Refactor and improve inlined double-aligned allocations

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index e7a5d28caefd17448d4e44e92f2c95b5c399d2b6..cc7ef294478ed38144299b60f8cf2c8613d3ee4b 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -35,18 +35,6 @@
 namespace v8 {
 namespace internal {
 
-// Flags used for the AllocateInNewSpace functions.
-enum AllocationFlags {
-  // No special flags.
-  NO_ALLOCATION_FLAGS = 0,
-  // Return the pointer to the allocated already tagged as a heap object.
-  TAG_OBJECT = 1 << 0,
-  // The content of the result register already contains the allocation top in
-  // new space.
-  RESULT_CONTAINS_TOP = 1 << 1
-};
-
-
 // Convenience for platform-independent signatures.  We do not normally
 // distinguish memory operands from other operands on ia32.
 typedef Operand MemOperand;
@@ -55,6 +43,12 @@ enum RememberedSetAction { EMIT_REMEMBERED_SET, OMIT_REMEMBERED_SET };
 enum SmiCheck { INLINE_SMI_CHECK, OMIT_SMI_CHECK };
 
 
+enum RegisterValueType {
+  REGISTER_VALUE_IS_SMI,
+  REGISTER_VALUE_IS_INT32
+};
+
+
 bool AreAliased(Register r1, Register r2, Register r3, Register r4);
 
 
@@ -576,6 +570,7 @@ class MacroAssembler: public Assembler {
   void AllocateInNewSpace(int header_size,
                           ScaleFactor element_size,
                           Register element_count,
+                          RegisterValueType element_count_type,
                           Register result,
                           Register result_end,
                           Register scratch,