[regexp] Port RegExp.prototype[@@replace]

src/code-stub-assembler.h

 // Copyright 2016 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.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 340 matching lines @@
   // |length| and |offset| are expected to be tagged.
   compiler::Node* AllocateSlicedOneByteString(compiler::Node* length,
                                               compiler::Node* parent,
                                               compiler::Node* offset);
   // Allocate a SlicedTwoByteString with the given length, parent and offset.
   // |length| and |offset| are expected to be tagged.
   compiler::Node* AllocateSlicedTwoByteString(compiler::Node* length,
                                               compiler::Node* parent,
                                               compiler::Node* offset);
 
+  // Allocate a one-byte ConsString with the given length, first and second
+  // parts. |length| is expected to be tagged, and |first| and |second| are
+  // expected to be one-byte strings.
+  compiler::Node* AllocateOneByteConsString(compiler::Node* length,
+                                            compiler::Node* first,
+                                            compiler::Node* second);
+  // Allocate a two-byte ConsString with the given length, first and second
+  // parts. |length| is expected to be tagged, and |first| and |second| are
+  // expected to be two-byte strings.
+  compiler::Node* AllocateTwoByteConsString(compiler::Node* length,
+                                            compiler::Node* first,
+                                            compiler::Node* second);
+
   // Allocate a RegExpResult with the given length (the number of captures,
   // including the match itself), index (the index where the match starts),
   // and input string. |length| and |index| are expected to be tagged, and
   // |input| must be a string.
   compiler::Node* AllocateRegExpResult(compiler::Node* context,
                                        compiler::Node* length,
                                        compiler::Node* index,
                                        compiler::Node* input);
 
   // Allocate a JSArray without elements and initialize the header fields.
@@ skipping 40 matching lines @@
   // Copies |element_count| elements from |from_array| to |to_array| of
   // |capacity| size respecting both array's elements kinds.
   void CopyFixedArrayElements(
       ElementsKind from_kind, compiler::Node* from_array, ElementsKind to_kind,
       compiler::Node* to_array, compiler::Node* element_count,
       compiler::Node* capacity,
       WriteBarrierMode barrier_mode = UPDATE_WRITE_BARRIER,
       ParameterMode mode = INTEGER_PARAMETERS);
 
   // Copies |character_count| elements from |from_string| to |to_string|
-  // starting at the |from_index|'th character. |from_index| and
-  // |character_count| must be Smis s.t.
-  // 0 <= |from_index| <= |from_index| + |character_count| < from_string.length.
+  // starting at the |from_index|'th character. |from_string| and |to_string|
+  // must be either both one-byte strings or both two-byte strings.
+  // |from_index|, |to_index| and |character_count| must be Smis s.t.
+  // 0 <= |from_index| <= |from_index| + |character_count| <= from_string.length
+  // and
+  // 0 <= |to_index| <= |to_index| + |character_count| <= to_string.length.
   void CopyStringCharacters(compiler::Node* from_string,
                             compiler::Node* to_string,
                             compiler::Node* from_index,
+                            compiler::Node* to_index,
                             compiler::Node* character_count,
                             String::Encoding encoding);
 
   // Loads an element from |array| of |from_kind| elements by given |offset|
   // (NOTE: not index!), does a hole check if |if_hole| is provided and
   // converts the value so that it becomes ready for storing to array of
   // |to_kind| elements.
   compiler::Node* LoadElementAndPrepareForStore(compiler::Node* array,
                                                 compiler::Node* offset,
                                                 ElementsKind from_kind,
@@ skipping 70 matching lines @@
   // Load a character from a String (might flatten a ConsString).
   compiler::Node* StringCharCodeAt(compiler::Node* string,
                                    compiler::Node* smi_index);
   // Return the single character string with only {code}.
   compiler::Node* StringFromCharCode(compiler::Node* code);
   // Return a new string object which holds a substring containing the range
   // [from,to[ of string.  |from| and |to| are expected to be tagged.
   compiler::Node* SubString(compiler::Node* context, compiler::Node* string,
                             compiler::Node* from, compiler::Node* to);
 
+  // Return a new string object produced by concatenating |first| with |second|.
+  compiler::Node* StringConcat(compiler::Node* context, compiler::Node* first,
+                               compiler::Node* second);
+
+  // Return the first index >= {from} at which {needle_char} was found in
+  // {string}, or -1 if such an index does not exist. The returned value is
+  // a Smi, {string} is expected to be a String, {needle_char} is an intptr,
+  // and {from} is expected to be tagged.
+  compiler::Node* StringIndexOfChar(compiler::Node* context,
+                                    compiler::Node* string,
+                                    compiler::Node* needle_char,
+                                    compiler::Node* from);
+
   compiler::Node* StringFromCodePoint(compiler::Node* codepoint,
                                       UnicodeEncoding encoding);
 
   // Type conversion helpers.
   // Convert a String to a Number.
   compiler::Node* StringToNumber(compiler::Node* context,
                                  compiler::Node* input);
   // Convert an object to a name.
   compiler::Node* ToName(compiler::Node* context, compiler::Node* input);
   // Convert a Non-Number object to a Number.
@@ skipping 397 matching lines @@
                                            Label* bailout);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_