// Add a reg, but keep track of whether the vector reallocated or not.
void *ArrayBase = VRegInfo.empty() ? 0 : &VRegInfo[0];
VRegInfo.push_back(std::make_pair(RegClass, (MachineOperand*)0));
- RegAllocHints.push_back(std::make_pair(RA_None, 0));
+ RegAllocHints.push_back(std::make_pair(0, 0));
if (!((&VRegInfo[0] == ArrayBase || VRegInfo.size() == 1)))
// The vector reallocated, handle this now.
MachineInstr *MachineRegisterInfo::getVRegDef(unsigned Reg) const {
assert(Reg-TargetRegisterInfo::FirstVirtualRegister < VRegInfo.size() &&
"Invalid vreg!");
- for (reg_iterator I = reg_begin(Reg), E = reg_end(); I != E; ++I) {
- // Since we are in SSA form, we can stop at the first definition.
- if (I.getOperand().isDef())
- return &*I;
- }
+ // Since we are in SSA form, we can use the first definition.
+ if (!def_empty(Reg))
+ return &*def_begin(Reg);
return 0;
}