return *(SubRegIndices + (Reg - 1) * NumSubRegIndices + Idx - 1);
}
+ /// getSubRegIndex - For a given register pair, return the sub-register index
+ /// if the second register is a sub-register of the first. Return zero
+ /// otherwise.
+ unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {
+ for (unsigned I = 1; I <= NumSubRegIndices; ++I)
+ if (getSubReg(RegNo, I) == SubRegNo)
+ return I;
+ return 0;
+ }
+
/// getSuperRegisters - Return the list of registers that are super-registers
/// of the specified register, or a null list of there are none. The list
/// returned is zero terminated and sorted according to super-sub register
/// used by register scavenger to determine what registers are free.
virtual BitVector getReservedRegs(const MachineFunction &MF) const = 0;
- /// getSubRegIndex - For a given register pair, return the sub-register index
- /// if the second register is a sub-register of the first. Return zero
- /// otherwise.
- virtual unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const = 0;
-
/// getMatchingSuperReg - Return a super-register of the specified register
/// Reg so its sub-register of index SubIdx is Reg.
unsigned getMatchingSuperReg(unsigned Reg, unsigned SubIdx,
<< "(unsigned RA, unsigned D = 0, unsigned E = 0);\n"
<< " virtual bool needsStackRealignment(const MachineFunction &) const\n"
<< " { return false; }\n"
- << " unsigned getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const;\n"
<< " unsigned composeSubRegIndices(unsigned, unsigned) const;\n"
<< " const TargetRegisterClass *"
"getSubClassWithSubReg(const TargetRegisterClass*, unsigned) const;\n"
std::string ClassName = Target.getName() + "GenRegisterInfo";
- OS << "unsigned " << ClassName
- << "::getSubRegIndex(unsigned RegNo, unsigned SubRegNo) const {\n";
- if (SubRegIndices.size()) {
- OS << " for (unsigned I = 1; I <= " << SubRegIndices.size() << "; ++I)\n"
- << " if (getSubReg(RegNo, I) == SubRegNo)\n"
- << " return I;\n";
- }
- OS << " return 0;\n";
- OS << "}\n\n";
-
// Emit composeSubRegIndices
OS << "unsigned " << ClassName
<< "::composeSubRegIndices(unsigned IdxA, unsigned IdxB) const {\n"