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79cb840136
typically faster then doing a general pow. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82819 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
1.2 KiB
LLVM
34 lines
1.2 KiB
LLVM
; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
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; rdar://7235530
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; SimplifyLibcalls should optimize pow(x, 0.5) to sqrt plus code to handle
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; special cases. The readonly attribute on the call should be preserved.
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; CHECK: define float @foo(float %x) nounwind {
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; CHECK: %sqrtf = call float @sqrtf(float %x) readonly
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; CHECK: %fabsf = call float @fabsf(float %sqrtf) readonly
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; CHECK: %tmp = fcmp oeq float %x, 0xFFF0000000000000
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; CHECK: %tmp1 = select i1 %tmp, float 0x7FF0000000000000, float %fabsf
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; CHECK: ret float %tmp1
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define float @foo(float %x) nounwind {
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%retval = call float @powf(float %x, float 0.5) readonly
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ret float %retval
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}
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; CHECK: define double @doo(double %x) nounwind {
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; CHECK: %sqrt = call double @sqrt(double %x) readonly
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; CHECK: %fabs = call double @fabs(double %sqrt) readonly
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; CHECK: %tmp = fcmp oeq double %x, 0xFFF0000000000000
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; CHECK: %tmp1 = select i1 %tmp, double 0x7FF0000000000000, double %fabs
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; CHECK: ret double %tmp1
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; CHECK: }
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define double @doo(double %x) nounwind {
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%retval = call double @pow(double %x, double 0.5) readonly
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ret double %retval
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}
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declare float @powf(float, float) nounwind readonly
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declare double @pow(double, double) nounwind readonly
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