diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/CodeGen/PrologEpilogInserter.cpp | 4 | ||||
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp | 8 |
2 files changed, 11 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/PrologEpilogInserter.cpp b/llvm/lib/CodeGen/PrologEpilogInserter.cpp index 365a84ab524..16bf6ea765f 100644 --- a/llvm/lib/CodeGen/PrologEpilogInserter.cpp +++ b/llvm/lib/CodeGen/PrologEpilogInserter.cpp @@ -197,6 +197,10 @@ void PEI::calculateCalleeSavedRegisters(MachineFunction &Fn) { if (CSRegs == 0 || CSRegs[0] == 0) return; + // In Naked functions we aren't going to save any registers. + if (Fn.getFunction()->hasFnAttr(Attribute::Naked)) + return; + // Figure out which *callee saved* registers are modified by the current // function, thus needing to be saved and restored in the prolog/epilog. const TargetRegisterClass * const *CSRegClasses = diff --git a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp index 8048df21b7d..5f1e04eecb4 100644 --- a/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp +++ b/llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp @@ -409,6 +409,9 @@ PPCRegisterInfo::getCalleeSavedRegClasses(const MachineFunction *MF) const { // static bool needsFP(const MachineFunction &MF) { const MachineFrameInfo *MFI = MF.getFrameInfo(); + // Naked functions have no stack frame pushed, so we don't have a frame pointer. + if (MF.getFunction()->hasFnAttr(Attribute::Naked)) + return false; return DisableFramePointerElim(MF) || MFI->hasVarSizedObjects() || (GuaranteedTailCallOpt && MF.getInfo<PPCFunctionInfo>()->hasFastCall()); } @@ -794,7 +797,10 @@ PPCRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, // If we're not using a Frame Pointer that has been set to the value of the // SP before having the stack size subtracted from it, then add the stack size // to Offset to get the correct offset. - Offset += MFI->getStackSize(); + // Naked functions have stack size 0, although getStackSize may not reflect that + // because we didn't call all the pieces that compute it for naked functions. + if (!MF.getFunction()->hasFnAttr(Attribute::Naked)) + Offset += MFI->getStackSize(); // If we can, encode the offset directly into the instruction. If this is a // normal PPC "ri" instruction, any 16-bit value can be safely encoded. If |
