-//===-- PeepholeOptimizer.cpp - X86 Peephole Optimizer --------------------===//
+//===-- X86PeepholeOpt.cpp - X86 Peephole Optimizer -----------------------===//
//
// The LLVM Compiler Infrastructure
//
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
-#include "Support/Statistic.h"
-#include "Support/STLExtras.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/ADT/STLExtras.h"
using namespace llvm;
MachineInstr *Next = (NextI != MBB.end()) ? &*NextI : (MachineInstr*)0;
unsigned Size = 0;
switch (MI->getOpcode()) {
- case X86::MOVrr8:
- case X86::MOVrr16:
- case X86::MOVrr32: // Destroy X = X copies...
+ case X86::MOV8rr:
+ case X86::MOV16rr:
+ case X86::MOV32rr: // Destroy X = X copies...
if (MI->getOperand(0).getReg() == MI->getOperand(1).getReg()) {
I = MBB.erase(I);
return true;
// immediate despite the fact that the operands are 16 or 32 bits. Because
// this can save three bytes of code size (and icache space), we want to
// shrink them if possible.
- case X86::IMULrri16: case X86::IMULrri32:
+ case X86::IMUL16rri: case X86::IMUL32rri:
assert(MI->getNumOperands() == 3 && "These should all have 3 operands!");
if (MI->getOperand(2).isImmediate()) {
int Val = MI->getOperand(2).getImmedValue();
unsigned Opcode;
switch (MI->getOpcode()) {
default: assert(0 && "Unknown opcode value!");
- case X86::IMULrri16: Opcode = X86::IMULrri16b; break;
- case X86::IMULrri32: Opcode = X86::IMULrri32b; break;
+ case X86::IMUL16rri: Opcode = X86::IMUL16rri8; break;
+ case X86::IMUL32rri: Opcode = X86::IMUL32rri8; break;
}
unsigned R0 = MI->getOperand(0).getReg();
unsigned R1 = MI->getOperand(1).getReg();
return false;
#if 0
- case X86::IMULrmi16: case X86::IMULrmi32:
+ case X86::IMUL16rmi: case X86::IMUL32rmi:
assert(MI->getNumOperands() == 6 && "These should all have 6 operands!");
if (MI->getOperand(5).isImmediate()) {
int Val = MI->getOperand(5).getImmedValue();
unsigned Opcode;
switch (MI->getOpcode()) {
default: assert(0 && "Unknown opcode value!");
- case X86::IMULrmi16: Opcode = X86::IMULrmi16b; break;
- case X86::IMULrmi32: Opcode = X86::IMULrmi32b; break;
+ case X86::IMUL16rmi: Opcode = X86::IMUL16rmi8; break;
+ case X86::IMUL32rmi: Opcode = X86::IMUL32rmi8; break;
}
unsigned R0 = MI->getOperand(0).getReg();
unsigned R1 = MI->getOperand(1).getReg();
return false;
#endif
- case X86::ADDri16: case X86::ADDri32:
- case X86::SUBri16: case X86::SUBri32:
- case X86::ANDri16: case X86::ANDri32:
- case X86::ORri16: case X86::ORri32:
- case X86::XORri16: case X86::XORri32:
+ case X86::ADD16ri: case X86::ADD32ri: case X86::ADC32ri:
+ case X86::SUB16ri: case X86::SUB32ri:
+ case X86::SBB16ri: case X86::SBB32ri:
+ case X86::AND16ri: case X86::AND32ri:
+ case X86::OR16ri: case X86::OR32ri:
+ case X86::XOR16ri: case X86::XOR32ri:
assert(MI->getNumOperands() == 2 && "These should all have 2 operands!");
if (MI->getOperand(1).isImmediate()) {
int Val = MI->getOperand(1).getImmedValue();
unsigned Opcode;
switch (MI->getOpcode()) {
default: assert(0 && "Unknown opcode value!");
- case X86::ADDri16: Opcode = X86::ADDri16b; break;
- case X86::ADDri32: Opcode = X86::ADDri32b; break;
- case X86::SUBri16: Opcode = X86::SUBri16b; break;
- case X86::SUBri32: Opcode = X86::SUBri32b; break;
- case X86::ANDri16: Opcode = X86::ANDri16b; break;
- case X86::ANDri32: Opcode = X86::ANDri32b; break;
- case X86::ORri16: Opcode = X86::ORri16b; break;
- case X86::ORri32: Opcode = X86::ORri32b; break;
- case X86::XORri16: Opcode = X86::XORri16b; break;
- case X86::XORri32: Opcode = X86::XORri32b; break;
+ case X86::ADD16ri: Opcode = X86::ADD16ri8; break;
+ case X86::ADD32ri: Opcode = X86::ADD32ri8; break;
+ case X86::ADC32ri: Opcode = X86::ADC32ri8; break;
+ case X86::SUB16ri: Opcode = X86::SUB16ri8; break;
+ case X86::SUB32ri: Opcode = X86::SUB32ri8; break;
+ case X86::SBB16ri: Opcode = X86::SBB16ri8; break;
+ case X86::SBB32ri: Opcode = X86::SBB32ri8; break;
+ case X86::AND16ri: Opcode = X86::AND16ri8; break;
+ case X86::AND32ri: Opcode = X86::AND32ri8; break;
+ case X86::OR16ri: Opcode = X86::OR16ri8; break;
+ case X86::OR32ri: Opcode = X86::OR32ri8; break;
+ case X86::XOR16ri: Opcode = X86::XOR16ri8; break;
+ case X86::XOR32ri: Opcode = X86::XOR32ri8; break;
}
unsigned R0 = MI->getOperand(0).getReg();
I = MBB.insert(MBB.erase(I),
}
return false;
-// FIXME: The printer currently does not play well with instructions
-// that have immediates and memory operands with size mismatches so
-// the following are disabled.
-#if 0
- case X86::ADDmi16: case X86::ADDmi32:
- case X86::SUBmi16: case X86::SUBmi32:
- case X86::ANDmi16: case X86::ANDmi32:
- case X86::ORmi16: case X86::ORmi32:
- case X86::XORmi16: case X86::XORmi32:
+ case X86::ADD16mi: case X86::ADD32mi: case X86::ADC32mi:
+ case X86::SUB16mi: case X86::SUB32mi:
+ case X86::SBB16mi: case X86::SBB32mi:
+ case X86::AND16mi: case X86::AND32mi:
+ case X86::OR16mi: case X86::OR32mi:
+ case X86::XOR16mi: case X86::XOR32mi:
assert(MI->getNumOperands() == 5 && "These should all have 5 operands!");
if (MI->getOperand(4).isImmediate()) {
int Val = MI->getOperand(4).getImmedValue();
unsigned Opcode;
switch (MI->getOpcode()) {
default: assert(0 && "Unknown opcode value!");
- case X86::ADDmi16: Opcode = X86::ADDmi16b; break;
- case X86::ADDmi32: Opcode = X86::ADDmi32b; break;
- case X86::SUBmi16: Opcode = X86::SUBmi16b; break;
- case X86::SUBmi32: Opcode = X86::SUBmi32b; break;
- case X86::ANDmi16: Opcode = X86::ANDmi16b; break;
- case X86::ANDmi32: Opcode = X86::ANDmi32b; break;
- case X86::ORmi16: Opcode = X86::ORmi16b; break;
- case X86::ORmi32: Opcode = X86::ORmi32b; break;
- case X86::XORmi16: Opcode = X86::XORmi16b; break;
- case X86::XORmi32: Opcode = X86::XORmi32b; break;
+ case X86::ADD16mi: Opcode = X86::ADD16mi8; break;
+ case X86::ADD32mi: Opcode = X86::ADD32mi8; break;
+ case X86::ADC32mi: Opcode = X86::ADC32mi8; break;
+ case X86::SUB16mi: Opcode = X86::SUB16mi8; break;
+ case X86::SUB32mi: Opcode = X86::SUB32mi8; break;
+ case X86::SBB16mi: Opcode = X86::SBB16mi8; break;
+ case X86::SBB32mi: Opcode = X86::SBB32mi8; break;
+ case X86::AND16mi: Opcode = X86::AND16mi8; break;
+ case X86::AND32mi: Opcode = X86::AND32mi8; break;
+ case X86::OR16mi: Opcode = X86::OR16mi8; break;
+ case X86::OR32mi: Opcode = X86::OR32mi8; break;
+ case X86::XOR16mi: Opcode = X86::XOR16mi8; break;
+ case X86::XOR32mi: Opcode = X86::XOR32mi8; break;
}
unsigned R0 = MI->getOperand(0).getReg();
unsigned Scale = MI->getOperand(1).getImmedValue();
unsigned R1 = MI->getOperand(2).getReg();
- unsigned Offset = MI->getOperand(3).getImmedValue();
- I = MBB.insert(MBB.erase(I),
- BuildMI(Opcode, 5).addReg(R0).addZImm(Scale).
- addReg(R1).addSImm(Offset).addZImm((char)Val));
+ if (MI->getOperand(3).isImmediate()) {
+ unsigned Offset = MI->getOperand(3).getImmedValue();
+ I = MBB.insert(MBB.erase(I),
+ BuildMI(Opcode, 5).addReg(R0).addZImm(Scale).
+ addReg(R1).addSImm(Offset).addZImm((char)Val));
+ } else if (MI->getOperand(3).isGlobalAddress()) {
+ GlobalValue *GA = MI->getOperand(3).getGlobal();
+ int Offset = MI->getOperand(3).getOffset();
+ I = MBB.insert(MBB.erase(I),
+ BuildMI(Opcode, 5).addReg(R0).addZImm(Scale).
+ addReg(R1).addGlobalAddress(GA, false, Offset).
+ addZImm((char)Val));
+ }
return true;
}
}
return false;
-#endif
#if 0
- case X86::MOVri32: Size++;
- case X86::MOVri16: Size++;
- case X86::MOVri8:
+ case X86::MOV32ri: Size++;
+ case X86::MOV16ri: Size++;
+ case X86::MOV8ri:
// FIXME: We can only do this transformation if we know that flags are not
// used here, because XOR clobbers the flags!
if (MI->getOperand(1).isImmediate()) { // avoid mov EAX, <value>
int Val = MI->getOperand(1).getImmedValue();
if (Val == 0) { // mov EAX, 0 -> xor EAX, EAX
- static const unsigned Opcode[] ={X86::XORrr8,X86::XORrr16,X86::XORrr32};
+ static const unsigned Opcode[] ={X86::XOR8rr,X86::XOR16rr,X86::XOR32rr};
unsigned Reg = MI->getOperand(0).getReg();
I = MBB.insert(MBB.erase(I),
BuildMI(Opcode[Size], 2, Reg).addReg(Reg).addReg(Reg));
}
return false;
#endif
- case X86::BSWAPr32: // Change bswap EAX, bswap EAX into nothing
- if (Next->getOpcode() == X86::BSWAPr32 &&
+ case X86::BSWAP32r: // Change bswap EAX, bswap EAX into nothing
+ if (Next->getOpcode() == X86::BSWAP32r &&
MI->getOperand(0).getReg() == Next->getOperand(0).getReg()) {
I = MBB.erase(MBB.erase(I));
return true;
// Attempt to fold instructions used by the base register into the instruction
if (MachineInstr *DefInst = getDefiningInst(BaseRegOp)) {
switch (DefInst->getOpcode()) {
- case X86::MOVri32:
+ case X86::MOV32ri:
// If there is no displacement set for this instruction set one now.
// FIXME: If we can fold two immediates together, we should do so!
if (DisplacementOp.isImmediate() && !DisplacementOp.getImmedValue()) {
}
break;
- case X86::ADDrr32:
+ case X86::ADD32rr:
// If the source is a register-register add, and we do not yet have an
// index register, fold the add into the memory address.
if (IndexReg == 0) {
}
break;
- case X86::SHLri32:
+ case X86::SHL32ri:
// If this shift could be folded into the index portion of the address if
// it were the index register, move it to the index register operand now,
// so it will be folded in below.
// Attempt to fold instructions used by the index into the instruction
if (MachineInstr *DefInst = getDefiningInst(IndexRegOp)) {
switch (DefInst->getOpcode()) {
- case X86::SHLri32: {
+ case X86::SHL32ri: {
// Figure out what the resulting scale would be if we folded this shift.
unsigned ResScale = Scale * (1 << DefInst->getOperand(2).getImmedValue());
if (isValidScaleAmount(ResScale)) {
bool Changed = false;
- const TargetInstrInfo &TII = MBB.getParent()->getTarget().getInstrInfo();
+ const TargetInstrInfo &TII = *MBB.getParent()->getTarget().getInstrInfo();
// Scan the operands of this instruction. If any operands are
// register-register copies, replace the operand with the source.
switch (MI->getOpcode()) {
// Register to memory stores. Format: <base,scale,indexreg,immdisp>, srcreg
- case X86::MOVmr32: case X86::MOVmr16: case X86::MOVmr8:
- case X86::MOVmi32: case X86::MOVmi16: case X86::MOVmi8:
+ case X86::MOV32mr: case X86::MOV16mr: case X86::MOV8mr:
+ case X86::MOV32mi: case X86::MOV16mi: case X86::MOV8mi:
// Check to see if we can fold the source instruction into this one...
if (MachineInstr *SrcInst = getDefiningInst(MI->getOperand(4))) {
switch (SrcInst->getOpcode()) {
// Fold the immediate value into the store, if possible.
- case X86::MOVri8: return Propagate(MI, 4, SrcInst, 1, X86::MOVmi8);
- case X86::MOVri16: return Propagate(MI, 4, SrcInst, 1, X86::MOVmi16);
- case X86::MOVri32: return Propagate(MI, 4, SrcInst, 1, X86::MOVmi32);
+ case X86::MOV8ri: return Propagate(MI, 4, SrcInst, 1, X86::MOV8mi);
+ case X86::MOV16ri: return Propagate(MI, 4, SrcInst, 1, X86::MOV16mi);
+ case X86::MOV32ri: return Propagate(MI, 4, SrcInst, 1, X86::MOV32mi);
default: break;
}
}
return true;
break;
- case X86::MOVrm32:
- case X86::MOVrm16:
- case X86::MOVrm8:
+ case X86::MOV32rm:
+ case X86::MOV16rm:
+ case X86::MOV8rm:
// If we can optimize the addressing expression, do so now.
if (OptimizeAddress(MI, 1))
return true;
projects / oota-llvm.git / blobdiff