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Simplify extract element of a scalar to vector.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62383 91177308-0d34-0410-b5e6-96231b3b80d8
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Mon P Wang
2009-01-17 00:07:25 +00:00
parent de62aeaec4
commit 7ac9cdfc99
2 changed files with 26 additions and 5 deletions
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13
test/CodeGen/X86/scalar-extract.ll Normal file
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; RUN: llvm-as < %s | llc -march=x86 -mattr=+mmx -o %t -f
; RUN: not grep movq %t
; Check that widening doesn't introduce a mmx register in this case when
; a simple load/store would suffice.
define void @foo(<2 x i16>* %A, <2 x i16>* %B) {
entry:
%tmp1 = load <2 x i16>* %A ; <<2 x i16>> [#uses=1]
store <2 x i16> %tmp1, <2 x i16>* %B
ret void
}