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Print out the regclass of any virtual registers used by a machine instruction.

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llvm-svn: 109608
This commit is contained in:
Jakob Stoklund Olesen 2010-07-28 18:35:46 +00:00
parent c9fcc66f8e
commit 7ac201b2e3
1 changed files with 31 additions and 0 deletions
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31
lib/CodeGen/MachineInstr.cpp
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@ -1236,12 +1236,18 @@ static void printDebugLoc(DebugLoc DL, const MachineFunction *MF,
void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
// We can be a bit tidier if we know the TargetMachine and/or MachineFunction.
const MachineFunction *MF = 0;
const MachineRegisterInfo *MRI = 0;
if (const MachineBasicBlock *MBB = getParent()) {
MF = MBB->getParent();
if (!TM && MF)
TM = &MF->getTarget();
if (MF)
MRI = &MF->getRegInfo();
}
// Save a list of virtual registers.
SmallVector<unsigned, 8> VirtRegs;
// Print explicitly defined operands on the left of an assignment syntax.
unsigned StartOp = 0, e = getNumOperands();
for (; StartOp < e && getOperand(StartOp).isReg() &&
@ -1250,6 +1256,9 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
++StartOp) {
if (StartOp != 0) OS << ", ";
getOperand(StartOp).print(OS, TM);
unsigned Reg = getOperand(StartOp).getReg();
if (Reg && TargetRegisterInfo::isVirtualRegister(Reg))
VirtRegs.push_back(Reg);
}
if (StartOp != 0)
@ -1264,6 +1273,10 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
for (unsigned i = StartOp, e = getNumOperands(); i != e; ++i) {
const MachineOperand &MO = getOperand(i);
if (MO.isReg() && MO.getReg() &&
TargetRegisterInfo::isVirtualRegister(MO.getReg()))
VirtRegs.push_back(MO.getReg());
// Omit call-clobbered registers which aren't used anywhere. This makes
// call instructions much less noisy on targets where calls clobber lots
// of registers. Don't rely on MO.isDead() because we may be called before
@ -1330,6 +1343,24 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
}
}
// Print the regclass of any virtual registers encountered.
if (MRI && !VirtRegs.empty()) {
if (!HaveSemi) OS << ";"; HaveSemi = true;
for (unsigned i = 0; i != VirtRegs.size(); ++i) {
const TargetRegisterClass *RC = MRI->getRegClass(VirtRegs[i]);
OS << " " << RC->getName() << ":%reg" << VirtRegs[i];
for (unsigned j = i+1; j != VirtRegs.size();) {
if (MRI->getRegClass(VirtRegs[j]) != RC) {
++j;
continue;
}
if (VirtRegs[i] != VirtRegs[j])
OS << "," << VirtRegs[j];
VirtRegs.erase(VirtRegs.begin()+j);
}
}
}
if (!debugLoc.isUnknown() && MF) {
if (!HaveSemi) OS << ";";
OS << " dbg:";