commit c1eef0a455b617d841bc6178a06e37af42f8af0c
author Evan Cheng <evan.cheng@apple.com> Thu Jan 10 00:37:26 2008 +0000
committer Evan Cheng <evan.cheng@apple.com> Thu Jan 10 00:37:26 2008 +0000
tree c6c9c74fde003d29592cc245a2d16c5c7f288f71
parent f2a8e0e297c74ec8d57075e90eaead3d00083b8b

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45798 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index bd598e2..a7cf6cf 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1332,7 +1332,7 @@
     } 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));