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Move DenseMapInfo for MachineInstr* to MachineInstr.h 

llvm-svn: 97667
This commit is contained in:
Evan Cheng 2010-03-03 21:47:16 +00:00
parent 114a85381a
commit 0dd0c47b7e
2 changed files with 62 additions and 63 deletions
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62
llvm/include/llvm/CodeGen/MachineInstr.h
View File

@ -419,6 +419,68 @@ private:
void AddRegOperandsToUseLists(MachineRegisterInfo &RegInfo);
};
/// DenseMapInfo for MachineInstr*.
template<> struct DenseMapInfo<MachineInstr*> {
static inline MachineInstr *getEmptyKey() {
return 0;
}
static inline MachineInstr *getTombstoneKey() {
return reinterpret_cast<MachineInstr*>(-1);
}
static unsigned getHashValue(const MachineInstr* const &MI) {
unsigned Hash = MI->getOpcode() * 37;
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
uint64_t Key = (uint64_t)MO.getType() << 32;
switch (MO.getType()) {
default: break;
case MachineOperand::MO_Register:
if (MO.isDef())
continue; // Skip defs.
Key |= MO.getReg();
break;
case MachineOperand::MO_Immediate:
Key |= MO.getImm();
break;
case MachineOperand::MO_FrameIndex:
case MachineOperand::MO_ConstantPoolIndex:
case MachineOperand::MO_JumpTableIndex:
Key |= MO.getIndex();
break;
case MachineOperand::MO_MachineBasicBlock:
Key |= DenseMapInfo<void*>::getHashValue(MO.getMBB());
break;
case MachineOperand::MO_GlobalAddress:
Key |= DenseMapInfo<void*>::getHashValue(MO.getGlobal());
break;
case MachineOperand::MO_BlockAddress:
Key |= DenseMapInfo<void*>::getHashValue(MO.getBlockAddress());
break;
}
Key += ~(Key << 32);
Key ^= (Key >> 22);
Key += ~(Key << 13);
Key ^= (Key >> 8);
Key += (Key << 3);
Key ^= (Key >> 15);
Key += ~(Key << 27);
Key ^= (Key >> 31);
Hash = (unsigned)Key + Hash * 37;
}
return Hash;
}
static bool isEqual(const MachineInstr* const &LHS,
const MachineInstr* const &RHS) {
if (RHS == getEmptyKey() || RHS == getTombstoneKey() ||
LHS == getEmptyKey() || LHS == getTombstoneKey())
return LHS == RHS;
return LHS->isIdenticalTo(RHS, MachineInstr::IgnoreVRegDefs);
}
};
//===----------------------------------------------------------------------===//
// Debugging Support

63
llvm/lib/CodeGen/MachineCSE.cpp
View File

@ -28,69 +28,6 @@ using namespace llvm;
STATISTIC(NumCoalesces, "Number of copies coalesced");
STATISTIC(NumCSEs, "Number of common subexpression eliminated");
namespace llvm {
template<> struct DenseMapInfo<MachineInstr*> {
static inline MachineInstr *getEmptyKey() {
return 0;
}
static inline MachineInstr *getTombstoneKey() {
return reinterpret_cast<MachineInstr*>(-1);
}
static unsigned getHashValue(const MachineInstr* const &MI) {
unsigned Hash = MI->getOpcode() * 37;
for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
const MachineOperand &MO = MI->getOperand(i);
uint64_t Key = (uint64_t)MO.getType() << 32;
switch (MO.getType()) {
default: break;
case MachineOperand::MO_Register:
if (MO.isDef() && TargetRegisterInfo::isVirtualRegister(MO.getReg()))
continue; // Skip virtual register defs.
Key |= MO.getReg();
break;
case MachineOperand::MO_Immediate:
Key |= MO.getImm();
break;
case MachineOperand::MO_FrameIndex:
case MachineOperand::MO_ConstantPoolIndex:
case MachineOperand::MO_JumpTableIndex:
Key |= MO.getIndex();
break;
case MachineOperand::MO_MachineBasicBlock:
Key |= DenseMapInfo<void*>::getHashValue(MO.getMBB());
break;
case MachineOperand::MO_GlobalAddress:
Key |= DenseMapInfo<void*>::getHashValue(MO.getGlobal());
break;
case MachineOperand::MO_BlockAddress:
Key |= DenseMapInfo<void*>::getHashValue(MO.getBlockAddress());
break;
}
Key += ~(Key << 32);
Key ^= (Key >> 22);
Key += ~(Key << 13);
Key ^= (Key >> 8);
Key += (Key << 3);
Key ^= (Key >> 15);
Key += ~(Key << 27);
Key ^= (Key >> 31);
Hash = (unsigned)Key + Hash * 37;
}
return Hash;
}
static bool isEqual(const MachineInstr* const &LHS,
const MachineInstr* const &RHS) {
if (RHS == getEmptyKey() || RHS == getTombstoneKey() ||
LHS == getEmptyKey() || LHS == getTombstoneKey())
return LHS == RHS;
return LHS->isIdenticalTo(RHS, MachineInstr::IgnoreVRegDefs);
}
};
} // end llvm namespace
namespace {
class MachineCSE : public MachineFunctionPass {
const TargetInstrInfo *TII;