forked from OSchip/llvm-project
[InstCombine] More usub_sat tests. NFC.
This commit is contained in:
David Green
parent
3f4b70c79e
commit
a46b959ebd
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@ -1,4 +1,4 @@
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; RUN: opt -instcombine -S < %s | FileCheck %s --dump-input-on-failure
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; RUN: opt -instcombine -S < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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@ -5,6 +5,8 @@
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; usub.sat() intrinsics is tested here.
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declare void @use(i64)
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declare void @usei32(i32)
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declare void @usei1(i1)
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; (a > b) ? a - b : 0 -> usub.sat(a, b)
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@ -32,6 +34,52 @@ define i64 @max_sub_uge(i64 %a, i64 %b) {
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ret i64 %sel
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}
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define i64 @max_sub_uge_extrause1(i64 %a, i64 %b) {
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; CHECK-LABEL: @max_sub_uge_extrause1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[A]], [[B]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i64 0, i64 [[SUB]]
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; CHECK-NEXT: call void @use(i64 [[SUB]])
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; CHECK-NEXT: ret i64 [[SEL]]
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;
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%cmp = icmp uge i64 %a, %b
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%sub = sub i64 %a, %b
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%sel = select i1 %cmp, i64 %sub ,i64 0
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call void @use(i64 %sub)
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ret i64 %sel
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}
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define i64 @max_sub_uge_extrause2(i64 %a, i64 %b) {
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; CHECK-LABEL: @max_sub_uge_extrause2(
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; CHECK-NEXT: [[CMP:%.*]] = icmp uge i64 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = call i64 @llvm.usub.sat.i64(i64 [[A]], i64 [[B]])
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; CHECK-NEXT: call void @usei1(i1 [[CMP]])
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; CHECK-NEXT: ret i64 [[TMP1]]
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;
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%cmp = icmp uge i64 %a, %b
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%sub = sub i64 %a, %b
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%sel = select i1 %cmp, i64 %sub ,i64 0
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call void @usei1(i1 %cmp)
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ret i64 %sel
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}
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define i64 @max_sub_uge_extrause3(i64 %a, i64 %b) {
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; CHECK-LABEL: @max_sub_uge_extrause3(
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; CHECK-NEXT: [[CMP:%.*]] = icmp uge i64 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[A]], [[B]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i64 [[SUB]], i64 0
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; CHECK-NEXT: call void @use(i64 [[SUB]])
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; CHECK-NEXT: call void @usei1(i1 [[CMP]])
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; CHECK-NEXT: ret i64 [[SEL]]
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;
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%cmp = icmp uge i64 %a, %b
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%sub = sub i64 %a, %b
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%sel = select i1 %cmp, i64 %sub ,i64 0
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call void @use(i64 %sub)
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call void @usei1(i1 %cmp)
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ret i64 %sel
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}
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; Again, with vectors:
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; (a > b) ? a - b : 0 -> usub.sat(a, b)
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@ -140,6 +188,53 @@ define i64 @neg_max_sub_ugt_sel_swapped(i64 %a, i64 %b) {
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ret i64 %sel
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}
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define i64 @neg_max_sub_ugt_sel_swapped_extrause1(i64 %a, i64 %b) {
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; CHECK-LABEL: @neg_max_sub_ugt_sel_swapped_extrause1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[TMP1:%.*]] = call i64 @llvm.usub.sat.i64(i64 [[A]], i64 [[B]])
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; CHECK-NEXT: [[TMP2:%.*]] = sub i64 0, [[TMP1]]
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; CHECK-NEXT: call void @usei1(i1 [[CMP]])
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; CHECK-NEXT: ret i64 [[TMP2]]
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;
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%cmp = icmp ugt i64 %b, %a
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%sub = sub i64 %b, %a
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%sel = select i1 %cmp, i64 0 ,i64 %sub
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call void @usei1(i1 %cmp)
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ret i64 %sel
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}
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define i64 @neg_max_sub_ugt_sel_swapped_extrause2(i64 %a, i64 %b) {
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; CHECK-LABEL: @neg_max_sub_ugt_sel_swapped_extrause2(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[B]], [[A]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i64 0, i64 [[SUB]]
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; CHECK-NEXT: call void @use(i64 [[SUB]])
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; CHECK-NEXT: ret i64 [[SEL]]
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;
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%cmp = icmp ugt i64 %b, %a
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%sub = sub i64 %b, %a
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%sel = select i1 %cmp, i64 0 ,i64 %sub
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call void @use(i64 %sub)
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ret i64 %sel
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}
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define i64 @neg_max_sub_ugt_sel_swapped_extrause3(i64 %a, i64 %b) {
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; CHECK-LABEL: @neg_max_sub_ugt_sel_swapped_extrause3(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i64 [[B:%.*]], [[A:%.*]]
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; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[B]], [[A]]
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i64 0, i64 [[SUB]]
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; CHECK-NEXT: call void @use(i64 [[SUB]])
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; CHECK-NEXT: call void @usei1(i1 [[CMP]])
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; CHECK-NEXT: ret i64 [[SEL]]
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;
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%cmp = icmp ugt i64 %b, %a
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%sub = sub i64 %b, %a
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%sel = select i1 %cmp, i64 0 ,i64 %sub
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call void @use(i64 %sub)
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call void @usei1(i1 %cmp)
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ret i64 %sel
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}
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; ((a < b) ? 0 : b - a) -> -usub.sat(a, b)
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define i64 @neg_max_sub_ult_sel_swapped(i64 %a, i64 %b) {
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@ -158,3 +253,207 @@ define i64 @neg_max_sub_ult_sel_swapped(i64 %a, i64 %b) {
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ret i64 %sel
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}
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define i32 @max_sub_ugt_c1(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A:%.*]], 1
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -1
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 1
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%sub = add i32 %a, -1
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%sel = select i1 %cmp, i32 %sub ,i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c01(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c01(
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -1
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 0, i32 [[SUB]]
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 0
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%sub = add i32 %a, -1
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%sel = select i1 %cmp, i32 %sub ,i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c10(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c10(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A:%.*]], 10
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -10
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 10
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%sub = add i32 %a, -10
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c910(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c910(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A:%.*]], 9
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -10
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 9
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%sub = add i32 %a, -10
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c1110(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c1110(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A:%.*]], 11
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -10
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 11
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%sub = add i32 %a, -10
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c0(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c0(
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; CHECK-NEXT: ret i32 0
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;
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%cmp = icmp ugt i32 %a, -1
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%sub = add i32 %a, 0
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_cmiss(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_cmiss(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ugt i32 [[A:%.*]], 1
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 %a, 1
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ult_c1(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c1(
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[SEL:%.*]] = sext i1 [[CMP]] to i32
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 1
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%sub = add i32 %a, -1
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ult_c2(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c2(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 2
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 2
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ult_c2_oneuseicmp(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c2_oneuseicmp(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 2
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: call void @usei1(i1 [[CMP]])
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 2
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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call void @usei1(i1 %cmp)
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ret i32 %sel
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}
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define i32 @max_sub_ult_c2_oneusesub(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c2_oneusesub(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 2
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: call void @usei32(i32 [[SUB]])
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 2
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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call void @usei32(i32 %sub)
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ret i32 %sel
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}
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define i32 @max_sub_ult_c32(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c32(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 3
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 3
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ugt_c32(i32 %a) {
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; CHECK-LABEL: @max_sub_ugt_c32(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 3
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ugt i32 3, %a
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_uge_c32(i32 %a) {
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; CHECK-LABEL: @max_sub_uge_c32(
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[A:%.*]], 3
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; CHECK-NEXT: [[SUB:%.*]] = add i32 [[A]], -2
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 [[SUB]], i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp uge i32 2, %a
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ult_c12(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c12(
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[CMP]], i32 -2, i32 0
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; CHECK-NEXT: ret i32 [[SEL]]
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;
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%cmp = icmp ult i32 %a, 1
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%sub = add i32 %a, -2
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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define i32 @max_sub_ult_c0(i32 %a) {
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; CHECK-LABEL: @max_sub_ult_c0(
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; CHECK-NEXT: ret i32 0
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;
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%cmp = icmp ult i32 %a, 0
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%sub = add i32 %a, -1
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%sel = select i1 %cmp, i32 %sub, i32 0
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ret i32 %sel
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}
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