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Add DataDep constructors. Explicitly check SSA form. 

llvm-svn: 161115
This commit is contained in:
Jakob Stoklund Olesen 2012-08-01 16:02:59 +00:00
parent b1c473998d
commit 5e19d35e9a
1 changed files with 18 additions and 20 deletions
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38
llvm/lib/CodeGen/MachineTraceMetrics.cpp
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@ -515,6 +515,20 @@ struct DataDep {
const MachineInstr *DefMI;
unsigned DefOp;
unsigned UseOp;
DataDep(const MachineInstr *DefMI, unsigned DefOp, unsigned UseOp)
: DefMI(DefMI), DefOp(DefOp), UseOp(UseOp) {}
/// Create a DataDep from an SSA form virtual register.
DataDep(const MachineRegisterInfo *MRI, unsigned VirtReg, unsigned UseOp)
: UseOp(UseOp) {
assert(TargetRegisterInfo::isVirtualRegister(VirtReg));
MachineRegisterInfo::def_iterator DefI = MRI->def_begin(VirtReg);
assert(!DefI.atEnd() && "Register has no defs");
DefMI = &*DefI;
DefOp = DefI.getOperandNo();
assert((++DefI).atEnd() && "Register has multiple defs");
}
};
}
@ -535,14 +549,8 @@ static bool getDataDeps(const MachineInstr *UseMI,
continue;
}
// Collect virtual register reads.
if (!MO->readsReg())
continue;
MachineRegisterInfo::def_iterator DefI = MRI->def_begin(Reg);
DataDep Dep;
Dep.DefMI = &*DefI;
Dep.DefOp = DefI.getOperandNo();
Dep.UseOp = MO.getOperandNo();
Deps.push_back(Dep);
if (MO->readsReg())
Deps.push_back(DataDep(MRI, Reg, MO.getOperandNo()));
}
return HasPhysRegs;
}
@ -561,13 +569,7 @@ static void getPHIDeps(const MachineInstr *UseMI,
for (unsigned i = 1; i != UseMI->getNumOperands(); i += 2) {
if (UseMI->getOperand(i + 1).getMBB() == Pred) {
unsigned Reg = UseMI->getOperand(i).getReg();
assert(TargetRegisterInfo::isVirtualRegister(Reg) && "Bad PHI op");
MachineRegisterInfo::def_iterator DefI = MRI->def_begin(Reg);
DataDep Dep;
Dep.DefMI = &*DefI;
Dep.DefOp = DefI.getOperandNo();
Dep.UseOp = i;
Deps.push_back(Dep);
Deps.push_back(DataDep(MRI, Reg, i));
return;
}
}
@ -617,11 +619,7 @@ static void updatePhysDepsDownwards(const MachineInstr *UseMI,
SparseSet<LiveRegUnit>::iterator I = RegUnits.find(*Units);
if (I == RegUnits.end())
continue;
DataDep Dep;
Dep.DefMI = I->DefMI;
Dep.DefOp = I->DefOp;
Dep.UseOp = MO.getOperandNo();
Deps.push_back(Dep);
Deps.push_back(DataDep(I->DefMI, I->DefOp, MO.getOperandNo()));
break;
}
}