Small changes in preparation for Hydrogen-generated KeyedLoadGeneric

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/303583002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21535 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/lithium-arm.h

@@ -424,6 +424,7 @@ class LDummyUse V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 
 class LDeoptimize V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
+  virtual bool IsControl() const V8_OVERRIDE { return true; }
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
   DECLARE_HYDROGEN_ACCESSOR(Deoptimize)
 };

src/arm64/lithium-arm64.h

@@ -1288,6 +1288,7 @@ class LDeclareGlobals V8_FINAL : public LTemplateInstruction<0, 1, 0> {
 
 class LDeoptimize V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
+  virtual bool IsControl() const V8_OVERRIDE { return true; }
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
   DECLARE_HYDROGEN_ACCESSOR(Deoptimize)
 };

src/hydrogen-instructions.cc

@@ -2904,6 +2904,7 @@ bool HConstant::EmitAtUses() {
   if (UseCount() == 0) return true;
   if (IsCell()) return false;
   if (representation().IsDouble()) return false;
+  if (representation().IsExternal()) return false;
   return true;
 }
 

src/hydrogen-instructions.h

@@ -7777,6 +7777,8 @@ class HForInCacheArray V8_FINAL : public HTemplateInstruction<2> {
 
 class HLoadFieldByIndex V8_FINAL : public HTemplateInstruction<2> {
  public:
+  DECLARE_INSTRUCTION_FACTORY_P2(HLoadFieldByIndex, HValue*, HValue*);
+
   HLoadFieldByIndex(HValue* object,
                     HValue* index) {
     SetOperandAt(0, object);
@@ -7786,7 +7788,11 @@ class HLoadFieldByIndex V8_FINAL : public HTemplateInstruction<2> {
   }
 
   virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
+    if (index == 1) {
+      return Representation::Smi();
+    } else {
+      return Representation::Tagged();
+    }
   }
 
   HValue* object() { return OperandAt(0); }

src/ia32/lithium-ia32.h

@@ -415,6 +415,7 @@ class LDummyUse V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 
 class LDeoptimize V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
+  virtual bool IsControl() const V8_OVERRIDE { return true; }
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
   DECLARE_HYDROGEN_ACCESSOR(Deoptimize)
 };

src/mips/lithium-mips.h

@@ -421,6 +421,7 @@ class LDummyUse V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 
 class LDeoptimize V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
+  virtual bool IsControl() const V8_OVERRIDE { return true; }
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
   DECLARE_HYDROGEN_ACCESSOR(Deoptimize)
 };

src/x64/lithium-x64.h

@@ -429,6 +429,7 @@ class LDummyUse V8_FINAL : public LTemplateInstruction<1, 1, 0> {
 
 class LDeoptimize V8_FINAL : public LTemplateInstruction<0, 0, 0> {
  public:
+  virtual bool IsControl() const V8_OVERRIDE { return true; }
   DECLARE_CONCRETE_INSTRUCTION(Deoptimize, "deoptimize")
   DECLARE_HYDROGEN_ACCESSOR(Deoptimize)
 };