352b901828
Basically identical to nearbyint and rint, which we already treat as rounding to nearest with ties to even during constant folding.
158 lines
4.6 KiB
LLVM
158 lines
4.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
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declare float @roundevenf(float) #0
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declare float @llvm.roundeven.f32(float)
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declare double @roundeven(double) #0
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declare double @llvm.roundeven.f64(double)
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define float @constant_fold_roundeven_f32_01() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_01(
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; CHECK-SAME: ) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: ret float 1.000000e+00
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;
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%x = call float @roundevenf(float 1.25) #0
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ret float %x
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}
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define float @constant_fold_roundeven_f32_02() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_02(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float -1.000000e+00
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;
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%x = call float @llvm.roundeven.f32(float -1.25) #0
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ret float %x
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}
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; roundeven rounds ties to even, so 1.5 -> 2.0 (nearest even)
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define float @constant_fold_roundeven_f32_03() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_03(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float 2.000000e+00
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;
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%x = call float @roundevenf(float 1.5) #0
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ret float %x
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}
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; roundeven rounds ties to even, so -1.5 -> -2.0 (nearest even)
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define float @constant_fold_roundeven_f32_04() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_04(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float -2.000000e+00
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;
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%x = call float @llvm.roundeven.f32(float -1.5) #0
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ret float %x
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}
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; roundeven rounds ties to even, so 2.5 -> 2.0 (nearest even)
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define float @constant_fold_roundeven_f32_05() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_05(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float 2.000000e+00
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;
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%x = call float @roundevenf(float 2.5) #0
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ret float %x
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}
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; roundeven rounds ties to even, so -2.5 -> -2.0 (nearest even)
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define float @constant_fold_roundeven_f32_06() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_06(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float -2.000000e+00
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;
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%x = call float @llvm.roundeven.f32(float -2.5) #0
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ret float %x
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}
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define float @constant_fold_roundeven_f32_07() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_07(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float 3.000000e+00
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;
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%x = call float @roundevenf(float 2.75) #0
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ret float %x
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}
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define float @constant_fold_roundeven_f32_08() #0 {
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; CHECK-LABEL: define float @constant_fold_roundeven_f32_08(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret float -3.000000e+00
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;
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%x = call float @llvm.roundeven.f32(float -2.75) #0
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ret float %x
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}
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define double @constant_fold_roundeven_f64_01() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_01(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double 1.000000e+00
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;
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%x = call double @roundeven(double 1.3) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_02() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_02(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double -1.000000e+00
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;
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%x = call double @llvm.roundeven.f64(double -1.3) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_03() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_03(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double 2.000000e+00
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;
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%x = call double @roundeven(double 1.5) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_04() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_04(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double -2.000000e+00
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;
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%x = call double @llvm.roundeven.f64(double -1.5) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_05() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_05(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double 2.000000e+00
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;
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%x = call double @roundeven(double 2.5) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_06() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_06(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double -2.000000e+00
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;
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%x = call double @llvm.roundeven.f64(double -2.5) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_07() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_07(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double 3.000000e+00
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;
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%x = call double @roundeven(double 2.7) #0
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ret double %x
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}
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define double @constant_fold_roundeven_f64_08() #0 {
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; CHECK-LABEL: define double @constant_fold_roundeven_f64_08(
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; CHECK-SAME: ) #[[ATTR0]] {
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; CHECK-NEXT: ret double -3.000000e+00
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;
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%x = call double @llvm.roundeven.f64(double -2.7) #0
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ret double %x
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}
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attributes #0 = { nounwind readnone willreturn }
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