-NEXT: [[T2:%.*]] = fmul fast float [[ARG:%.*]], 1.440000e+02
|
||||
; CHECK-NEXT: ret float [[T2]]
|
||||
;
|
||||
|
|
@ -474,9 +409,12 @@ define float @test15(float %arg) {
|
|||
ret float %t2
|
||||
}
|
||||
|
||||
define float @test15_reassoc(float %arg) {
|
||||
; CHECK-LABEL: @test15_reassoc(
|
||||
; CHECK-NEXT: [[T2:%.*]] = fmul reassoc float [[ARG:%.*]], 1.440000e+02
|
||||
; TODO: check if we can transform the code with 'reassoc' only.
|
||||
; The same IR is transformed to one fmul in instcombine pass.
|
||||
define float @test14_reassoc(float %arg) {
|
||||
; CHECK-LABEL: @test14_reassoc(
|
||||
; CHECK-NEXT: [[T1:%.*]] = fmul reassoc float [[ARG:%.*]], 1.200000e+01
|
||||
; CHECK-NEXT: [[T2:%.*]] = fmul reassoc float [[T1]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[T2]]
|
||||
;
|
||||
%t1 = fmul reassoc float 1.200000e+01, %arg
|
||||
|
|
@ -485,10 +423,15 @@ define float @test15_reassoc(float %arg) {
|
|||
}
|
||||
|
||||
; (b+(a+1234))+-a -> b+1234
|
||||
define float @test16(float %b, float %a) {
|
||||
; CHECK-LABEL: @test16(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that reassociate is not enough.
|
||||
|
||||
; TODO: check if we can remove dead fsub.
|
||||
define float @test15(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float 0.000000e+00, [[A:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
|
|
@ -497,10 +440,12 @@ define float @test16(float %b, float %a) {
|
|||
ret float %4
|
||||
}
|
||||
|
||||
define float @test16_unary_fneg(float %b, float %a) {
|
||||
; CHECK-LABEL: @test16_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
; TODO: check if we can remove dead fneg.
|
||||
define float @test15_unary_fneg(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float [[A:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[B:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%1 = fadd fast float %a, 1234.0
|
||||
%2 = fadd fast float %b, %1
|
||||
|
|
@ -509,10 +454,25 @@ define float @test16_unary_fneg(float %b, float %a) {
|
|||
ret float %4
|
||||
}
|
||||
|
||||
define float @test16_reassoc(float %b, float %a) {
|
||||
; CHECK-LABEL: @test16_reassoc(
|
||||
define float @test15_reassoc_nsz(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc_nsz(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc nsz float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc nsz float [[B:%.*]], [[TMP1]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc nsz float 0.000000e+00, [[A]]
|
||||
; CHECK-NEXT: [[TMP4:%.*]] = fadd reassoc nsz float [[TMP3]], [[TMP2]]
|
||||
; CHECK-NEXT: ret float [[TMP4]]
|
||||
;
|
||||
%1 = fadd reassoc nsz float %a, 1234.0
|
||||
%2 = fadd reassoc nsz float %b, %1
|
||||
%3 = fsub reassoc nsz float 0.0, %a
|
||||
%4 = fadd reassoc nsz float %2, %3
|
||||
ret float %4
|
||||
}
|
||||
|
||||
define float @test15_reassoc(float %b, float %a) {
|
||||
; CHECK-LABEL: @test15_reassoc(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd reassoc float [[A:%.*]], 1.234000e+03
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc float [[TMP1]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd reassoc float [[B:%.*]], [[TMP1]]
|
||||
; CHECK-NEXT: [[TMP3:%.*]] = fsub reassoc float 0.000000e+00, [[A]]
|
||||
; CHECK-NEXT: [[TMP4:%.*]] = fadd reassoc float [[TMP3]], [[TMP2]]
|
||||
; CHECK-NEXT: ret float [[TMP4]]
|
||||
|
|
@ -525,13 +485,17 @@ define float @test16_reassoc(float %b, float %a) {
|
|||
}
|
||||
|
||||
; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z.
|
||||
; That only works with both instcombine and reassociate passes enabled.
|
||||
; Check that reassociate is not enough.
|
||||
|
||||
define float @test17(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17(
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[E]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul fast float [[F]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
define float @test16(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float 0.000000e+00, 0.000000e+00
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[C]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[F]], 0.000000e+00
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%c = fsub fast float 0.000000e+00, %z
|
||||
%d = fmul fast float %a, %b
|
||||
|
|
@ -541,12 +505,13 @@ define float @test17(float %a, float %b, float %z) {
|
|||
ret float %g
|
||||
}
|
||||
|
||||
define float @test17_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_unary_fneg(
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[D]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[TMP1]]
|
||||
define float @test16_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float 0.000000e+00
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[A:%.*]], 1.234500e+04
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[E]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[G:%.*]] = fmul fast float [[F]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[G]]
|
||||
;
|
||||
%c = fneg fast float %z
|
||||
%d = fmul fast float %a, %b
|
||||
|
|
@ -556,8 +521,8 @@ define float @test17_unary_fneg(float %a, float %b, float %z) {
|
|||
ret float %g
|
||||
}
|
||||
|
||||
define float @test17_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_reassoc(
|
||||
define float @test16_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test16_reassoc(
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 0.000000e+00, [[Z:%.*]]
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc float [[D]], [[C]]
|
||||
|
|
@ -573,11 +538,17 @@ define float @test17_reassoc(float %a, float %b, float %z) {
|
|||
ret float %g
|
||||
}
|
||||
|
||||
define float @test18(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test18(
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[A:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
; TODO: check if we can remove:
|
||||
; - fsub fast 0, 0
|
||||
; - fadd fast x, 0
|
||||
; ... as 'fast' implies 'nsz'
|
||||
define float @test17(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fsub fast float 0.000000e+00, 0.000000e+00
|
||||
; CHECK-NEXT: [[C:%.*]] = fmul fast float [[A:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[C]], [[Z:%.*]]
|
||||
; CHECK-NEXT: [[TMP2:%.*]] = fadd fast float [[E]], 0.000000e+00
|
||||
; CHECK-NEXT: ret float [[TMP2]]
|
||||
;
|
||||
%d = fmul fast float %z, 4.000000e+01
|
||||
%c = fsub fast float 0.000000e+00, %d
|
||||
|
|
@ -586,8 +557,10 @@ define float @test18(float %a, float %b, float %z) {
|
|||
ret float %f
|
||||
}
|
||||
|
||||
define float @test18_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test18_unary_fneg(
|
||||
; TODO: check if we can remove fneg fast 0 as 'fast' implies 'nsz'
|
||||
define float @test17_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test17_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fneg fast float 0.000000e+00
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul fast float [[A:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul fast float [[E]], [[Z:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
|
|
@ -599,53 +572,13 @@ define float @test18_unary_fneg(float %a, float %b, float %z) {
|
|||
ret float %f
|
||||
}
|
||||
|
||||
define float @test18_reassoc(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test18_reassoc(
|
||||
; CHECK-NEXT: [[D:%.*]] = fmul reassoc float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[C:%.*]] = fsub reassoc float 0.000000e+00, [[D]]
|
||||
; CHECK-NEXT: [[E:%.*]] = fmul reassoc float [[C]], [[A:%.*]]
|
||||
; CHECK-NEXT: [[F:%.*]] = fsub reassoc float 0.000000e+00, [[E]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul reassoc float %z, 4.000000e+01
|
||||
%c = fsub reassoc float 0.000000e+00, %d
|
||||
%e = fmul reassoc float %a, %c
|
||||
%f = fsub reassoc float 0.000000e+00, %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
; fneg of fneg is an identity operation, so no FMF are needed to remove those instructions.
|
||||
|
||||
define float @test18_unary_fneg_no_FMF(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test18_unary_fneg_no_FMF(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul float %z, 4.000000e+01
|
||||
%c = fneg float %d
|
||||
%e = fmul float %a, %c
|
||||
%f = fneg float %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
define float @test18_reassoc_unary_fneg(float %a, float %b, float %z) {
|
||||
; CHECK-LABEL: @test18_reassoc_unary_fneg(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fmul reassoc float [[Z:%.*]], 4.000000e+01
|
||||
; CHECK-NEXT: [[F:%.*]] = fmul reassoc float [[TMP1]], [[A:%.*]]
|
||||
; CHECK-NEXT: ret float [[F]]
|
||||
;
|
||||
%d = fmul reassoc float %z, 4.000000e+01
|
||||
%c = fneg reassoc float %d
|
||||
%e = fmul reassoc float %a, %c
|
||||
%f = fneg reassoc float %e
|
||||
ret float %f
|
||||
}
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the 12 and -12 constants.
|
||||
define float @test19(float %A, float %B) {
|
||||
; CHECK-LABEL: @test19(
|
||||
; CHECK-NEXT: [[Z:%.*]] = fsub fast float [[A:%.*]], [[B:%.*]]
|
||||
; TODO: check if we can remove fadd fast x, 0 as 'fast' implies 'nsz'
|
||||
define float @test18(float %A, float %B) {
|
||||
; CHECK-LABEL: @test18(
|
||||
; CHECK-NEXT: [[B_NEG:%.*]] = fneg fast float [[B:%.*]]
|
||||
; CHECK-NEXT: [[Y:%.*]] = fadd fast float [[A:%.*]], 0.000000e+00
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd fast float [[Y]], [[B_NEG]]
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd fast float -1.200000e+01, %A
|
||||
|
|
@ -653,43 +586,3 @@ define float @test19(float %A, float %B) {
|
|||
%Z = fadd fast float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
define float @test19_reassoc(float %A, float %B) {
|
||||
; CHECK-LABEL: @test19_reassoc(
|
||||
; CHECK-NEXT: [[X:%.*]] = fadd reassoc float [[A:%.*]], -1.200000e+01
|
||||
; CHECK-NEXT: [[Y:%.*]] = fsub reassoc float [[X]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[Z:%.*]] = fadd reassoc float [[Y]], 1.200000e+01
|
||||
; CHECK-NEXT: ret float [[Z]]
|
||||
;
|
||||
%X = fadd reassoc float -1.200000e+01, %A
|
||||
%Y = fsub reassoc float %X, %B
|
||||
%Z = fadd reassoc float %Y, 1.200000e+01
|
||||
ret float %Z
|
||||
}
|
||||
|
||||
; With sub reassociation, constant folding can eliminate the uses of %a.
|
||||
define float @test20(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test20(
|
||||
; CHECK-NEXT: [[TMP1:%.*]] = fadd fast float [[B:%.*]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fneg fast float [[TMP1]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub fast float %a, %b
|
||||
%t5 = fsub fast float %t3, %c
|
||||
%t7 = fsub fast float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
define float @test20_reassoc(float %a, float %b, float %c) nounwind {
|
||||
; CHECK-LABEL: @test20_reassoc(
|
||||
; CHECK-NEXT: [[T3:%.*]] = fsub reassoc float [[A:%.*]], [[B:%.*]]
|
||||
; CHECK-NEXT: [[T5:%.*]] = fsub reassoc float [[T3]], [[C:%.*]]
|
||||
; CHECK-NEXT: [[T7:%.*]] = fsub reassoc float [[T5]], [[A]]
|
||||
; CHECK-NEXT: ret float [[T7]]
|
||||
;
|
||||
%t3 = fsub reassoc float %a, %b
|
||||
%t5 = fsub reassoc float %t3, %c
|
||||
%t7 = fsub reassoc float %t5, %a
|
||||
ret float %t7
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue