diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCFrameLowering.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCFrameLowering.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/Target/PowerPC/PPCFrameLowering.cpp b/lib/Target/PowerPC/PPCFrameLowering.cpp index cc1ed6967b..6dfb4c8d77 100644 --- a/lib/Target/PowerPC/PPCFrameLowering.cpp +++ b/lib/Target/PowerPC/PPCFrameLowering.cpp @@ -786,7 +786,8 @@ PPCFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF, PPCFunctionInfo *FI = MF.getInfo<PPCFunctionInfo>(); unsigned LR = RegInfo->getRARegister(); FI->setMustSaveLR(MustSaveLR(MF, LR)); - MF.getRegInfo().setPhysRegUnused(LR); + MachineRegisterInfo &MRI = MF.getRegInfo(); + MRI.setPhysRegUnused(LR); // Save R31 if necessary int FPSI = FI->getFramePointerSaveIndex(); @@ -811,6 +812,16 @@ PPCFrameLowering::processFunctionBeforeCalleeSavedScan(MachineFunction &MF, MFI->CreateFixedObject(-1 * TCSPDelta, TCSPDelta, true); } + // For 32-bit SVR4, allocate the nonvolatile CR spill slot iff the + // function uses CR 2, 3, or 4. + if (!isPPC64 && !isDarwinABI && + (MRI.isPhysRegUsed(PPC::CR2) || + MRI.isPhysRegUsed(PPC::CR3) || + MRI.isPhysRegUsed(PPC::CR4))) { + int FrameIdx = MFI->CreateFixedObject((uint64_t)4, (int64_t)-4, true); + FI->setCRSpillFrameIndex(FrameIdx); + } + // Reserve a slot closest to SP or frame pointer if we have a dynalloc or // a large stack, which will require scavenging a register to materialize a // large offset. |