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Add support for folding memory operands into AND and IMUL's

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11523 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-17 05:46:06 +00:00
parent 7c035b73a4
commit 0f9c491abc
1 changed files with 30 additions and 2 deletions
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32
lib/Target/X86/X86RegisterInfo.cpp
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@ -85,8 +85,13 @@ bool X86RegisterInfo::canFoldMemoryOperand(MachineInstr* MI,
switch(MI->getOpcode()) {
case X86::ADDrr8: case X86::ADDrr16: case X86::ADDrr32:
case X86::ADDri8: case X86::ADDri16: case X86::ADDri32:
case X86::ANDrr8: case X86::ANDrr16: case X86::ANDrr32:
case X86::ANDri8: case X86::ANDri16: case X86::ANDri32:
case X86::MOVrr8: case X86::MOVrr16: case X86::MOVrr32:
return true;
case X86::IMULrr16: case X86::IMULrr32:
case X86::IMULrri16: case X86::IMULrri32:
return i == 1;
default:
return false;
}
@ -106,10 +111,18 @@ static MachineInstr *MakeMIInst(unsigned Opcode, unsigned FrameIndex,
static MachineInstr *MakeRMInst(unsigned Opcode, unsigned FrameIndex,
MachineInstr *MI) {
return addFrameReference(BuildMI(Opcode, 5)
.addReg(MI->getOperand(0).getReg()), FrameIndex);
return addFrameReference(BuildMI(Opcode, 5, MI->getOperand(0).getReg()),
FrameIndex);
}
static MachineInstr *MakeRMIInst(unsigned Opcode, unsigned FrameIndex,
MachineInstr *MI) {
return addFrameReference(BuildMI(Opcode, 5, MI->getOperand(0).getReg()),
FrameIndex).addZImm(MI->getOperand(2).getImmedValue());
}
int X86RegisterInfo::foldMemoryOperand(MachineInstr* MI,
unsigned i,
int FrameIndex) const
@ -129,6 +142,13 @@ int X86RegisterInfo::foldMemoryOperand(MachineInstr* MI,
case X86::ADDri8: NI = MakeMIInst(X86::ADDmi8 , FrameIndex, MI); break;
case X86::ADDri16: NI = MakeMIInst(X86::ADDmi16, FrameIndex, MI); break;
case X86::ADDri32: NI = MakeMIInst(X86::ADDmi32, FrameIndex, MI); break;
case X86::ANDrr8: NI = MakeMRInst(X86::ANDmr8 , FrameIndex, MI); break;
case X86::ANDrr16: NI = MakeMRInst(X86::ANDmr16, FrameIndex, MI); break;
case X86::ANDrr32: NI = MakeMRInst(X86::ANDmr32, FrameIndex, MI); break;
case X86::ANDri8: NI = MakeMIInst(X86::ANDmi8 , FrameIndex, MI); break;
case X86::ANDri16: NI = MakeMIInst(X86::ANDmi16, FrameIndex, MI); break;
case X86::ANDri32: NI = MakeMIInst(X86::ANDmi32, FrameIndex, MI); break;
default: assert(0 && "Operand cannot be folded");
}
} else if (i == 1) {
@ -139,6 +159,14 @@ int X86RegisterInfo::foldMemoryOperand(MachineInstr* MI,
case X86::ADDrr8: NI = MakeRMInst(X86::ADDrm8 , FrameIndex, MI); break;
case X86::ADDrr16: NI = MakeRMInst(X86::ADDrm16, FrameIndex, MI); break;
case X86::ADDrr32: NI = MakeRMInst(X86::ADDrm32, FrameIndex, MI); break;
case X86::ANDrr8: NI = MakeRMInst(X86::ANDrm8 , FrameIndex, MI); break;
case X86::ANDrr16: NI = MakeRMInst(X86::ANDrm16, FrameIndex, MI); break;
case X86::ANDrr32: NI = MakeRMInst(X86::ANDrm32, FrameIndex, MI); break;
case X86::IMULrr16:NI = MakeRMInst(X86::IMULrm16, FrameIndex, MI); break;
case X86::IMULrr32:NI = MakeRMInst(X86::IMULrm32, FrameIndex, MI); break;
case X86::IMULrri16: NI = MakeRMIInst(X86::IMULrmi16, FrameIndex, MI); break;
case X86::IMULrri32: NI = MakeRMIInst(X86::IMULrmi32, FrameIndex, MI); break;
default: assert(0 && "Operand cannot be folded");
}
} else {