diff options
| -rw-r--r-- | lib/Target/PowerPC/PPC32ISelSimple.cpp | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp index 3d84865b82..d7e131daea 100644 --- a/lib/Target/PowerPC/PPC32ISelSimple.cpp +++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp @@ -871,6 +871,16 @@ void PPC32ISel::LoadArgumentsToVirtualRegs(Function &Fn) { void PPC32ISel::SelectPHINodes() { const TargetInstrInfo &TII = *TM.getInstrInfo(); const Function &LF = *F->getFunction(); // The LLVM function... + + MachineBasicBlock::iterator MFLRIt = F->begin()->begin(); + if (GlobalBaseInitialized) { + // If we emitted a MFLR for the global base reg, get an iterator to an + // instruction after it. + while (MFLRIt->getOpcode() != PPC::MFLR) + ++MFLRIt; + ++MFLRIt; // step one MI past it. + } + for (Function::const_iterator I = LF.begin(), E = LF.end(); I != E; ++I) { const BasicBlock *BB = I; MachineBasicBlock &MBB = *MBBMap[I]; @@ -938,6 +948,12 @@ void PPC32ISel::SelectPHINodes() { while (PI != PredMBB->end() && PI->getOpcode() == PPC::PHI) ++PI; + // If this is the entry block, and if the entry block contains a + // MFLR instruction, emit this operation after it. This is needed + // because global addresses use it. + if (PredMBB == F->begin()) + PI = MFLRIt; + ValReg = getReg(Val, PredMBB, PI); } |