[stubs] Port StringAddStub to TF

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 83 matching lines @@
 #define HEAP_CONSTANT_TEST(rootName, name) \
   compiler::Node* Is##name(compiler::Node* value);
   HEAP_CONSTANT_LIST(HEAP_CONSTANT_TEST)
 #undef HEAP_CONSTANT_TEST
 
   compiler::Node* HashSeed();
   compiler::Node* StaleRegisterConstant();
 
   compiler::Node* IntPtrOrSmiConstant(int value, ParameterMode mode);
 
+  compiler::Node* IntPtrAddFoldConstants(compiler::Node* left,
+                                         compiler::Node* right);
+  compiler::Node* IntPtrSubFoldConstants(compiler::Node* left,
+                                         compiler::Node* right);
+
   // Float64 operations.
   compiler::Node* Float64Ceil(compiler::Node* x);
   compiler::Node* Float64Floor(compiler::Node* x);
   compiler::Node* Float64Round(compiler::Node* x);
   compiler::Node* Float64Trunc(compiler::Node* x);
 
   // Tag a Word as a Smi value.
   compiler::Node* SmiTag(compiler::Node* value);
   // Untag a Smi value as a Word.
   compiler::Node* SmiUntag(compiler::Node* value);
@@ skipping 220 matching lines @@
   compiler::Node* StoreFixedDoubleArrayElement(
       compiler::Node* object, compiler::Node* index, compiler::Node* value,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
 
   // Allocate a HeapNumber without initializing its value.
   compiler::Node* AllocateHeapNumber(MutableMode mode = IMMUTABLE);
   // Allocate a HeapNumber with a specific value.
   compiler::Node* AllocateHeapNumberWithValue(compiler::Node* value,
                                               MutableMode mode = IMMUTABLE);
   // Allocate a SeqOneByteString with the given length.
-  compiler::Node* AllocateSeqOneByteString(int length);
+  compiler::Node* AllocateSeqOneByteString(int length,
+                                           AllocationFlags flags = kNone);
   compiler::Node* AllocateSeqOneByteString(compiler::Node* context,
-                                           compiler::Node* length);
+                                           compiler::Node* length,
+                                           AllocationFlags flags = kNone);
   // Allocate a SeqTwoByteString with the given length.
-  compiler::Node* AllocateSeqTwoByteString(int length);
+  compiler::Node* AllocateSeqTwoByteString(int length,
+                                           AllocationFlags flags = kNone);
   compiler::Node* AllocateSeqTwoByteString(compiler::Node* context,
-                                           compiler::Node* length);
+                                           compiler::Node* length,
+                                           AllocationFlags flags = kNone);
 
   // Allocate a SlicedOneByteString with the given length, parent and offset.
   // |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,
@@ skipping 67 matching lines @@
   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_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.

[jgruber, 2016/10/13 14:10:16]

Comment should be updated (or removed) to reflect ParameterMode (previously it
just assumed smi parameters).

[danno, 2016/10/17 14:23:26]

Done.

   // 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);
+                            String::Encoding encoding, ParameterMode mode);
 
   // 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,
                                                 ElementsKind to_kind,
                                                 Label* if_hole);
@@ skipping 98 matching lines @@
   compiler::Node* NumberToString(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.
   compiler::Node* NonNumberToNumber(compiler::Node* context,
                                     compiler::Node* input);
   // Convert any object to a Number.
   compiler::Node* ToNumber(compiler::Node* context, compiler::Node* input);
 
+  // Convert any object to a String.
+  compiler::Node* ToString(compiler::Node* context, compiler::Node* input);
+
+  // Convert any object to a Primitive.
+  compiler::Node* JSReceiverToPrimitive(compiler::Node* context,
+                                        compiler::Node* input);
+
   enum ToIntegerTruncationMode {
     kNoTruncation,
     kTruncateMinusZero,
   };
 
   // Convert any object to an Integer.
   compiler::Node* ToInteger(compiler::Node* context, compiler::Node* input,
                             ToIntegerTruncationMode mode = kNoTruncation);
 
+  compiler::Node* NewConsString(compiler::Node* context, compiler::Node* length,
+                                compiler::Node* left, compiler::Node* right,
+                                AllocationFlags flags = kNone);
+
+  compiler::Node* StringAdd(compiler::Node* context, compiler::Node* left,
+                            compiler::Node* right,
+                            AllocationFlags flags = kNone);
+
   // Returns a node that contains a decoded (unsigned!) value of a bit
   // field |T| in |word32|. Returns result as an uint32 node.
   template <typename T>
   compiler::Node* BitFieldDecode(compiler::Node* word32) {
     return BitFieldDecode(word32, T::kShift, T::kMask);
   }
 
   // Returns a node that contains a decoded (unsigned!) value of a bit
   // field |T| in |word32|. Returns result as a word-size node.
   template <typename T>
@@ skipping 403 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_