TargetRegisterInfo::TargetRegisterInfo(const TargetRegisterDesc *D, unsigned NR,
regclass_iterator RCB, regclass_iterator RCE,
- int CFSO, int CFDO)
- : Desc(D), NumRegs(NR), RegClassBegin(RCB), RegClassEnd(RCE) {
+ int CFSO, int CFDO,
+ const unsigned* subregs, const unsigned subregsize)
+ : SubregHash(subregs), SubregHashSize(subregsize), Desc(D), NumRegs(NR),
+ RegClassBegin(RCB), RegClassEnd(RCE) {
assert(NumRegs < FirstVirtualRegister &&
"Target has too many physical registers!");
TargetRegisterInfo::~TargetRegisterInfo() {}
-namespace {
- // Sort according to super- / sub- class relations.
- // i.e. super- register class < sub- register class.
- struct RCCompare {
- bool operator()(const TargetRegisterClass* const &LHS,
- const TargetRegisterClass* const &RHS) {
- return RHS->hasSuperClass(LHS);
- }
- };
-}
-
/// getPhysicalRegisterRegClass - Returns the Register Class of a physical
/// register of the given type. If type is MVT::Other, then just return any
/// register class the register belongs to.
const TargetRegisterClass *
-TargetRegisterInfo::getPhysicalRegisterRegClass(unsigned reg,
- MVT::ValueType VT) const {
+TargetRegisterInfo::getPhysicalRegisterRegClass(unsigned reg, MVT VT) const {
assert(isPhysicalRegister(reg) && "reg must be a physical register");
- // Pick the register class of the right type that contains this physreg.
- SmallVector<const TargetRegisterClass*, 4> RCs;
- for (regclass_iterator I = regclass_begin(), E = regclass_end(); I != E; ++I) {
- if ((VT == MVT::Other || (*I)->hasType(VT)) && (*I)->contains(reg))
- RCs.push_back(*I);
- }
-
- if (RCs.size() == 1)
- return RCs[0];
-
- if (RCs.size()) {
- // Multiple compatible register classes. Get the super- class.
- std::stable_sort(RCs.begin(), RCs.end(), RCCompare());
- return RCs[0];
+ // Pick the most super register class of the right type that contains
+ // this physreg.
+ const TargetRegisterClass* BestRC = 0;
+ for (regclass_iterator I = regclass_begin(), E = regclass_end(); I != E; ++I){
+ const TargetRegisterClass* RC = *I;
+ if ((VT == MVT::Other || RC->hasType(VT)) && RC->contains(reg) &&
+ (!BestRC || BestRC->hasSuperClass(RC)))
+ BestRC = RC;
}
- assert(false && "Couldn't find the register class");
- return 0;
+ assert(BestRC && "Couldn't find the register class");
+ return BestRC;
}
/// getAllocatableSetForRC - Toggle the bits that represent allocatable