From 72bceff11a98cc1ecdb64a6fae16c521f99ec6a7 Mon Sep 17 00:00:00 2001
From: Roland Levillain <rpl@google.com>
Date: Mon, 15 Sep 2014 18:29:00 +0100
Subject: Initiate a dead code elimination pass in the optimizing compiler.

Change-Id: Ie9db5d8e2c2c30e34145a0f7d2386b8ec58cfc4e
---
 compiler/optimizing/nodes.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'compiler/optimizing/nodes.h')

diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h
index eebd64bbfc..9741f717fe 100644
--- a/compiler/optimizing/nodes.h
+++ b/compiler/optimizing/nodes.h
@@ -513,6 +513,11 @@ class SideEffects : public ValueObject {
     return SideEffects(((1 << count) - 1) << kFlagChangesCount);
   }
 
+  bool HasSideEffects() const {
+    size_t all_bits_set = (1 << kFlagChangesCount) - 1;
+    return (flags_ & all_bits_set) != 0;
+  }
+
  private:
   static constexpr int kFlagChangesSomething = 0;
   static constexpr int kFlagChangesCount = kFlagChangesSomething + 1;
@@ -564,6 +569,7 @@ class HInstruction : public ArenaObject {
 
   virtual bool NeedsEnvironment() const { return false; }
   virtual bool IsControlFlow() const { return false; }
+  bool HasSideEffects() const { return side_effects_.HasSideEffects(); }
 
   void AddUseAt(HInstruction* user, size_t index) {
     uses_ = new (block_->GetGraph()->GetArena()) HUseListNode<HInstruction>(user, index, uses_);
-- 
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