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Sort sub-registers and super-registers lists according to super-sub register relations. e.g. X86::RAX sub-register list is EAX, AX, AL, AH (order of last two are not guaranteed).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49714 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2008-04-15 07:56:03 +00:00
parent c373221a08
commit 8102703d70
2 changed files with 33 additions and 6 deletions
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10
include/llvm/Target/TargetRegisterInfo.h
View File

@ -353,9 +353,10 @@ public:
return get(RegNo).AliasSet;
}
/// getSubRegisters - Return the set of registers that are sub-registers of
/// getSubRegisters - Return the list of registers that are sub-registers of
/// the specified register, or a null list of there are none. The list
/// returned is zero terminated.
/// 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;
@ -369,9 +370,10 @@ public:
return get(RegNo).ImmSubRegs;
}
/// getSuperRegisters - Return the set of registers that are super-registers
/// 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.
/// returned is zero terminated and sorted according to super-sub register
/// relations. e.g. X86::AL's super-register list is RAX, EAX, AX.
///
const unsigned *getSuperRegisters(unsigned RegNo) const {
return get(RegNo).SuperRegs;

29
utils/TableGen/RegisterInfoEmitter.cpp
View File

@ -153,6 +153,20 @@ static void addSubSuperReg(Record *R, Record *S,
addSubSuperReg(R, *I, SubRegs, SuperRegs, Aliases);
}
class RegisterSorter {
private:
std::map<Record*, std::set<Record*> > &RegisterSubRegs;
public:
RegisterSorter(std::map<Record*, std::set<Record*> > &RS)
: RegisterSubRegs(RS) {};
bool operator()(Record *RegA, Record *RegB) {
// B is sub-register of A.
return RegisterSubRegs.count(RegA) && RegisterSubRegs[RegA].count(RegB);
}
};
// RegisterInfoEmitter::run - Main register file description emitter.
//
void RegisterInfoEmitter::run(std::ostream &OS) {
@ -474,9 +488,14 @@ void RegisterInfoEmitter::run(std::ostream &OS) {
for (std::map<Record*, std::set<Record*> >::iterator
I = RegisterSubRegs.begin(), E = RegisterSubRegs.end(); I != E; ++I) {
OS << " const unsigned " << I->first->getName() << "_SubRegsSet[] = { ";
std::vector<Record*> SubRegsVector;
for (std::set<Record*>::iterator ASI = I->second.begin(),
E = I->second.end(); ASI != E; ++ASI)
OS << getQualifiedName(*ASI) << ", ";
SubRegsVector.push_back(*ASI);
RegisterSorter RS(RegisterSubRegs);
std::stable_sort(SubRegsVector.begin(), SubRegsVector.end(), RS);
for (unsigned i = 0, e = SubRegsVector.size(); i != e; ++i)
OS << getQualifiedName(SubRegsVector[i]) << ", ";
OS << "0 };\n";
}
@ -505,9 +524,15 @@ void RegisterInfoEmitter::run(std::ostream &OS) {
for (std::map<Record*, std::set<Record*> >::iterator
I = RegisterSuperRegs.begin(), E = RegisterSuperRegs.end(); I != E; ++I) {
OS << " const unsigned " << I->first->getName() << "_SuperRegsSet[] = { ";
std::vector<Record*> SuperRegsVector;
for (std::set<Record*>::iterator ASI = I->second.begin(),
E = I->second.end(); ASI != E; ++ASI)
OS << getQualifiedName(*ASI) << ", ";
SuperRegsVector.push_back(*ASI);
RegisterSorter RS(RegisterSubRegs);
std::stable_sort(SuperRegsVector.begin(), SuperRegsVector.end(), RS);
for (unsigned i = 0, e = SuperRegsVector.size(); i != e; ++i)
OS << getQualifiedName(SuperRegsVector[i]) << ", ";
OS << "0 };\n";
}