diff options
| -rw-r--r-- | lib/Target/X86/X86RegisterInfo.cpp | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/Target/X86/X86RegisterInfo.cpp b/lib/Target/X86/X86RegisterInfo.cpp index f4fd4522ae..29bdf94a68 100644 --- a/lib/Target/X86/X86RegisterInfo.cpp +++ b/lib/Target/X86/X86RegisterInfo.cpp @@ -1297,9 +1297,21 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const { // Add callee saved registers to move list. const std::vector<CalleeSavedInfo> &CSI = MFI->getCalleeSavedInfo(); - for (unsigned I = 0, E = CSI.size(); I != E; ++I) { + + // FIXME: This is dirty hack. The code itself is pretty mess right now. + // It should be rewritten from scratch and generalized sometimes. + + // Determine maximum offset (minumum due to stack growth) + int64_t MaxOffset = 0; + for (unsigned I = 0, E = CSI.size(); I!=E; ++I) + MaxOffset = std::min(MaxOffset, + MFI->getObjectOffset(CSI[I].getFrameIdx())); + + // Calculate offsets + 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); MachineLocation CSDst(MachineLocation::VirtualFP, Offset); MachineLocation CSSrc(Reg); Moves.push_back(MachineMove(FrameLabelId, CSDst, CSSrc)); |