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The node wrapped in PatLeaf<> should be treated as a leaf even if it isn't

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one, i.e. don't select it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26909 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-03-20 22:53:06 +00:00
parent d97964457e
commit 863bf5afb0
1 changed files with 11 additions and 4 deletions
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15
utils/TableGen/DAGISelEmitter.cpp
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@ -2175,7 +2175,7 @@ public:
/// EmitResultCode - Emit the action for a pattern. Now that it has matched
/// we actually have to build a DAG!
std::pair<unsigned, unsigned>
EmitResultCode(TreePatternNode *N, bool isRoot = false) {
EmitResultCode(TreePatternNode *N, bool LikeLeaf = false, bool isRoot = false) {
// This is something selected from the pattern we matched.
if (!N->getName().empty()) {
assert(!isRoot && "Root of pattern cannot be a leaf!");
@ -2257,7 +2257,12 @@ public:
TmpNo = ResNo + NumRes;
} else {
emitDecl("Tmp" + utostr(ResNo));
emitCode("Select(Tmp" + utostr(ResNo) + ", " + Val + ");");
// This node, probably wrapped in a SDNodeXForms, behaves like a leaf
// node even if it isn't one. Don't select it.
if (LikeLeaf)
emitCode("Tmp" + utostr(ResNo) + " = " + Val + ";");
else
emitCode("Select(Tmp" + utostr(ResNo) + ", " + Val + ");");
}
// Add Tmp<ResNo> to VariableMap, so that we don't multiply select this
// value if used multiple times by this pattern result.
@ -2552,7 +2557,9 @@ public:
return std::make_pair(1, ResNo);
} else if (Op->isSubClassOf("SDNodeXForm")) {
assert(N->getNumChildren() == 1 && "node xform should have one child!");
unsigned OpVal = EmitResultCode(N->getChild(0)).second;
// PatLeaf node - the operand may or may not be a leaf node. But it should
// behave like one.
unsigned OpVal = EmitResultCode(N->getChild(0), true).second;
unsigned ResNo = TmpNo++;
emitDecl("Tmp" + utostr(ResNo));
emitCode("Tmp" + utostr(ResNo) + " = Transform_" + Op->getName()
@ -2748,7 +2755,7 @@ void DAGISelEmitter::GenerateCodeForPattern(PatternToMatch &Pattern,
// otherwise we are done.
} while (Emitter.InsertOneTypeCheck(Pat, Pattern.getSrcPattern(), "N"));
Emitter.EmitResultCode(Pattern.getDstPattern(), true /*the root*/);
Emitter.EmitResultCode(Pattern.getDstPattern(), false, true /*the root*/);
delete Pat;
}