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; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
; rdar://7251832
; SimplifyLibcalls should optimize pow(x, 0.5) to sqrt plus code to handle
; special cases. The readonly attribute on the call should be preserved.
; CHECK: define float @foo(float %x) nounwind {
; CHECK: %sqrtf = call float @sqrtf(float %x) nounwind readonly
; CHECK: %fabsf = call float @fabsf(float %sqrtf) nounwind readonly
; CHECK: %1 = fcmp oeq float %x, 0xFFF0000000000000
; CHECK: %retval = select i1 %1, float 0x7FF0000000000000, float %fabsf
; CHECK: ret float %retval
define float @foo(float %x) nounwind {
%retval = call float @powf(float %x, float 0.5)
ret float %retval
}
; CHECK: define double @doo(double %x) nounwind {
; CHECK: %sqrt = call double @sqrt(double %x) nounwind readonly
; CHECK: %fabs = call double @fabs(double %sqrt) nounwind readonly
; CHECK: %1 = fcmp oeq double %x, 0xFFF0000000000000
; CHECK: %retval = select i1 %1, double 0x7FF0000000000000, double %fabs
; CHECK: ret double %retval
; CHECK: }
define double @doo(double %x) nounwind {
%retval = call double @pow(double %x, double 0.5)
ret double %retval
}
declare float @powf(float, float) nounwind readonly
declare double @pow(double, double) nounwind readonly
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