Split HCompareGeneric in a test and a branch part.

src/hydrogen.h

Index: src/hydrogen.h
diff --git a/src/hydrogen.h b/src/hydrogen.h
index be23fa84c34fcf54dc58a33cb9f9613410232109..6c0a3f3f8f69f533d132d1c8e3e5b588f222d7c7 100644
--- a/src/hydrogen.h
+++ b/src/hydrogen.h
@@ -1209,6 +1209,19 @@ class HGraphBuilder {
 
   void AddSimulate(BailoutId id, RemovableSimulate removable = FIXED_SIMULATE);
 
+  HAndBranch* AndBranch(HInstruction* pluggable,

[titzer, 2013/10/10 14:05:25]

Need a better name than "pluggable"

+                        Token::Value condition,
+                        BailoutId bailout_id) {
+    ASSERT(pluggable->IsLinked());
+    if (pluggable->HasObservableSideEffects()) {
+      Push(pluggable);
+      AddSimulate(bailout_id, REMOVABLE_SIMULATE);
+      return New<HAndBranch>(Pop(), condition);
+    }
+    return New<HAndBranch>(pluggable, condition);
+  }
+
+
  protected:
   virtual bool BuildGraph() = 0;