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79076fdf2a
us to compile:
double test(double X) {
return copysign(0.0, X);
}
into:
_test:
andpd LCPI1_0(%rip), %xmm0
ret
instead of:
_test:
pxor %xmm1, %xmm1
andpd LCPI1_0(%rip), %xmm1
movapd %xmm0, %xmm2
andpd LCPI1_1(%rip), %xmm2
movapd %xmm1, %xmm0
orpd %xmm2, %xmm0
ret
llvm-svn: 46344
15 lines
526 B
LLVM
15 lines
526 B
LLVM
; RUN: llvm-as < %s | llc | not grep orpd
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; RUN: llvm-as < %s | llc | grep andpd | count 1
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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target triple = "x86_64-apple-darwin8"
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define double @test(double %X) nounwind {
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entry:
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%tmp2 = tail call double @copysign( double 0.000000e+00, double %X ) nounwind readnone ; <double> [#uses=1]
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ret double %tmp2
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}
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declare double @copysign(double, double) nounwind readnone
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