MIPS: Adapt hydrogen-based Array constructor to also support InternalArray and function call versio…

src/mips/builtins-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 480 matching lines @@
     __ And(t0, a2, Operand(kSmiTagMask));
     __ Assert(ne, "Unexpected initial map for InternalArray function",
               t0, Operand(zero_reg));
     __ GetObjectType(a2, a3, t0);
     __ Assert(eq, "Unexpected initial map for InternalArray function",
               t0, Operand(MAP_TYPE));
   }
 
   // Run the native code for the InternalArray function called as a normal
   // function.
-  ArrayNativeCode(masm, &generic_array_code);
+  if (FLAG_optimize_constructed_arrays) {
+    // Tail call a stub.
+    InternalArrayConstructorStub stub(masm->isolate());
+    __ TailCallStub(&stub);
+  } else {
+    ArrayNativeCode(masm, &generic_array_code);
 
-  // Jump to the generic array code if the specialized code cannot handle the
-  // construction.
-  __ bind(&generic_array_code);
-
-  Handle<Code> array_code =
-      masm->isolate()->builtins()->InternalArrayCodeGeneric();
-  __ Jump(array_code, RelocInfo::CODE_TARGET);
+    // Jump to the generic array code if the specialized code cannot handle the
+    // construction.
+    __ bind(&generic_array_code);
+    Handle<Code> array_code =
+        masm->isolate()->builtins()->InternalArrayCodeGeneric();
+    __ Jump(array_code, RelocInfo::CODE_TARGET);
+  }
 }
 
 
 void Builtins::Generate_ArrayCode(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a0     : number of arguments
   //  -- ra     : return address
   //  -- sp[...]: constructor arguments
   // -----------------------------------
   Label generic_array_code;
 
   // Get the Array function.
   GenerateLoadArrayFunction(masm, a1);
 
   if (FLAG_debug_code) {
     // Initial map for the builtin Array functions should be maps.
     __ lw(a2, FieldMemOperand(a1, JSFunction::kPrototypeOrInitialMapOffset));
     __ And(t0, a2, Operand(kSmiTagMask));
     __ Assert(ne, "Unexpected initial map for Array function (1)",
               t0, Operand(zero_reg));
     __ GetObjectType(a2, a3, t0);
     __ Assert(eq, "Unexpected initial map for Array function (2)",
               t0, Operand(MAP_TYPE));
   }
 
   // Run the native code for the Array function called as a normal function.
-  ArrayNativeCode(masm, &generic_array_code);
+  if (FLAG_optimize_constructed_arrays) {
+    // Tail call a stub.
+    Handle<Object> undefined_sentinel(
+        masm->isolate()->heap()->undefined_value(),
+        masm->isolate());
+    __ li(a2, Operand(undefined_sentinel));
+    ArrayConstructorStub stub(masm->isolate());
+    __ TailCallStub(&stub);
+  } else {
+    ArrayNativeCode(masm, &generic_array_code);
 
-  // Jump to the generic array code if the specialized code cannot handle
-  // the construction.
-  __ bind(&generic_array_code);
-
-  Handle<Code> array_code =
-      masm->isolate()->builtins()->ArrayCodeGeneric();
-  __ Jump(array_code, RelocInfo::CODE_TARGET);
+    // Jump to the generic array code if the specialized code cannot handle
+    // the construction.
+    __ bind(&generic_array_code);
+    Handle<Code> array_code =
+        masm->isolate()->builtins()->ArrayCodeGeneric();
+    __ Jump(array_code, RelocInfo::CODE_TARGET);
+  }
 }
 
 
 void Builtins::Generate_CommonArrayConstructCode(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- a0     : number of arguments
   //  -- a1     : constructor function
   //  -- a2     : type info cell
   //  -- ra     : return address
   //  -- sp[...]: constructor arguments
@@ skipping 1366 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(a3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS