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Move TargetRegisterInfo::getSubReg() to MCRegisterInfo.

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Allows us to de-virtualize the function and provides access to it in
the instruction printer, which is useful for handling composite
physical registers (e.g., ARM register lists).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151815 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2012-03-01 17:30:39 +00:00
parent 194f3fa9ea
commit b3acdcc00c
3 changed files with 71 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
include/llvm/MC/MCRegisterInfo.h
View File

@@ -136,6 +136,9 @@ private:
const unsigned *Overlaps; // Pointer to the overlaps array
const unsigned *SubRegs; // Pointer to the subregs array
const unsigned *SuperRegs; // Pointer to the superregs array
const unsigned short *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
@@ -148,7 +151,9 @@ public:
void InitMCRegisterInfo(const MCRegisterDesc *D, unsigned NR, unsigned RA,
const MCRegisterClass *C, unsigned NC,
const unsigned *O, const unsigned *Sub,
const unsigned *Super) {
const unsigned *Super,
const unsigned short *SubIndices,
unsigned NumIndices) {
Desc = D;
NumRegs = NR;
RAReg = RA;
@@ -157,6 +162,8 @@ public:
SubRegs = Sub;
SuperRegs = Super;
NumClasses = NC;
SubRegIndices = SubIndices;
NumSubRegIndices = NumIndices;
}
/// mapLLVMRegToDwarfReg - Used to initialize LLVM register to Dwarf
@@ -234,6 +241,13 @@ public:
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);
}
/// 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

5
include/llvm/Target/TargetRegisterInfo.h
View File

@@ -383,11 +383,6 @@ public:
/// used by register scavenger to determine what registers are free.
virtual BitVector getReservedRegs(const MachineFunction &MF) const = 0;
/// getSubReg - Returns the physical register number of sub-register "Index"
/// for physical register RegNo. Return zero if the sub-register does not
/// exist.
virtual unsigned getSubReg(unsigned RegNo, unsigned Index) 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.