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Added moveReg2Reg() and moveImm2Reg() to accomodate moving data around due to 

PHI nodes.

llvm-svn: 5001
This commit is contained in:
Misha Brukman 2002-12-13 09:54:12 +00:00
parent 34cd32d42a
commit 78401cbb3c
3 changed files with 56 additions and 0 deletions
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10
llvm/include/llvm/Target/MRegisterInfo.h
View File

@ -129,6 +129,16 @@ public:
unsigned DestReg, unsigned SrcReg,
unsigned ImmOffset, unsigned dataSize) const = 0;
virtual MachineBasicBlock::iterator
moveReg2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg, unsigned dataSize) const = 0;
virtual MachineBasicBlock::iterator
moveImm2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned Imm, unsigned dataSize) const = 0;
virtual MachineBasicBlock::iterator
emitPrologue(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,

36
llvm/lib/Target/X86/X86RegisterInfo.cpp
View File

@ -63,6 +63,42 @@ X86RegisterInfo::loadRegOffset2Reg(MachineBasicBlock *MBB,
return ++(MBB->insert(MBBI, MI));
}
MachineBasicBlock::iterator
X86RegisterInfo::moveReg2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg,
unsigned dataSize) const
{
unsigned opcode;
switch (dataSize) {
case 1: opcode = X86::MOVrr8; break;
case 2: opcode = X86::MOVrr16; break;
case 4: opcode = X86::MOVrr32; break;
default: assert(0 && "Invalid data size!");
}
MachineInstr *MI = BuildMI(opcode, 2).addReg(DestReg).addReg(SrcReg);
return ++(MBB->insert(MBBI, MI));
}
MachineBasicBlock::iterator
X86RegisterInfo::moveImm2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned Imm, unsigned dataSize)
const
{
unsigned opcode;
switch (dataSize) {
case 1: opcode = X86::MOVir8; break;
case 2: opcode = X86::MOVir16; break;
case 4: opcode = X86::MOVir32; break;
default: assert(0 && "Invalid data size!");
}
MachineInstr *MI = BuildMI(opcode, 2).addReg(DestReg).addReg(Imm);
return ++(MBB->insert(MBBI, MI));
}
unsigned X86RegisterInfo::getFramePointer() const {
return X86::EBP;

10
llvm/lib/Target/X86/X86RegisterInfo.h
View File

@ -29,6 +29,16 @@ struct X86RegisterInfo : public MRegisterInfo {
unsigned DestReg, unsigned SrcReg,
unsigned ImmOffset, unsigned dataSize) const;
MachineBasicBlock::iterator
moveReg2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned SrcReg, unsigned dataSize) const;
MachineBasicBlock::iterator
moveImm2Reg(MachineBasicBlock *MBB,
MachineBasicBlock::iterator MBBI,
unsigned DestReg, unsigned Imm, unsigned dataSize) const;
unsigned getFramePointer() const;
unsigned getStackPointer() const;