commit 8f20bdb9d3b7516e75a7845e610105d87ce25ae6
author Calin Juravle <calin@google.com> Tue Apr 21 14:07:50 2015 +0100
committer Calin Juravle <calin@google.com> Wed Apr 22 12:13:44 2015 +0100
tree b55e5b7695e482dc66dda6a0175bb56251294baf
parent 641547a5f18ca2ea54469cceadcfef64f132e5e0

Run DCE again after all the other optimizations have run.

On docs this doubles the amount of instructions removed.

compiler/optimizing/optimizing_compiler.cc

diff --git a/compiler/optimizing/optimizing_compiler.cc b/compiler/optimizing/optimizing_compiler.cc
index 2ec8536..ab752c3 100644
--- a/compiler/optimizing/optimizing_compiler.cc
+++ b/compiler/optimizing/optimizing_compiler.cc
@@ -320,7 +320,8 @@
                              const DexCompilationUnit& dex_compilation_unit,
                              PassInfoPrinter* pass_info_printer,
                              StackHandleScopeCollection* handles) {
-  HDeadCodeElimination dce(graph);
+  HDeadCodeElimination dce1(graph, stats);
+  HDeadCodeElimination dce2(graph, stats);
   HConstantFolding fold1(graph);
   InstructionSimplifier simplify1(graph, stats);
   HBooleanSimplifier boolean_not(graph);
@@ -339,7 +340,7 @@
 
   HOptimization* optimizations[] = {
     &intrinsics,
-    &dce,
+    &dce1,
     &fold1,
     &simplify1,
     // BooleanSimplifier depends on the InstructionSimplifier removing redundant
@@ -352,7 +353,8 @@
     &licm,
     &bce,
     &type_propagation,
-    &simplify2
+    &simplify2,
+    &dce2,
   };
 
   RunOptimizations(optimizations, arraysize(optimizations), pass_info_printer);