[runtime] First step to sanitize regexp literal creation.

src/full-codegen/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 1441 matching lines @@
       __ CallRuntime(function_id, 2);
       __ bind(&done);
       context()->Plug(v0);
     }
   }
 }
 
 
 void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
   Comment cmnt(masm_, "[ RegExpLiteral");
-  Label materialized;
-  // Registers will be used as follows:
-  // t1 = materialized value (RegExp literal)
-  // t0 = JS function, literals array
-  // a3 = literal index
-  // a2 = RegExp pattern
-  // a1 = RegExp flags
-  // a0 = RegExp literal clone
-  __ lw(a0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
-  __ lw(t0, FieldMemOperand(a0, JSFunction::kLiteralsOffset));
-  int literal_offset = LiteralsArray::OffsetOfLiteralAt(expr->literal_index());
-  __ lw(t1, FieldMemOperand(t0, literal_offset));
-  __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-  __ Branch(&materialized, ne, t1, Operand(at));
-
-  // Create regexp literal using runtime function.
-  // Result will be in v0.
-  __ li(a3, Operand(Smi::FromInt(expr->literal_index())));
-  __ li(a2, Operand(expr->pattern()));
-  __ li(a1, Operand(expr->flags()));
-  __ Push(t0, a3, a2, a1);
-  __ CallRuntime(Runtime::kMaterializeRegExpLiteral, 4);
-  __ mov(t1, v0);
-
-  __ bind(&materialized);
-  int size = JSRegExp::kSize + JSRegExp::kInObjectFieldCount * kPointerSize;
-  Label allocated, runtime_allocate;
-  __ Allocate(size, v0, a2, a3, &runtime_allocate, TAG_OBJECT);
-  __ jmp(&allocated);
-
-  __ bind(&runtime_allocate);
-  __ li(a0, Operand(Smi::FromInt(size)));
-  __ Push(t1, a0);
-  __ CallRuntime(Runtime::kAllocateInNewSpace, 1);
-  __ pop(t1);
-
-  __ bind(&allocated);
-
-  // After this, registers are used as follows:
-  // v0: Newly allocated regexp.
-  // t1: Materialized regexp.
-  // a2: temp.
-  __ CopyFields(v0, t1, a2.bit(), size / kPointerSize);
+  __ lw(a3, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  __ li(a2, Operand(Smi::FromInt(expr->literal_index())));
+  __ li(a1, Operand(expr->pattern()));
+  __ li(a0, Operand(expr->flags()));
+  FastCloneRegExpStub stub(isolate());
+  __ CallStub(&stub);
   context()->Plug(v0);
 }
 
 
 void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) {
   Expression* expression = (property == NULL) ? NULL : property->value();
   if (expression == NULL) {
     __ LoadRoot(a1, Heap::kNullValueRootIndex);
     __ push(a1);
   } else {
@@ skipping 3497 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS