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improve comments on OPC_Record to say what we're recording a node.

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llvm-svn: 96433
This commit is contained in:
Chris Lattner 2010-02-17 01:03:09 +00:00
parent 2a4208c74e
commit ab430d225c
3 changed files with 11 additions and 3 deletions
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8
utils/TableGen/DAGISelMatcher.h
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@ -127,8 +127,14 @@ public:
/// RecordMatcherNode - Save the current node in the operand list. /// RecordMatcherNode - Save the current node in the operand list.
class RecordMatcherNode : public MatcherNodeWithChild { class RecordMatcherNode : public MatcherNodeWithChild {
/// WhatFor - This is a string indicating why we're recording this. This
/// should only be used for comment generation not anything semantic.
std::string WhatFor;
public: public:
RecordMatcherNode() : MatcherNodeWithChild(Record) {} RecordMatcherNode(StringRef whatfor)
: MatcherNodeWithChild(Record), WhatFor(whatfor) {}
StringRef getWhatFor() const { return WhatFor; }
static inline bool classof(const MatcherNode *N) { static inline bool classof(const MatcherNode *N) {
return N->getKind() == Record; return N->getKind() == Record;

4
utils/TableGen/DAGISelMatcherEmitter.cpp
View File

@ -126,7 +126,9 @@ EmitMatcher(const MatcherNode *N, unsigned Indent) {
OS.PadToColumn(Indent*2) << "OPC_Emit, /*XXX*/\n\n"; OS.PadToColumn(Indent*2) << "OPC_Emit, /*XXX*/\n\n";
return 1; return 1;
case MatcherNode::Record: case MatcherNode::Record:
OS << "OPC_Record,\n"; OS << "OPC_Record,";
OS.PadToColumn(CommentIndent) << "// "
<< cast<RecordMatcherNode>(N)->getWhatFor() << '\n';
return 1; return 1;
case MatcherNode::MoveChild: case MatcherNode::MoveChild:
OS << "OPC_MoveChild, " OS << "OPC_MoveChild, "

2
utils/TableGen/DAGISelMatcherGen.cpp
View File

@ -288,7 +288,7 @@ void MatcherGen::EmitMatchCode(const TreePatternNode *N,
NumRecorded += 2; // Input and output chains. NumRecorded += 2; // Input and output chains.
} else { } else {
// If it is a normal named node, we must emit a 'Record' opcode. // If it is a normal named node, we must emit a 'Record' opcode.
AddMatcherNode(new RecordMatcherNode()); AddMatcherNode(new RecordMatcherNode(N->getName()));
NumRecorded = 1; NumRecorded = 1;
} }
NextRecordedOperandNo += NumRecorded; NextRecordedOperandNo += NumRecorded;