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Fix a tokenfactor node to use the load chain rather than the

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load value. This fixes PR2177.

llvm-svn: 48932
This commit is contained in:
Dan Gohman 2008-03-28 23:45:16 +00:00
parent 10d0aba260
commit 227e702cae
2 changed files with 36 additions and 1 deletions
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2
lib/Target/X86/X86ISelLowering.cpp
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@ -6021,7 +6021,7 @@ static SDOperand PerformSTORECombine(StoreSDNode *St, SelectionDAG &DAG,
Ld->getAlignment());
SDOperand NewChain = NewLd.getValue(1);
if (TokenFactorIndex != -1) {
Ops.push_back(NewLd);
Ops.push_back(NewChain);
NewChain = DAG.getNode(ISD::TokenFactor, MVT::Other, &Ops[0],
Ops.size());
}

35
test/CodeGen/X86/pr2177.ll Normal file
View File

@ -0,0 +1,35 @@
; RUN: llvm-as < %s | llc
; PR2177
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-apple-darwin9.1.0"
%struct.S2259 = type { <4 x i16>, i8, i64 }
define void @check2259va(i32 %z, ...) {
entry:
br i1 false, label %bb5, label %return
bb5: ; preds = %entry
switch i32 0, label %bb155 [
i32 16, label %bb10
i32 17, label %bb118
i32 18, label %bb54
i32 32, label %bb118
i32 33, label %bb118
i32 36, label %bb118
]
bb10: ; preds = %bb5
ret void
bb54: ; preds = %bb5
ret void
bb118: ; preds = %bb5, %bb5, %bb5, %bb5
%tmp125 = load i8** null, align 8 ; <i8*> [#uses=1]
%tmp125126 = bitcast i8* %tmp125 to %struct.S2259* ; <%struct.S2259*> [#uses=1]
%tmp128 = getelementptr %struct.S2259* %tmp125126, i32 0, i32 0 ; <<4 x i16>*> [#uses=1]
%tmp129 = load <4 x i16>* %tmp128, align 8 ; <<4 x i16>> [#uses=1]
store <4 x i16> %tmp129, <4 x i16>* null, align 8
ret void
bb155: ; preds = %bb5
ret void
return: ; preds = %entry
ret void
}