Author: asl
Date: Fri Oct 26 04:13:24 2007
New Revision: 43381
URL: http://llvm.org/viewvc/llvm-project?rev=43381&view=rev
Log:
Fix off-by-one stack offset computations (dwarf information) for callee-saved
registers in case, when FP pointer was eliminated. This should fixes misc.
random
EH-related crahses, when stuff is compiled with -fomit-frame-pointer.
Thanks Duncan for nailing this bug!
Modified:
llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp
Modified: llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp?rev=43381&r1=43380&r2=43381&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86RegisterInfo.cpp Fri Oct 26 04:13:24 2007
@@ -1816,10 +1816,11 @@
MFI->getObjectOffset(CSI[I].getFrameIdx()));
// Calculate offsets
+ int64_t saveAreaOffset = (hasFP(MF) ? 3 : 2)*stackGrowth;
for (unsigned I = 0, E = CSI.size(); I!=E; ++I) {
int64_t Offset = MFI->getObjectOffset(CSI[I].getFrameIdx());
unsigned Reg = CSI[I].getReg();
- Offset = (MaxOffset-Offset+3*stackGrowth);
+ Offset = (MaxOffset-Offset+saveAreaOffset);
MachineLocation CSDst(MachineLocation::VirtualFP, Offset);
MachineLocation CSSrc(Reg);
Moves.push_back(MachineMove(FrameLabelId, CSDst, CSSrc));
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