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Add support for alternative register names, useful for instructions whose operands are logically equivalent to existing registers, but happen to be printed specially. For example, an instruciton that prints d0[0] instead of s0.

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Patch by Jim Grosbach.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133940 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2011-06-27 21:06:21 +00:00
parent d1f0bbee18
commit bea6f615ee
14 changed files with 268 additions and 55 deletions
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utils/TableGen/DAGISelMatcherGen.cpp
+11 -7
View File
@@ -224,6 +224,7 @@ void MatcherGen::EmitLeafMatchCode(const TreePatternNode *N) {
Record *LeafRec = DI->getDef();
if (// Handle register references. Nothing to do here, they always match.
LeafRec->isSubClassOf("RegisterClass") ||
LeafRec->isSubClassOf("RegisterOperand") ||
LeafRec->isSubClassOf("PointerLikeRegClass") ||
LeafRec->isSubClassOf("SubRegIndex") ||
// Place holder for SRCVALUE nodes. Nothing to do here.
@@ -579,15 +580,16 @@ void MatcherGen::EmitResultLeafAsOperand(const TreePatternNode *N,
// If this is an explicit register reference, handle it.
if (DefInit *DI = dynamic_cast<DefInit*>(N->getLeafValue())) {
if (DI->getDef()->isSubClassOf("Register")) {
Record *Def = DI->getDef();
if (Def->isSubClassOf("Register")) {
const CodeGenRegister *Reg =
CGP.getTargetInfo().getRegBank().getReg(DI->getDef());
CGP.getTargetInfo().getRegBank().getReg(Def);
AddMatcher(new EmitRegisterMatcher(Reg, N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
if (DI->getDef()->getName() == "zero_reg") {
if (Def->getName() == "zero_reg") {
AddMatcher(new EmitRegisterMatcher(0, N->getType(0)));
ResultOps.push_back(NextRecordedOperandNo++);
return;
@@ -595,16 +597,18 @@ void MatcherGen::EmitResultLeafAsOperand(const TreePatternNode *N,
// Handle a reference to a register class. This is used
// in COPY_TO_SUBREG instructions.
if (DI->getDef()->isSubClassOf("RegisterClass")) {
std::string Value = getQualifiedName(DI->getDef()) + "RegClassID";
if (Def->isSubClassOf("RegisterOperand"))
Def = Def->getValueAsDef("RegClass");
if (Def->isSubClassOf("RegisterClass")) {
std::string Value = getQualifiedName(Def) + "RegClassID";
AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;
}
// Handle a subregister index. This is used for INSERT_SUBREG etc.
if (DI->getDef()->isSubClassOf("SubRegIndex")) {
std::string Value = getQualifiedName(DI->getDef());
if (Def->isSubClassOf("SubRegIndex")) {
std::string Value = getQualifiedName(Def);
AddMatcher(new EmitStringIntegerMatcher(Value, MVT::i32));
ResultOps.push_back(NextRecordedOperandNo++);
return;