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add support for literal immediates in patterns to match, allowing us to

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write things like this:

def : Pat<(add GPRC:$in, 12),
          (ADD12 GPRC:$in)>;

Andrew: if this isn't enough or doesn't work for you, please lemme know.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23819 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-10-19 04:41:05 +00:00
parent f6cd147471
commit 2f041d49a9
1 changed files with 21 additions and 9 deletions
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30
utils/TableGen/DAGISelEmitter.cpp
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@ -1472,6 +1472,9 @@ static unsigned getPatternSize(TreePatternNode *P) {
TreePatternNode *Child = P->getChild(i);
if (!Child->isLeaf() && Child->getExtType() != MVT::Other)
Size += getPatternSize(Child);
else if (Child->isLeaf() && dynamic_cast<IntInit*>(Child->getLeafValue())) {
++Size; // Matches a ConstantSDNode.
}
}
return Size;
@ -1562,15 +1565,24 @@ void DAGISelEmitter::EmitMatchForPattern(TreePatternNode *N,
}
// Handle leaves of various types.
Init *LeafVal = Child->getLeafValue();
Record *LeafRec = dynamic_cast<DefInit*>(LeafVal)->getDef();
if (LeafRec->isSubClassOf("RegisterClass")) {
// Handle register references. Nothing to do here.
} else if (LeafRec->isSubClassOf("ValueType")) {
// Make sure this is the specified value type.
OS << " if (cast<VTSDNode>(" << RootName << i << ")->getVT() != "
<< "MVT::" << LeafRec->getName() << ") goto P" << PatternNo
<< "Fail;\n";
if (DefInit *DI = dynamic_cast<DefInit*>(Child->getLeafValue())) {
Record *LeafRec = DI->getDef();
if (LeafRec->isSubClassOf("RegisterClass")) {
// Handle register references. Nothing to do here.
} else if (LeafRec->isSubClassOf("ValueType")) {
// Make sure this is the specified value type.
OS << " if (cast<VTSDNode>(" << RootName << i << ")->getVT() != "
<< "MVT::" << LeafRec->getName() << ") goto P" << PatternNo
<< "Fail;\n";
} else {
Child->dump();
assert(0 && "Unknown leaf type!");
}
} else if (IntInit *II = dynamic_cast<IntInit*>(Child->getLeafValue())) {
OS << " if (!isa<ConstantSDNode>(" << RootName << i << ") ||\n"
<< " cast<ConstantSDNode>(" << RootName << i
<< ")->getValue() != " << II->getValue() << ")\n"
<< " goto P" << PatternNo << "Fail;\n";
} else {
Child->dump();
assert(0 && "Unknown leaf type!");