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just like they can opt into getting the root of the pattern being

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matched, allow ComplexPatterns to opt into getting the parent node
of the operand being matched.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114472 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-09-21 20:37:12 +00:00
parent 52a261b3c1
commit 78d3af47f5
3 changed files with 13 additions and 3 deletions
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3
include/llvm/CodeGen/SelectionDAGISel.h
View File

@ -254,7 +254,8 @@ public:
return 0;
}
virtual bool CheckComplexPattern(SDNode *Root, SDValue N, unsigned PatternNo,
virtual bool CheckComplexPattern(SDNode *Root, SDNode *Parent, SDValue N,
unsigned PatternNo,
SmallVectorImpl<SDValue> &Result) {
assert(0 && "Tblgen should generate the implementation of this!");
return false;

6
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -2086,7 +2086,11 @@ SelectCodeCommon(SDNode *NodeToMatch, const unsigned char *MatcherTable,
unsigned CPNum = MatcherTable[MatcherIndex++];
unsigned RecNo = MatcherTable[MatcherIndex++];
assert(RecNo < RecordedNodes.size() && "Invalid CheckComplexPat");
if (!CheckComplexPattern(NodeToMatch, RecordedNodes[RecNo], CPNum,
SDNode *Parent = 0;
if (NodeStack.size() > 1)
Parent = NodeStack[NodeStack.size()-2].getNode();
if (!CheckComplexPattern(NodeToMatch, Parent, RecordedNodes[RecNo], CPNum,
RecordedNodes))
break;
continue;

7
utils/TableGen/DAGISelMatcherEmitter.cpp
View File

@ -633,7 +633,7 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
// Emit CompletePattern matchers.
// FIXME: This should be const.
if (!ComplexPatterns.empty()) {
OS << "bool CheckComplexPattern(SDNode *Root, SDValue N,\n";
OS << "bool CheckComplexPattern(SDNode *Root, SDNode *Parent, SDValue N,\n";
OS << " unsigned PatternNo, SmallVectorImpl<SDValue> &Result) {\n";
OS << " unsigned NextRes = Result.size();\n";
OS << " switch (PatternNo) {\n";
@ -655,6 +655,11 @@ void MatcherTableEmitter::EmitPredicateFunctions(formatted_raw_ostream &OS) {
if (P.hasProperty(SDNPWantRoot))
OS << "Root, ";
// If the complex pattern wants the parent of the operand being matched,
// pass it in as the next argument.
if (P.hasProperty(SDNPWantParent))
OS << "Parent, ";
OS << "N";
for (unsigned i = 0; i != NumOps; ++i)
OS << ", Result[NextRes+" << i << ']';