[turbofan] Factor out common switch-related code in instruction selectors.

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index 937ed4db34f2497686e1f12ed1b50f255c85c108..d5156106bb8b51e0ee452c725cd37d7b1a133d16 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -23,6 +23,16 @@ struct CallBuffer;  // TODO(bmeurer): Remove this.
 class FlagsContinuation;
 class Linkage;
 
+struct SwitchInfo {

[Benedikt Meurer, 2015/03/25 17:52:48]

Please move this struct to the -impl.h file, and add a forward declaration here.

[titzer, 2015/03/26 08:27:37]

Done.

+  int32_t min_value;
+  int32_t max_value;
+  size_t value_range;
+  size_t case_count;
+  int32_t* case_values;
+  BasicBlock** case_branches;
+  BasicBlock* default_branch;
+};
+
 typedef ZoneVector<InstructionOperand> InstructionOperandVector;
 
 
@@ -134,6 +144,10 @@ class InstructionSelector FINAL {
  private:
   friend class OperandGenerator;
 
+  void EmitTableSwitch(const SwitchInfo& sw, InstructionOperand& index_operand);
+  void EmitLookupSwitch(const SwitchInfo& sw,
+                        InstructionOperand& value_operand);
+
   // Inform the instruction selection that {node} was just defined.
   void MarkAsDefined(Node* node);
 
@@ -201,9 +215,7 @@ class InstructionSelector FINAL {
   void VisitCall(Node* call, BasicBlock* handler);
   void VisitGoto(BasicBlock* target);
   void VisitBranch(Node* input, BasicBlock* tbranch, BasicBlock* fbranch);
-  void VisitSwitch(Node* node, BasicBlock* default_branch,
-                   BasicBlock** case_branches, int32_t* case_values,
-                   size_t case_count, int32_t min_value, int32_t max_value);
+  void VisitSwitch(Node* node, const SwitchInfo& sw);
   void VisitDeoptimize(Node* value);
   void VisitReturn(Node* value);
   void VisitThrow(Node* value);