#define LLVM_MC_MCREGISTERINFO_H
#include "llvm/ADT/DenseMap.h"
+#include "llvm/Support/ErrorHandling.h"
#include <cassert>
namespace llvm {
/// MCRegisterClass - Base class of TargetRegisterClass.
class MCRegisterClass {
public:
- typedef const unsigned* iterator;
- typedef const unsigned* const_iterator;
-private:
- unsigned ID;
+ typedef const uint16_t* iterator;
+ typedef const uint16_t* const_iterator;
+
const char *Name;
- const unsigned RegSize, Alignment; // Size & Alignment of register in bytes
- const int CopyCost;
+ const iterator RegsBegin;
+ const uint8_t *const RegSet;
+ const uint8_t RegsSize;
+ const uint8_t RegSetSize;
+ const uint8_t ID;
+ const uint8_t RegSize, Alignment; // Size & Alignment of register in bytes
+ const int8_t CopyCost;
const bool Allocatable;
- const iterator RegsBegin, RegsEnd;
- const unsigned char *const RegSet;
- const unsigned RegSetSize;
-public:
- MCRegisterClass(unsigned id, const char *name,
- unsigned RS, unsigned Al, int CC, bool Allocable,
- iterator RB, iterator RE, const unsigned char *Bits,
- unsigned NumBytes)
- : ID(id), Name(name), RegSize(RS), Alignment(Al), CopyCost(CC),
- Allocatable(Allocable), RegsBegin(RB), RegsEnd(RE), RegSet(Bits),
- RegSetSize(NumBytes) {
- for (iterator i = RegsBegin; i != RegsEnd; ++i)
- assert(contains(*i) && "Bit field corrupted.");
- }
/// getID() - Return the register class ID number.
///
/// begin/end - Return all of the registers in this class.
///
iterator begin() const { return RegsBegin; }
- iterator end() const { return RegsEnd; }
+ iterator end() const { return RegsBegin + RegsSize; }
/// getNumRegs - Return the number of registers in this class.
///
- unsigned getNumRegs() const { return (unsigned)(RegsEnd-RegsBegin); }
+ unsigned getNumRegs() const { return RegsSize; }
/// getRegister - Return the specified register in the class.
///
bool contains(unsigned Reg) const {
unsigned InByte = Reg % 8;
unsigned Byte = Reg / 8;
- if (Byte > RegSetSize)
+ if (Byte >= RegSetSize)
return false;
return (RegSet[Byte] & (1 << InByte)) != 0;
}
/// of AX.
///
struct MCRegisterDesc {
- const char *Name; // Printable name for the reg (for debugging)
- const unsigned *Overlaps; // Overlapping registers, described above
- const unsigned *SubRegs; // Sub-register set, described above
- const unsigned *SuperRegs; // Super-register set, described above
+ const char *Name; // Printable name for the reg (for debugging)
+ uint16_t Overlaps; // Overlapping registers, described above
+ uint16_t SubRegs; // Sub-register set, described above
+ uint16_t SuperRegs; // Super-register set, described above
};
/// MCRegisterInfo base class - We assume that the target defines a static
unsigned RAReg; // Return address register
const MCRegisterClass *Classes; // Pointer to the regclass array
unsigned NumClasses; // Number of entries in the array
+ const uint16_t *Overlaps; // Pointer to the overlaps array
+ const uint16_t *SubRegs; // Pointer to the subregs array
+ const uint16_t *SuperRegs; // Pointer to the superregs array
+ const uint16_t *SubRegIndices; // Pointer to the subreg lookup
+ // array.
+ unsigned NumSubRegIndices; // Number of subreg indices.
DenseMap<unsigned, int> L2DwarfRegs; // LLVM to Dwarf regs mapping
DenseMap<unsigned, int> EHL2DwarfRegs; // LLVM to Dwarf regs mapping EH
DenseMap<unsigned, unsigned> Dwarf2LRegs; // Dwarf to LLVM regs mapping
/// InitMCRegisterInfo - Initialize MCRegisterInfo, called by TableGen
/// auto-generated routines. *DO NOT USE*.
void InitMCRegisterInfo(const MCRegisterDesc *D, unsigned NR, unsigned RA,
- const MCRegisterClass *C, unsigned NC) {
+ const MCRegisterClass *C, unsigned NC,
+ const uint16_t *O, const uint16_t *Sub,
+ const uint16_t *Super,
+ const uint16_t *SubIndices,
+ unsigned NumIndices) {
Desc = D;
NumRegs = NR;
RAReg = RA;
Classes = C;
+ Overlaps = O;
+ SubRegs = Sub;
+ SuperRegs = Super;
NumClasses = NC;
+ SubRegIndices = SubIndices;
+ NumSubRegIndices = NumIndices;
}
/// mapLLVMRegToDwarfReg - Used to initialize LLVM register to Dwarf
else
L2DwarfRegs[LLVMReg] = DwarfReg;
}
-
+
/// mapDwarfRegToLLVMReg - Used to initialize Dwarf register to LLVM
/// register number mapping. Called by TableGen auto-generated routines.
/// *DO NOT USE*.
else
Dwarf2LRegs[DwarfReg] = LLVMReg;
}
-
+
/// mapLLVMRegToSEHReg - Used to initialize LLVM register to SEH register
/// number mapping. By default the SEH register number is just the same
/// as the LLVM register number.
/// register, or a null list of there are none. The list returned is zero
/// terminated.
///
- const unsigned *getAliasSet(unsigned RegNo) const {
+ const uint16_t *getAliasSet(unsigned RegNo) const {
// The Overlaps set always begins with Reg itself.
- return get(RegNo).Overlaps + 1;
+ return Overlaps + get(RegNo).Overlaps + 1;
}
/// getOverlaps - Return a list of registers that overlap Reg, including
/// list.
/// These are exactly the registers in { x | regsOverlap(x, Reg) }.
///
- const unsigned *getOverlaps(unsigned RegNo) const {
- return get(RegNo).Overlaps;
+ const uint16_t *getOverlaps(unsigned RegNo) const {
+ return Overlaps + get(RegNo).Overlaps;
}
/// getSubRegisters - Return the list of registers that are sub-registers of
/// returned is zero terminated and sorted according to super-sub register
/// relations. e.g. X86::RAX's sub-register list is EAX, AX, AL, AH.
///
- const unsigned *getSubRegisters(unsigned RegNo) const {
- return get(RegNo).SubRegs;
+ const uint16_t *getSubRegisters(unsigned RegNo) const {
+ return SubRegs + get(RegNo).SubRegs;
+ }
+
+ /// getSubReg - Returns the physical register number of sub-register "Index"
+ /// for physical register RegNo. Return zero if the sub-register does not
+ /// exist.
+ unsigned getSubReg(unsigned Reg, unsigned Idx) const {
+ return *(SubRegIndices + (Reg - 1) * NumSubRegIndices + Idx - 1);
+ }
+
+ /// 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,
+ const MCRegisterClass *RC) const {
+ for (const uint16_t *SRs = getSuperRegisters(Reg); unsigned SR = *SRs;++SRs)
+ if (Reg == getSubReg(SR, SubIdx) && RC->contains(SR))
+ return SR;
+ return 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.
+ 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
/// returned is zero terminated and sorted according to super-sub register
/// relations. e.g. X86::AL's super-register list is AX, EAX, RAX.
///
- const unsigned *getSuperRegisters(unsigned RegNo) const {
- return get(RegNo).SuperRegs;
+ const uint16_t *getSuperRegisters(unsigned RegNo) const {
+ return SuperRegs + get(RegNo).SuperRegs;
}
/// getName - Return the human-readable symbolic target-specific name for the
const DenseMap<unsigned, unsigned> &M = isEH ? EHDwarf2LRegs : Dwarf2LRegs;
const DenseMap<unsigned, unsigned>::const_iterator I = M.find(RegNum);
if (I == M.end()) {
- assert(0 && "Invalid RegNum");
- return -1;
+ llvm_unreachable("Invalid RegNum");
}
return I->second;
}
return Classes[i];
}
};
-
+
} // End llvm namespace
#endif