Introduce a class to implement optimization passes.

- Add art::HOptimization.
- Rename art::ConstantPropagation to art::HConstantFolding in
  compiler/optimizing/constant_folding.h to avoid name
  clashes with a class of the same name in
  compiler/dex/post_opt_passes.h.
- Rename art::DeadCodeElimination to
  art::HDeadCodeElimination for consistency reasons.
- Have art::HDeadCodeElimination and art::HConstantFolding
  derive from art::HOptimization.
- Start to use these optimizations in
  art:OptimizingCompiler::TryCompile.

Change-Id: Iaab350c122d87b2333b3760312b15c0592d7e010

1 files changed, 9 insertions, 7 deletions

diff --git a/compiler/optimizing/dead_code_elimination.h b/compiler/optimizing/dead_code_elimination.h
index 48739be494..a4446ae04d 100644
--- a/compiler/optimizing/dead_code_elimination.h
+++ b/compiler/optimizing/dead_code_elimination.h
@@ -18,6 +18,7 @@
 #define ART_COMPILER_OPTIMIZING_DEAD_CODE_ELIMINATION_H_
 
 #include "nodes.h"
+#include "optimization.h"
 
 namespace art {
 
@@ -25,17 +26,18 @@ namespace art {
  * Optimization pass performing dead code elimination (removal of
  * unused variables/instructions) on the SSA form.
  */
-class DeadCodeElimination : public ValueObject {
+class HDeadCodeElimination : public HOptimization {
  public:
-  explicit DeadCodeElimination(HGraph* graph)
-      : graph_(graph) {}
+  HDeadCodeElimination(HGraph* graph, const HGraphVisualizer& visualizer)
+      : HOptimization(graph, true, kDeadCodeEliminationPassName, visualizer) {}
 
-  void Run();
+  virtual void Run() OVERRIDE;
 
- private:
-  HGraph* const graph_;
+  static constexpr const char* kDeadCodeEliminationPassName =
+    "dead_code_elimination";
 
-  DISALLOW_COPY_AND_ASSIGN(DeadCodeElimination);
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HDeadCodeElimination);
 };
 
 }  // namespace art