Crankshaft support for FixedDoubleArrays

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 22e7e413284ec1a0aba974981cc0fe750f5110e4..ea06064e5ebf2a0827594bc1389ee0bf7e7c9112 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -372,6 +372,15 @@ void LStoreKeyedFastElement::PrintDataTo(StringStream* stream) {
 }
 
 
+void LStoreKeyedFastDoubleElement::PrintDataTo(StringStream* stream) {
+  elements()->PrintTo(stream);
+  stream->Add("[");
+  key()->PrintTo(stream);
+  stream->Add("] <- ");
+  value()->PrintTo(stream);
+}
+
+
 void LStoreKeyedGeneric::PrintDataTo(StringStream* stream) {
   object()->PrintTo(stream);
   stream->Add("[");
@@ -1844,6 +1853,18 @@ LInstruction* LChunkBuilder::DoLoadKeyedFastElement(
 }
 
 
+LInstruction* LChunkBuilder::DoLoadKeyedFastDoubleElement(
+    HLoadKeyedFastDoubleElement* instr) {
+  ASSERT(instr->representation().IsDouble());
+  ASSERT(instr->key()->representation().IsInteger32());
+  LOperand* elements = UseTempRegister(instr->elements());
+  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+  LLoadKeyedFastDoubleElement* result =
+      new LLoadKeyedFastDoubleElement(elements, key);
+  return AssignEnvironment(DefineAsRegister(result));
+}
+
+
 LInstruction* LChunkBuilder::DoLoadKeyedSpecializedArrayElement(
     HLoadKeyedSpecializedArrayElement* instr) {
   JSObject::ElementsKind elements_kind = instr->elements_kind();
@@ -1897,6 +1918,20 @@ LInstruction* LChunkBuilder::DoStoreKeyedFastElement(
 }
 
 
+LInstruction* LChunkBuilder::DoStoreKeyedFastDoubleElement(
+    HStoreKeyedFastDoubleElement* instr) {
+  ASSERT(instr->value()->representation().IsDouble());
+  ASSERT(instr->elements()->representation().IsTagged());
+  ASSERT(instr->key()->representation().IsInteger32());
+
+  LOperand* elements = UseRegisterAtStart(instr->elements());
+  LOperand* val = UseTempRegister(instr->value());
+  LOperand* key = UseRegisterOrConstantAtStart(instr->key());
+
+  return new LStoreKeyedFastDoubleElement(elements, key, val);
+}
+
+
 LInstruction* LChunkBuilder::DoStoreKeyedSpecializedArrayElement(
     HStoreKeyedSpecializedArrayElement* instr) {
   Representation representation(instr->value()->representation());