When folding a load into a return of SSE value, check the chain to

ensure the memory location has not been clobbered.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25861 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 1a60368bbb28822bda5c8088096eeda9881863a2..dce781d3a8b636613fdd815be61604f95037ba7f 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1912,10 +1912,11 @@ SDOperand X86TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
         Ops.push_back(Op.getOperand(1));
         Copy = DAG.getNode(X86ISD::FP_SET_RESULT, Tys, Ops);
       } else {
-        SDOperand MemLoc, Chain;
+        SDOperand MemLoc;
+        SDOperand Chain = Op.getOperand(0);
         SDOperand Value = Op.getOperand(1);
 
-        if (Value.getOpcode() == ISD::LOAD) {
+        if (Value.getOpcode() == ISD::LOAD && Chain == Value.getOperand(0)) {
           Chain  = Value.getOperand(0);
           MemLoc = Value.getOperand(1);
         } else {