[llvm] r342536 - [TableGen] CodeGenDAGPatterns::GenerateVariants - use BitVector::push_back()

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Wed Sep 19 04:18:49 2018
New Revision: 342536

URL: http://llvm.org/viewvc/llvm-project?rev=342536&view=rev
Log:
[TableGen] CodeGenDAGPatterns::GenerateVariants - use BitVector::push_back()

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

Modified:
    llvm/trunk/utils/TableGen/CodeGenDAGPatterns.cpp

Modified: llvm/trunk/utils/TableGen/CodeGenDAGPatterns.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/utils/TableGen/CodeGenDAGPatterns.cpp?rev=342536&r1=342535&r2=342536&view=diff
==============================================================================
--- llvm/trunk/utils/TableGen/CodeGenDAGPatterns.cpp (original)
+++ llvm/trunk/utils/TableGen/CodeGenDAGPatterns.cpp Wed Sep 19 04:18:49 2018
@@ -4552,9 +4552,8 @@ void CodeGenDAGPatterns::GenerateVariant
       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");