commit 60bebed7a914dd01da6bfe7a633568ac596cd3e6
author Simon Pilgrim <llvm-dev@redking.me.uk> Wed Sep 19 11:18:49 2018 +0000
committer Simon Pilgrim <llvm-dev@redking.me.uk> Wed Sep 19 11:18:49 2018 +0000
tree 20e591f69229a07f1e877b1fd7b0ca310e238eba
parent ab1155a38d3e320723aa43091c3d284e3d902c17

[TableGen] CodeGenDAGPatterns::GenerateVariants - use BitVector::push_back()

As mentioned on D52236, this saves 10secs in debug builds of x86 -gen-dag-isel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@342536 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/CodeGenDAGPatterns.cpp

diff --git a/utils/TableGen/CodeGenDAGPatterns.cpp b/utils/TableGen/CodeGenDAGPatterns.cpp
index 8b92534..52a8310 100644
--- a/utils/TableGen/CodeGenDAGPatterns.cpp
+++ b/utils/TableGen/CodeGenDAGPatterns.cpp
@@ -4552,9 +4552,8 @@
       MatchedPredicates.push_back(Matches);
 
       // Add a new match the same as this pattern.
-      unsigned NumPatterns = PatternsToMatch.size();
       for (auto &P : MatchedPredicates)
-        P.resize(NumPatterns, P[i]);
+        P.push_back(P[i]);
     }
 
     LLVM_DEBUG(errs() << "\n");