Do not use the stack pointer directly, issue a copyfromreg instead. Otherwise we can end up with something like ADD32ri %esp, x which two-address pass won't like.

llvm-svn: 45798

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index bd598e277bc..a7cf6cf8ca2 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -1332,7 +1332,7 @@ SDOperand X86TargetLowering::LowerCALL(SDOperand Op, SelectionDAG &DAG) {
     } else {
       assert(VA.isMemLoc());
       if (StackPtr.Val == 0)
-        StackPtr = DAG.getRegister(getStackPtrReg(), getPointerTy());
+        StackPtr = DAG.getCopyFromReg(Chain, X86StackPtr, getPointerTy());
 
       MemOpChains.push_back(LowerMemOpCallTo(Op, DAG, StackPtr, VA, Chain,
                                              Arg));