Fast elements conversions in crankshaft using generated code.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index fe1641c374bc769d2bbb1bde13d2b6a5e2ec1e56..d67fd0946742a9c02798534497de6c6caa207e2d 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -7044,7 +7044,7 @@ void FastElementsConversionStub::GenerateSmiOnlyToObject(MacroAssembler* masm) {
 
 
 void FastElementsConversionStub::GenerateSmiOnlyToDouble(
-    MacroAssembler* masm, StrictModeFlag strict_mode) {
+    MacroAssembler* masm, Type type, StrictModeFlag strict_mode) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ebx    : target map
@@ -7102,7 +7102,15 @@ void FastElementsConversionStub::GenerateSmiOnlyToDouble(
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
   __ pop(ebx);
   __ pop(eax);
-  KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
+  if (type == TRANSITION_ONLY) {
+    __ pop(ebx);
+    __ push(edx);
+    __ push(ebx);  // return address
+    __ TailCallRuntime(Runtime::kTransitionElementsSmiToDouble, 1, 1);
+  } else {
+    ASSERT(type == TRANSITION_AND_STORE);
+    KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
+  }
 
   // Convert and copy elements
   // esi: source FixedArray
@@ -7159,11 +7167,16 @@ void FastElementsConversionStub::GenerateSmiOnlyToDouble(
                       OMIT_SMI_CHECK);
   // Restore esi.
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+
+  if (type == TRANSITION_ONLY) {
+    __ mov(eax, edx);
+    __ Ret();
+  }
 }
 
 
 void FastElementsConversionStub::GenerateDoubleToObject(
-    MacroAssembler* masm, StrictModeFlag strict_mode) {
+    MacroAssembler* masm, Type type, StrictModeFlag strict_mode) {
   // ----------- S t a t e -------------
   //  -- eax    : value
   //  -- ebx    : target map
@@ -7199,8 +7212,15 @@ void FastElementsConversionStub::GenerateDoubleToObject(
   __ pop(ebx);
   __ pop(edx);
   __ pop(eax);
-  KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
-
+  if (type == TRANSITION_ONLY) {
+    __ pop(ebx);
+    __ push(edx);
+    __ push(ebx);  // return address
+    __ TailCallRuntime(Runtime::kTransitionElementsDoubleToObject, 1, 1);
+  } else {
+    ASSERT(type == TRANSITION_AND_STORE);
+    KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
+  }
   // Box doubles into heap numbers.
   // edi: source FixedDoubleArray
   // eax: destination FixedArray
@@ -7270,6 +7290,11 @@ void FastElementsConversionStub::GenerateDoubleToObject(
   // Restore registers.
   __ pop(eax);
   __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
+
+  if (type == TRANSITION_ONLY) {
+    __ mov(eax, edx);
+    __ Ret();
+  }
 }
 
 #undef __