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Compress register lists by sharing suffixes.

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TableGen emits lists of sub-registers, super-registers, and overlaps. Put
them all in a single table and use a SequenceToOffsetTable to share
suffixes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153761 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2012-03-30 17:25:43 +00:00
parent 184440e808
commit 8f36b0b139
2 changed files with 72 additions and 96 deletions
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19
include/llvm/MC/MCRegisterInfo.h
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@@ -133,9 +133,7 @@ private:
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 *RegLists; // Pointer to the reglists array
const uint16_t *SubRegIndices; // Pointer to the subreg lookup
// array.
unsigned NumSubRegIndices; // Number of subreg indices.
@@ -150,17 +148,14 @@ public:
/// auto-generated routines. *DO NOT USE*.
void InitMCRegisterInfo(const MCRegisterDesc *D, unsigned NR, unsigned RA,
const MCRegisterClass *C, unsigned NC,
const uint16_t *O, const uint16_t *Sub,
const uint16_t *Super,
const uint16_t *RL,
const uint16_t *SubIndices,
unsigned NumIndices) {
Desc = D;
NumRegs = NR;
RAReg = RA;
Classes = C;
Overlaps = O;
SubRegs = Sub;
SuperRegs = Super;
RegLists = RL;
NumClasses = NC;
SubRegIndices = SubIndices;
NumSubRegIndices = NumIndices;
@@ -220,7 +215,7 @@ public:
///
const uint16_t *getAliasSet(unsigned RegNo) const {
// The Overlaps set always begins with Reg itself.
return Overlaps + get(RegNo).Overlaps + 1;
return RegLists + get(RegNo).Overlaps + 1;
}
/// getOverlaps - Return a list of registers that overlap Reg, including
@@ -229,7 +224,7 @@ public:
/// These are exactly the registers in { x | regsOverlap(x, Reg) }.
///
const uint16_t *getOverlaps(unsigned RegNo) const {
return Overlaps + get(RegNo).Overlaps;
return RegLists + get(RegNo).Overlaps;
}
/// getSubRegisters - Return the list of registers that are sub-registers of
@@ -238,7 +233,7 @@ public:
/// relations. e.g. X86::RAX's sub-register list is EAX, AX, AL, AH.
///
const uint16_t *getSubRegisters(unsigned RegNo) const {
return SubRegs + get(RegNo).SubRegs;
return RegLists + get(RegNo).SubRegs;
}
/// getSubReg - Returns the physical register number of sub-register "Index"
@@ -274,7 +269,7 @@ public:
/// relations. e.g. X86::AL's super-register list is AX, EAX, RAX.
///
const uint16_t *getSuperRegisters(unsigned RegNo) const {
return SuperRegs + get(RegNo).SuperRegs;
return RegLists + get(RegNo).SuperRegs;
}
/// getName - Return the human-readable symbolic target-specific name for the