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now that complexpatterns are all emitted at the end of the match

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sequence, just emit instruction predicates right before them.  This
exposes yet more factoring opportunitites, shrinking the X86 table 
to 79144 bytes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97704 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-03-04 01:25:36 +00:00
parent 57bf8a483e
commit 9752fb10a4
1 changed files with 3 additions and 4 deletions
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7
utils/TableGen/DAGISelMatcherGen.cpp
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@ -471,6 +471,9 @@ bool MatcherGen::EmitMatcherCode(unsigned Variant) {
if (Variant != 0) return true;
}
// Emit the matcher for the pattern structure and types.
EmitMatchCode(Pattern.getSrcPattern(), PatWithNoTypes);
// If the pattern has a predicate on it (e.g. only enabled when a subtarget
// feature is around, do the check).
// FIXME: This should get emitted after the match code below to encourage
@ -479,15 +482,11 @@ bool MatcherGen::EmitMatcherCode(unsigned Variant) {
// X86's MatchAddress.
if (!Pattern.getPredicateCheck().empty())
AddMatcher(new CheckPatternPredicateMatcher(Pattern.getPredicateCheck()));
// Emit the matcher for the pattern structure and types.
EmitMatchCode(Pattern.getSrcPattern(), PatWithNoTypes);
// Now that we've completed the structural type match, emit any ComplexPattern
// checks (e.g. addrmode matches). We emit this after the structural match
// because they are generally more expensive to evaluate and more difficult to
// factor.
// FIXME2: Can the patternpredicatematcher be moved to right before this??
for (unsigned i = 0, e = MatchedComplexPatterns.size(); i != e; ++i) {
const TreePatternNode *N = MatchedComplexPatterns[i].first;