53 lines
2.3 KiB
LLVM
53 lines
2.3 KiB
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse2 | FileCheck %s
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; PR2656
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i686-apple-darwin9.4.0"
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%struct.anon = type <{ float, float }>
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@.str = internal constant [17 x i8] c"pt: %.0f, %.0f\0A\00\00" ; <[17 x i8]*> [#uses=1]
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; We can not fold either stack load into an 'xor' instruction because that
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; would change what should be a 4-byte load into a 16-byte load.
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; We can fold the 16-byte constant load into either 'xor' instruction,
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; but we do not. It has more than one use, so it gets loaded into a register.
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define void @foo(%struct.anon* byval %p) nounwind {
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; CHECK-LABEL: foo:
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; CHECK: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
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; CHECK-NEXT: movss {{.*#+}} xmm1 = mem[0],zero,zero,zero
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; CHECK-NEXT: movaps {{.*#+}} xmm2 = [2147483648,2147483648,2147483648,2147483648]
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; CHECK-NEXT: xorps %xmm2, %xmm0
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; CHECK-NEXT: cvtss2sd %xmm0, %xmm0
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; CHECK-NEXT: xorps %xmm2, %xmm1
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entry:
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%tmp = getelementptr %struct.anon, %struct.anon* %p, i32 0, i32 0 ; <float*> [#uses=1]
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%tmp1 = load float, float* %tmp ; <float> [#uses=1]
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%tmp2 = getelementptr %struct.anon, %struct.anon* %p, i32 0, i32 1 ; <float*> [#uses=1]
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%tmp3 = load float, float* %tmp2 ; <float> [#uses=1]
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%neg = fsub float -0.000000e+00, %tmp1 ; <float> [#uses=1]
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%conv = fpext float %neg to double ; <double> [#uses=1]
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%neg4 = fsub float -0.000000e+00, %tmp3 ; <float> [#uses=1]
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%conv5 = fpext float %neg4 to double ; <double> [#uses=1]
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%call = call i32 (...) @printf( i8* getelementptr ([17 x i8], [17 x i8]* @.str, i32 0, i32 0), double %conv, double %conv5 ) ; <i32> [#uses=0]
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ret void
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}
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declare i32 @printf(...)
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; We can not fold the load from the stack into the 'and' instruction because
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; that changes an 8-byte load into a 16-byte load (illegal memory access).
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; We can fold the load of the constant because it is a 16-byte vector constant.
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define double @PR22371(double %x) {
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; CHECK-LABEL: PR22371:
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; CHECK: movsd 16(%esp), %xmm0
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; CHECK-NEXT: andpd LCPI1_0, %xmm0
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; CHECK-NEXT: movlpd %xmm0, (%esp)
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%call = tail call double @fabs(double %x) #0
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ret double %call
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}
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declare double @fabs(double) #0
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attributes #0 = { readnone }
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