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| author | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-17 04:33:18 +0000 |
|---|---|---|
| committer | Alkis Evlogimenos <alkis@evlogimenos.com> | 2004-02-17 04:33:18 +0000 |
| commit | cde4ade314a52a02c66a98404434842b82138d2e (patch) | |
| tree | eb41efc1f133238d005c73eab50ca61f8ca90bff /llvm/lib/Target/X86/X86RegisterInfo.cpp | |
| parent | 818bcec24741b6b19fde167041bac3ae76496245 (diff) | |
| download | bcm5719-llvm-cde4ade314a52a02c66a98404434842b82138d2e.tar.gz bcm5719-llvm-cde4ade314a52a02c66a98404434842b82138d2e.zip | |
Add API to check and fold memory operands into instructions.
llvm-svn: 11519
Diffstat (limited to 'llvm/lib/Target/X86/X86RegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86RegisterInfo.cpp | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp index 59be5fb7c43..01a3f07d408 100644 --- a/llvm/lib/Target/X86/X86RegisterInfo.cpp +++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp @@ -79,6 +79,87 @@ int X86RegisterInfo::copyRegToReg(MachineBasicBlock &MBB, return 1; } +bool X86RegisterInfo::canFoldMemoryOperand(MachineInstr* MI, + unsigned i) const +{ + switch(MI->getOpcode()) { + case X86::ADDrr8: case X86::ADDrr16: case X86::ADDrr32: + case X86::ADDri8: case X86::ADDri16: case X86::ADDri32: + case X86::MOVrr8: case X86::MOVrr16: case X86::MOVrr32: + return true; + default: + return false; + } +} + +int X86RegisterInfo::foldMemoryOperand(MachineInstr* MI, + unsigned i, + int FrameIndex) const +{ + MachineBasicBlock& MBB = *MI->getParent(); + MachineInstr* NI = 0; + if (i == 0) + switch(MI->getOpcode()) { + case X86::MOVrr8: + NI = addFrameReference(BuildMI(X86::MOVmr8, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::MOVrr16: + NI = addFrameReference(BuildMI(X86::MOVmr16, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::MOVrr32: + NI = addFrameReference(BuildMI(X86::MOVmr32, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::ADDrr8: + NI = addFrameReference(BuildMI(X86::ADDmr8, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::ADDrr16: + NI = addFrameReference(BuildMI(X86::ADDmr16, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::ADDrr32: + NI = addFrameReference(BuildMI(X86::ADDmr32, 5), FrameIndex).addReg(MI->getOperand(1).getReg()); + break; + case X86::ADDri8: + NI = addFrameReference(BuildMI(X86::ADDmi8, 5), FrameIndex).addZImm(MI->getOperand(1).getImmedValue()); + break; + case X86::ADDri16: + NI = addFrameReference(BuildMI(X86::ADDmi16, 5), FrameIndex).addZImm(MI->getOperand(1).getImmedValue()); + break; + case X86::ADDri32: + NI = addFrameReference(BuildMI(X86::ADDmi32, 5), FrameIndex).addZImm(MI->getOperand(1).getImmedValue()); + break; + default: + assert(0 && "Operand cannot be folded"); + } + else if (i == 1) + switch(MI->getOpcode()) { + case X86::MOVrr8: + NI = addFrameReference(BuildMI(X86::MOVrm8, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + case X86::MOVrr16: + NI = addFrameReference(BuildMI(X86::MOVrm16, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + case X86::MOVrr32: + NI = addFrameReference(BuildMI(X86::MOVrm32, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + case X86::ADDrr8: + NI = addFrameReference(BuildMI(X86::ADDrm8, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + case X86::ADDrr16: + NI = addFrameReference(BuildMI(X86::ADDrm16, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + case X86::ADDrr32: + NI = addFrameReference(BuildMI(X86::ADDrm32, 5).addReg(MI->getOperand(0).getReg()), FrameIndex); + break; + default: + assert(0 && "Operand cannot be folded"); + } + else + assert(0 && "Operand cannot be folded"); + + MBB.insert(MBB.erase(MI), NI); + return 0; +} + //===----------------------------------------------------------------------===// // Stack Frame Processing methods //===----------------------------------------------------------------------===// |
