diff options
Diffstat (limited to 'lib/Target/X86/X86RegisterInfo.cpp')
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index d96aafda603a..9bd96af6c750 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -591,6 +591,15 @@ X86RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, int FrameIndex = MI.getOperand(i).getIndex(); unsigned BasePtr; + // DEBUG_VALUE has a special representation, and is only robust enough to + // represent SP(or BP) +- offset addressing modes. We rewrite the + // FrameIndex to be a constant; implicitly positive constants are relative + // to ESP and negative ones to EBP. + if (MI.getOpcode()==TargetInstrInfo::DEBUG_VALUE) { + MI.getOperand(i).ChangeToImmediate(getFrameIndexOffset(MF, FrameIndex)); + return 0; + } + if (needsStackRealignment(MF)) BasePtr = (FrameIndex < 0 ? FramePtr : StackPtr); else |