[llvm] r271159 - [PM] Reassociate: cache analyses more aggressively.
Davide Italiano via llvm-commits
llvm-commits at lists.llvm.org
Sat May 28 17:41:17 PDT 2016
Author: davide
Date: Sat May 28 19:41:17 2016
New Revision: 271159
URL: http://llvm.org/viewvc/llvm-project?rev=271159&view=rev
Log:
[PM] Reassociate: cache analyses more aggressively.
While here, add a FIXME for setPreserveCFG().
Modified:
llvm/trunk/lib/Transforms/Scalar/Reassociate.cpp
Modified: llvm/trunk/lib/Transforms/Scalar/Reassociate.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/Scalar/Reassociate.cpp?rev=271159&r1=271158&r2=271159&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/Scalar/Reassociate.cpp (original)
+++ llvm/trunk/lib/Transforms/Scalar/Reassociate.cpp Sat May 28 19:41:17 2016
@@ -2227,8 +2227,13 @@ PreservedAnalyses ReassociatePass::run(F
RankMap.clear();
ValueRankMap.clear();
- if (MadeChange)
- return PreservedAnalyses::none();
+ if (MadeChange) {
+ // FIXME: Reassociate should also 'preserve the CFG'.
+ // The new pass manager has currently no way to do it.
+ auto PA = PreservedAnalyses();
+ PA.preserve<GlobalsAA>();
+ return PA;
+ }
return PreservedAnalyses::all();
}
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