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pcmpeqd and friends are Commutable.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106886 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-06-25 21:05:35 +00:00
parent ee278437e6
commit ca5b8553ea
2 changed files with 23 additions and 3 deletions
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test/CodeGen/X86/sse-commute.ll
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; RUN: llc -march=x86-64 < %s | FileCheck %s
; Commute the comparison to avoid a move.
; PR7500.
; CHECK: a:
; CHECK-NOT: mov
; CHECK: pcmpeqd
define <2 x double> @a(<2 x double>, <2 x double>) nounwind readnone {
entry:
%tmp6 = bitcast <2 x double> %0 to <4 x i32> ; <<4 x i32>> [#uses=2]
%tmp4 = bitcast <2 x double> %1 to <4 x i32> ; <<4 x i32>> [#uses=1]
%cmp = icmp eq <4 x i32> %tmp6, %tmp4 ; <<4 x i1>> [#uses=1]
%sext = sext <4 x i1> %cmp to <4 x i32> ; <<4 x i32>> [#uses=1]
%and = and <4 x i32> %tmp6, %sext ; <<4 x i32>> [#uses=1]
%tmp8 = bitcast <4 x i32> %and to <2 x double> ; <<2 x double>> [#uses=1]
ret <2 x double> %tmp8
}