Infer alignment of loads and increase their alignment when we can tell they are
from the stack. This allows us to compile stack-align.ll to:
_test:
movsd LCPI1_0, %xmm0
movapd %xmm0, %xmm1
*** andpd 4(%esp), %xmm1
andpd _G, %xmm0
addsd %xmm1, %xmm0
movl 20(%esp), %eax
movsd %xmm0, (%eax)
ret
instead of:
_test:
movsd LCPI1_0, %xmm0
** movsd 4(%esp), %xmm1
** andpd %xmm0, %xmm1
andpd _G, %xmm0
addsd %xmm1, %xmm0
movl 20(%esp), %eax
movsd %xmm0, (%eax)
ret
llvm-svn: 46401
2008-01-26 20:45:50 +01:00
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; RUN: llvm-as < %s | llc -relocation-model=static -mcpu=yonah | grep {andpd.*4(%esp), %xmm}
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; The double argument is at 4(esp) which is 16-byte aligned, allowing us to
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; fold the load into the andpd.
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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-darwin8"
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@G = external global double
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define void @test({ double, double }* byval %z, double* %P) {
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entry:
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%tmp = getelementptr { double, double }* %z, i32 0, i32 0 ; <double*> [#uses=1]
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%tmp1 = load double* %tmp, align 8 ; <double> [#uses=1]
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%tmp2 = tail call double @fabs( double %tmp1 ) ; <double> [#uses=1]
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%tmp3 = load double* @G, align 16 ; <double> [#uses=1]
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%tmp4 = tail call double @fabs( double %tmp3 ) ; <double> [#uses=1]
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2009-06-05 00:49:04 +02:00
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%tmp6 = fadd double %tmp4, %tmp2 ; <double> [#uses=1]
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Infer alignment of loads and increase their alignment when we can tell they are
from the stack. This allows us to compile stack-align.ll to:
_test:
movsd LCPI1_0, %xmm0
movapd %xmm0, %xmm1
*** andpd 4(%esp), %xmm1
andpd _G, %xmm0
addsd %xmm1, %xmm0
movl 20(%esp), %eax
movsd %xmm0, (%eax)
ret
instead of:
_test:
movsd LCPI1_0, %xmm0
** movsd 4(%esp), %xmm1
** andpd %xmm0, %xmm1
andpd _G, %xmm0
addsd %xmm1, %xmm0
movl 20(%esp), %eax
movsd %xmm0, (%eax)
ret
llvm-svn: 46401
2008-01-26 20:45:50 +01:00
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store double %tmp6, double* %P, align 8
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ret void
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}
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declare double @fabs(double)
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