292077072e
With the addition of the `willreturn` attribute, functions that may not return (e.g. due to an infinite loop) are well defined, if they are not marked as `willreturn`. This patch updates `wouldInstructionBeTriviallyDead` to not consider calls that may not return as dead. This patch still provides an escape hatch for intrinsics, which are still assumed as willreturn unconditionally. It will be removed once all intrinsics definitions have been reviewed and updated. Reviewed By: jdoerfert Differential Revision: https://reviews.llvm.org/D94106
110 lines
2.8 KiB
LLVM
110 lines
2.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -early-cse -earlycse-debug-hash < %s | FileCheck %s
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declare float @nearbyintf(float) #0
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declare float @llvm.nearbyint.f32(float)
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declare double @nearbyint(double) #0
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declare double @llvm.nearbyint.f64(double)
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declare float @rintf(float) #0
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declare float @llvm.rint.f32(float)
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declare double @rint(double) #0
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declare double @llvm.rint.f64(double)
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define float @constant_fold_rint_f32_01() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_01(
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; CHECK-NEXT: ret float 1.000000e+00
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;
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%x = call float @nearbyintf(float 1.25) #0
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ret float %x
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}
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define float @constant_fold_rint_f32_02() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_02(
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; CHECK-NEXT: ret float -1.000000e+00
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;
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%x = call float @llvm.nearbyint.f32(float -1.25) #0
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ret float %x
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}
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define float @constant_fold_rint_f32_03() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_03(
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; CHECK-NEXT: ret float 2.000000e+00
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;
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%x = call float @rintf(float 1.5) #0
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ret float %x
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}
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define float @constant_fold_rint_f32_04() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_04(
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; CHECK-NEXT: ret float -2.000000e+00
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;
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%x = call float @llvm.rint.f32(float -1.5) #0
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ret float %x
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}
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define float @constant_fold_rint_f32_05() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_05(
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; CHECK-NEXT: ret float 3.000000e+00
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;
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%x = call float @nearbyintf(float 2.75) #0
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ret float %x
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}
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define float @constant_fold_rint_f32_06() #0 {
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; CHECK-LABEL: @constant_fold_rint_f32_06(
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; CHECK-NEXT: ret float -3.000000e+00
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;
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%x = call float @llvm.nearbyint.f32(float -2.75) #0
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ret float %x
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}
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define double @constant_fold_rint_f64_01() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_01(
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; CHECK-NEXT: ret double 1.000000e+00
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;
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%x = call double @rint(double 1.3) #0
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ret double %x
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}
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define double @constant_fold_rint_f64_02() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_02(
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; CHECK-NEXT: ret double -1.000000e+00
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;
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%x = call double @llvm.rint.f64(double -1.3) #0
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ret double %x
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}
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define double @constant_fold_rint_f64_03() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_03(
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; CHECK-NEXT: ret double 2.000000e+00
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;
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%x = call double @nearbyint(double 1.5) #0
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ret double %x
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}
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define double @constant_fold_rint_f64_04() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_04(
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; CHECK-NEXT: ret double -2.000000e+00
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;
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%x = call double @llvm.nearbyint.f64(double -1.5) #0
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ret double %x
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}
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define double @constant_fold_rint_f64_05() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_05(
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; CHECK-NEXT: ret double 3.000000e+00
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;
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%x = call double @rint(double 2.7) #0
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ret double %x
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}
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define double @constant_fold_rint_f64_06() #0 {
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; CHECK-LABEL: @constant_fold_rint_f64_06(
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; CHECK-NEXT: ret double -3.000000e+00
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;
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%x = call double @llvm.rint.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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