Fix a CodeGenDAGPatterns bug. Check if top level predicates match when it's looking for duplicates.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74276 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 839059d..6a7d305 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -2390,6 +2390,10 @@
// Scan to see if an instruction or explicit pattern already matches this.
bool AlreadyExists = false;
for (unsigned p = 0, e = PatternsToMatch.size(); p != e; ++p) {
+ // Skip if the top level predicates do not match.
+ if (PatternsToMatch[i].getPredicates() !=
+ PatternsToMatch[p].getPredicates())
+ continue;
// Check to see if this variant already exists.
if (Variant->isIsomorphicTo(PatternsToMatch[p].getSrcPattern(), DepVars)) {
DOUT << " *** ALREADY EXISTS, ignoring variant.\n";