derek.holloway
7502bf64a4
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45 lines
1.4 KiB
LLVM
45 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; Check that we skip transformations if the attribute unsafe-fp-math
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; is not set.
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define float @mysqrt(float %x, float %y) #0 {
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; CHECK-LABEL: @mysqrt(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[MUL:%.*]] = fmul fast float [[X:%.*]], [[X]]
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; CHECK-NEXT: [[TMP0:%.*]] = call float @llvm.sqrt.f32(float [[MUL]])
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; CHECK-NEXT: ret float [[TMP0]]
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;
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entry:
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%x.addr = alloca float, align 4
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%y.addr = alloca float, align 4
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store float %x, ptr %x.addr, align 4
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store float %y, ptr %y.addr, align 4
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%0 = load float, ptr %x.addr, align 4
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%1 = load float, ptr %x.addr, align 4
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%mul = fmul fast float %0, %1
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%2 = call float @llvm.sqrt.f32(float %mul)
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ret float %2
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}
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declare float @llvm.sqrt.f32(float) #1
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; The call below is to a function called "sqrtf", but its type is double.
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; Assume it is a user function rather than a libm function, and so don't
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; transform it.
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define double @fake_sqrt(double %a, double %b) {
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; CHECK-LABEL: @fake_sqrt(
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; CHECK-NEXT: [[C:%.*]] = fmul fast double [[A:%.*]], [[A]]
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; CHECK-NEXT: [[E:%.*]] = call fast double @sqrtf(double [[C]]) #[[ATTR1:[0-9]+]]
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; CHECK-NEXT: ret double [[E]]
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;
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%c = fmul fast double %a, %a
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%e = call fast double @sqrtf(double %c) readnone
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ret double %e
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}
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; Standard sqrtf takes and returns float. The following is not it.
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declare double @sqrtf(double) readnone
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