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Emit type checks late instead of early, this encourages

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structural matching code to be factored and shared this
shrinks the X86 isel table from 86537 to 83890 bytes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97442 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-03-01 07:54:59 +00:00
parent 7d892d6e6d
commit 60c0e37afc
1 changed files with 6 additions and 1 deletions
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7
utils/TableGen/DAGISelMatcherGen.cpp
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@ -460,8 +460,9 @@ void MatcherGen::EmitMatchCode(const TreePatternNode *N,
// If N and NodeNoTypes don't agree on a type, then this is a case where we
// need to do a type check. Emit the check, apply the tyep to NodeNoTypes and
// reinfer any correlated types.
unsigned NodeType = EEVT::isUnknown;
if (NodeNoTypes->getExtTypes() != N->getExtTypes()) {
AddMatcher(new CheckTypeMatcher(N->getTypeNum(0)));
NodeType = N->getTypeNum(0);
NodeNoTypes->setTypes(N->getExtTypes());
InferPossibleTypes();
}
@ -488,6 +489,10 @@ void MatcherGen::EmitMatchCode(const TreePatternNode *N,
EmitLeafMatchCode(N);
else
EmitOperatorMatchCode(N, NodeNoTypes);
if (NodeType != EEVT::isUnknown)
AddMatcher(new CheckTypeMatcher((MVT::SimpleValueType)NodeType));
}
/// EmitMatcherCode - Generate the code that matches the predicate of this