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Add IMPLICIT_DEF of LR for branch-and-link instrs (calls and global accesses) 

llvm-svn: 15270
This commit is contained in:
Misha Brukman 2004-07-27 17:13:58 +00:00
parent 5174f436d2
commit 640ec1e5e6
2 changed files with 4 additions and 0 deletions
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2
llvm/lib/Target/PowerPC/PPC32ISelSimple.cpp
View File

@ -522,6 +522,7 @@ void ISel::copyGlobalBaseToRegister(MachineBasicBlock *MBB,
MachineBasicBlock &FirstMBB = F->front();
MachineBasicBlock::iterator MBBI = FirstMBB.begin();
GlobalBaseReg = makeAnotherReg(Type::IntTy);
BuildMI(FirstMBB, MBBI, PPC32::IMPLICIT_DEF, 0, PPC32::LR);
BuildMI(FirstMBB, MBBI, PPC32::MovePCtoLR, 0, GlobalBaseReg);
GlobalBaseInitialized = true;
}
@ -1576,6 +1577,7 @@ void ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
BuildMI(BB, PPC32::ADJCALLSTACKDOWN, 1).addSImm(0);
}
BuildMI(BB, PPC32::IMPLICIT_DEF, 0, PPC32::LR);
BB->push_back(CallMI);
BuildMI(BB, PPC32::ADJCALLSTACKUP, 1).addSImm(NumBytes);

2
llvm/lib/Target/PowerPC/PowerPCISelSimple.cpp
View File

@ -522,6 +522,7 @@ void ISel::copyGlobalBaseToRegister(MachineBasicBlock *MBB,
MachineBasicBlock &FirstMBB = F->front();
MachineBasicBlock::iterator MBBI = FirstMBB.begin();
GlobalBaseReg = makeAnotherReg(Type::IntTy);
BuildMI(FirstMBB, MBBI, PPC32::IMPLICIT_DEF, 0, PPC32::LR);
BuildMI(FirstMBB, MBBI, PPC32::MovePCtoLR, 0, GlobalBaseReg);
GlobalBaseInitialized = true;
}
@ -1576,6 +1577,7 @@ void ISel::doCall(const ValueRecord &Ret, MachineInstr *CallMI,
BuildMI(BB, PPC32::ADJCALLSTACKDOWN, 1).addSImm(0);
}
BuildMI(BB, PPC32::IMPLICIT_DEF, 0, PPC32::LR);
BB->push_back(CallMI);
BuildMI(BB, PPC32::ADJCALLSTACKUP, 1).addSImm(NumBytes);