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[InstSimplify] add fdiv x/1.0 test and update checks; NFC 

llvm-svn: 289098
This commit is contained in:
Sanjay Patel 2016-12-08 20:23:56 +00:00
parent bf4ad1d63d
commit 2580c95dc1
1 changed files with 25 additions and 8 deletions
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33
llvm/test/Transforms/InstSimplify/floating-point-arithmetic.ll
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@ -1,10 +1,10 @@
; NOTE: Assertions have been autogenerated by update_test_checks.py
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; fsub -0.0, (fsub -0.0, X) ==> X
define float @fsub_-0_-0_x(float %a) {
; CHECK-LABEL: @fsub_-0_-0_x(
; CHECK: ret float %a
; CHECK-NEXT: ret float %a
;
%t1 = fsub float -0.0, %a
%ret = fsub float -0.0, %t1
@ -14,7 +14,7 @@ define float @fsub_-0_-0_x(float %a) {
; fsub 0.0, (fsub -0.0, X) != X
define float @fsub_0_-0_x(float %a) {
; CHECK-LABEL: @fsub_0_-0_x(
; CHECK: [[T1:%.*]] = fsub float 0.000000e+00, %a
; CHECK-NEXT: [[T1:%.*]] = fsub float 0.000000e+00, %a
; CHECK-NEXT: [[RET:%.*]] = fsub float -0.000000e+00, [[T1]]
; CHECK-NEXT: ret float [[RET]]
;
@ -26,7 +26,7 @@ define float @fsub_0_-0_x(float %a) {
; fsub -0.0, (fsub 0.0, X) != X
define float @fsub_-0_0_x(float %a) {
; CHECK-LABEL: @fsub_-0_0_x(
; CHECK: [[T1:%.*]] = fsub float -0.000000e+00, %a
; CHECK-NEXT: [[T1:%.*]] = fsub float -0.000000e+00, %a
; CHECK-NEXT: [[RET:%.*]] = fsub float 0.000000e+00, [[T1]]
; CHECK-NEXT: ret float [[RET]]
;
@ -38,7 +38,7 @@ define float @fsub_-0_0_x(float %a) {
; fsub X, 0 ==> X
define float @fsub_x_0(float %a) {
; CHECK-LABEL: @fsub_x_0(
; CHECK: ret float %a
; CHECK-NEXT: ret float %a
;
%ret = fsub float %a, 0.0
ret float %ret
@ -47,7 +47,7 @@ define float @fsub_x_0(float %a) {
; fadd X, -0 ==> X
define float @fadd_x_n0(float %a) {
; CHECK-LABEL: @fadd_x_n0(
; CHECK: ret float %a
; CHECK-NEXT: ret float %a
;
%ret = fadd float %a, -0.0
ret float %ret
@ -56,12 +56,23 @@ define float @fadd_x_n0(float %a) {
; fmul X, 1.0 ==> X
define double @fmul_X_1(double %a) {
; CHECK-LABEL: @fmul_X_1(
; CHECK: ret double %a
; CHECK-NEXT: ret double %a
;
%b = fmul double 1.000000e+00, %a
ret double %b
}
; FIXME:
; fdiv X, 1.0 ==> X
define float @fdiv_x_1(float %a) {
; CHECK-LABEL: @fdiv_x_1(
; CHECK-NEXT: [[RET:%.*]] = fdiv float %a, 1.000000e+00
; CHECK-NEXT: ret float [[RET]]
;
%ret = fdiv float %a, 1.0
ret float %ret
}
; We can't optimize away the fadd in this test because the input
; value to the function and subsequently to the fadd may be -0.0.
; In that one special case, the result of the fadd should be +0.0
@ -75,7 +86,13 @@ declare float @sqrtf(float)
define float @PR22688(float %x) {
; CHECK-LABEL: @PR22688(
; CHECK: [[TMP7:%.*]] = fadd float {{%.*}}, 0.000000e+00
; CHECK-NEXT: [[TMP1:%.*]] = call float @sqrtf(float %x)
; CHECK-NEXT: [[TMP2:%.*]] = call float @sqrtf(float [[TMP1]])
; CHECK-NEXT: [[TMP3:%.*]] = call float @sqrtf(float [[TMP2]])
; CHECK-NEXT: [[TMP4:%.*]] = call float @sqrtf(float [[TMP3]])
; CHECK-NEXT: [[TMP5:%.*]] = call float @sqrtf(float [[TMP4]])
; CHECK-NEXT: [[TMP6:%.*]] = call float @sqrtf(float [[TMP5]])
; CHECK-NEXT: [[TMP7:%.*]] = fadd float [[TMP6]], 0.000000e+00
; CHECK-NEXT: ret float [[TMP7]]
;
%1 = call float @sqrtf(float %x)