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870b80722f
Look for situations like this: %reg1024<def> = MOV r1 %reg1025<def> = MOV r0 %reg1026<def> = ADD %reg1024, %reg1025 r0 = MOV %reg1026 Commute the ADD to hopefully eliminate an otherwise unavoidable copy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65752 91177308-0d34-0410-b5e6-96231b3b80d8
16 lines
729 B
LLVM
16 lines
729 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 -stats |& \
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; RUN: grep {twoaddrinstr} | grep {Number of instructions aggressively commuted}
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; rdar://6480363
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target triple = "i386-apple-darwin9.6"
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define <2 x double> @t(<2 x double> %A, <2 x double> %B, <2 x double> %C) nounwind readnone {
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entry:
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%tmp.i3 = bitcast <2 x double> %B to <2 x i64> ; <<2 x i64>> [#uses=1]
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%tmp2.i = or <2 x i64> %tmp.i3, <i64 4607632778762754458, i64 4607632778762754458> ; <<2 x i64>> [#uses=1]
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%tmp3.i = bitcast <2 x i64> %tmp2.i to <2 x double> ; <<2 x double>> [#uses=1]
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%tmp.i2 = add <2 x double> %tmp3.i, %A ; <<2 x double>> [#uses=1]
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%tmp.i = add <2 x double> %tmp.i2, %C ; <<2 x double>> [#uses=1]
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ret <2 x double> %tmp.i
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}
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