From: Bill Wendling <isanbard@gmail.com>
Date: Thu, 3 Sep 2009 22:19:22 +0000 (+0000)
Subject: If we've pushed registers onto the stack, but aren't adjusting the stack pointer
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=eb3a7665296bf35a8f5f4b17a9a4b9d20961dd84;p=oota-llvm.git

If we've pushed registers onto the stack, but aren't adjusting the stack pointer
(i.e., there are no local variables and stuff), we still need to output FDE
information for the pushed registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80960 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp
index 5d1ee17c37a..76d2b97bf9f 100644
--- a/lib/Target/X86/X86RegisterInfo.cpp
+++ b/lib/Target/X86/X86RegisterInfo.cpp
@@ -1086,12 +1086,12 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
       emitSPUpdate(MBB, MBBI, StackPtr, -(int64_t)NumBytes, Is64Bit, TII);
   }
 
-  if (NumBytes && needsFrameMoves) {
+  if ((NumBytes || PushedRegs) && needsFrameMoves) {
     // Mark end of stack pointer adjustment.
     unsigned LabelId = MMI->NextLabelID();
     BuildMI(MBB, MBBI, DL, TII.get(X86::DBG_LABEL)).addImm(LabelId);
 
-    if (!HasFP) {
+    if (!HasFP && NumBytes) {
       // Define the current CFA rule to use the provided offset.
       if (StackSize) {
         MachineLocation SPDst(MachineLocation::VirtualFP);