Emit type checks late instead of early, this encourages
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
diff --git a/utils/TableGen/DAGISelMatcherGen.cpp b/utils/TableGen/DAGISelMatcherGen.cpp
index 62442d0..cc3c4f1 100644
--- a/utils/TableGen/DAGISelMatcherGen.cpp
+++ b/utils/TableGen/DAGISelMatcherGen.cpp
@@ -460,8 +460,9 @@
// 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 @@
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