commit a4b8c21dae70ae34aee13628632c39a675c06022
author David Brazdil <dbrazdil@google.com> Thu May 07 09:59:30 2015 +0100
committer David Brazdil <dbrazdil@google.com> Tue May 12 11:37:53 2015 +0100
tree 3a72a4fcb64d61b7913f6ee3599a46b3248437b6
parent faf935eb3a8565de98d9ec1f79c8c43c5c6eb2a7

ART: Rediscover loops after deleting blocks in DCE

The way DCE currently updates loop information does not cover all
cases. This patch removes the logic, resets loop information of live
blocks to pre-SSA state and reanalyzes the affected loops.

Change-Id: I0b996a70235b95a8db0de9a23a03f71db57a21b8

compiler/optimizing/graph_visualizer.cc

diff --git a/compiler/optimizing/graph_visualizer.cc b/compiler/optimizing/graph_visualizer.cc
index 7130127..f5c630b 100644
--- a/compiler/optimizing/graph_visualizer.cc
+++ b/compiler/optimizing/graph_visualizer.cc
@@ -17,6 +17,7 @@
 #include "graph_visualizer.h"
 
 #include "code_generator.h"
+#include "dead_code_elimination.h"
 #include "licm.h"
 #include "nodes.h"
 #include "optimization.h"
@@ -253,7 +254,8 @@
         }
       }
       output_ << " (liveness: " << instruction->GetLifetimePosition() << ")";
-    } else if (IsPass(LICM::kLoopInvariantCodeMotionPassName)) {
+    } else if (IsPass(LICM::kLoopInvariantCodeMotionPassName)
+               || IsPass(HDeadCodeElimination::kFinalDeadCodeEliminationPassName)) {
       output_ << " ( loop_header:";
       HLoopInformation* info = instruction->GetBlock()->GetLoopInformation();
       if (info == nullptr) {