diff options
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCFrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCFrameLowering.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp index 1d8aaac46d3..c59c619e0bc 100644 --- a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp @@ -1419,6 +1419,17 @@ void PPCFrameLowering::determineCalleeSaves(MachineFunction &MF, FI->setPICBasePointerSaveIndex(PBPSI); } + // Make sure we don't explicitly spill r31, because, for example, we have + // some inline asm which explicity clobbers it, when we otherwise have a + // frame pointer and are using r31's spill slot for the prologue/epilogue + // code. Same goes for the base pointer and the PIC base register. + if (needsFP(MF)) + SavedRegs.reset(isPPC64 ? PPC::X31 : PPC::R31); + if (RegInfo->hasBasePointer(MF)) + SavedRegs.reset(RegInfo->getBaseRegister(MF)); + if (FI->usesPICBase()) + SavedRegs.reset(PPC::R30); + // Reserve stack space to move the linkage area to in case of a tail call. int TCSPDelta = 0; if (MF.getTarget().Options.GuaranteedTailCallOpt && |
