commit b67530e9b9531ad1d11620e512a001de80a5ec07
author Xinliang David Li <davidxl@google.com> Sun Jun 25 00:26:43 2017 +0000
committer Xinliang David Li <davidxl@google.com> Sun Jun 25 00:26:43 2017 +0000
tree 586ca9ffbf10a28fea3f963f941f01e75a4692ff
parent 91c8daf3009209a63534b4312d74322e1399bba1

[PGO] Implementate profile counter regiser promotion

Differential Revision: http://reviews.llvm.org/D34085

llvm-svn: 306231

llvm/lib/Transforms/IPO/PassManagerBuilder.cpp

diff --git a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
index c876123..087a8aa 100644
--- a/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
+++ b/llvm/lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -291,6 +291,8 @@
     InstrProfOptions Options;
     if (!PGOInstrGen.empty())
       Options.InstrProfileOutput = PGOInstrGen;
+    Options.DoCounterPromotion = true;
+    MPM.add(createLoopRotatePass());
     MPM.add(createInstrProfilingLegacyPass(Options));
   }
   if (!PGOInstrUse.empty())