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Fixes a bug in the DAGCombiner. LoadSDNodes have two values (data, chain).

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If there is a store after the load node, then there is a chain, which means
that there is another user. Thus, asking hasOneUser would fail. Instead we
ask hasNUsesOfValue on the 'data' value.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131183 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2011-05-11 14:40:50 +00:00
parent 104e99256d
commit 42febc6e99
5 changed files with 29 additions and 12 deletions
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13
test/CodeGen/X86/2011-05-09-loaduse.ll Normal file
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; RUN: llc < %s -march=x86 -mcpu=corei7 | FileCheck %s
;CHECK: test
;CHECK-not: pshufd
;CHECK: ret
define float @test(<4 x float>* %A) nounwind {
entry:
%T = load <4 x float>* %A
%R = extractelement <4 x float> %T, i32 3
store <4 x float><float 0.0, float 0.0, float 0.0, float 0.0>, <4 x float>* %A
ret float %R
}