use ESP directly, not a copy of ESP into some other register for fastcc calls

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25584 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index c83e6d0..5a7b764 100644 (file)
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -923,8 +923,7 @@ X86TargetLowering::LowerFastCCCallTo(SDOperand Chain, const Type *RetTy,
 
   // Arguments go on the stack in reverse order, as specified by the ABI.
   unsigned ArgOffset = 0;
-  SDOperand StackPtr = DAG.getCopyFromReg(DAG.getEntryNode(),
-                                          X86::ESP, MVT::i32);
+  SDOperand StackPtr = DAG.getRegister(X86::ESP, MVT::i32);
   NumIntRegs = 0;
   std::vector<SDOperand> Stores;
   std::vector<SDOperand> RegValuesToPass;