From 3bb9b9a1ab0641694b5bc1aa3cdec42d69ef0606 Mon Sep 17 00:00:00 2001
From: Bill Wendling <isanbard@gmail.com>
Date: Sun, 2 Aug 2009 22:25:37 +0000
Subject: [PATCH] The x86 jit doesn't generate a def_cfa_offset unwind
 instruction after the pushes in the function prolog if the function doesn't
 have any stack space, i.e. for a prolog like:

0x40011870:     push %r15
0x40011872:     push %r14
0x40011874:     push %rbx

Patch by Zoltan!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77919 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86RegisterInfo.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 8c54aebb9ea..3fa53733c0d 100644
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -1059,7 +1059,7 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
       emitSPUpdate(MBB, MBBI, StackPtr, -(int64_t)NumBytes, Is64Bit, TII);
   }
 
-  if (!HasFP && needsFrameMoves && NumBytes) {
+  if (!HasFP && needsFrameMoves) {
     // Mark end of stack pointer adjustment.
     unsigned LabelId = MMI->NextLabelID();
     BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(LabelId);