[stubs] Remove StringIndexOfChar

src/code-stub-assembler.cc

 // 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.
 #include "src/code-stub-assembler.h"
 #include "src/code-factory.h"
 #include "src/frames-inl.h"
 #include "src/frames.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 3714 matching lines @@
   Bind(&done_native);
   {
     IncrementCounter(counters->string_add_native(), 1);
     Goto(&done);
   }
 
   Bind(&done);
   return result.value();
 }
 
-Node* CodeStubAssembler::StringIndexOfChar(Node* context, Node* string,
-                                           Node* needle_char, Node* from) {
-  CSA_ASSERT(this, IsString(string));
-  Variable var_result(this, MachineRepresentation::kTagged);
-
-  Label out(this), runtime(this, Label::kDeferred);
-
-  // Let runtime handle non-one-byte {needle_char}.
-
-  Node* const one_byte_char_mask = Int32Constant(0xFF);
-  GotoUnless(
-      Word32Equal(Word32And(needle_char, one_byte_char_mask), needle_char),
-      &runtime);
-
-  // TODO(jgruber): Handle external and two-byte strings.
-
-  Node* const one_byte_seq_mask = Int32Constant(
-      kIsIndirectStringMask | kExternalStringTag | kStringEncodingMask);
-  Node* const expected_masked = Int32Constant(kOneByteStringTag);
-
-  Node* const string_instance_type = LoadInstanceType(string);
-  GotoUnless(Word32Equal(Word32And(string_instance_type, one_byte_seq_mask),
-                         expected_masked),
-             &runtime);
-
-  // If we reach this, {string} is a non-indirect, non-external one-byte string.
-
-  Node* const length = LoadStringLength(string);
-  Node* const search_range_length = SmiUntag(SmiSub(length, from));
-
-  const int offset = SeqOneByteString::kHeaderSize - kHeapObjectTag;
-  Node* const begin = IntPtrConstant(offset);
-  Node* const cursor = IntPtrAdd(begin, SmiUntag(from));
-  Node* const end = IntPtrAdd(cursor, search_range_length);
-
-  var_result.Bind(SmiConstant(Smi::FromInt(-1)));
-
-  BuildFastLoop(
-      cursor, end,
-      [this, string, needle_char, begin, &var_result, &out](Node* cursor) {
-        Label next(this);
-        Node* value = Load(MachineType::Uint8(), string, cursor);
-        GotoUnless(Word32Equal(value, needle_char), &next);
-
-        // Found a match.
-        Node* index = SmiTag(IntPtrSub(cursor, begin));
-        var_result.Bind(index);
-        Goto(&out);
-
-        Bind(&next);
-      },
-      1, INTPTR_PARAMETERS, IndexAdvanceMode::kPost);
-  Goto(&out);
-
-  Bind(&runtime);
-  {
-    Node* const pattern = StringFromCharCode(needle_char);
-    Node* const result =
-        CallRuntime(Runtime::kStringIndexOf, context, string, pattern, from);
-    var_result.Bind(result);
-    Goto(&out);
-  }
-
-  Bind(&out);
-  return var_result.value();
-}
-
 Node* CodeStubAssembler::StringFromCodePoint(Node* codepoint,
                                              UnicodeEncoding encoding) {
   Variable var_result(this, MachineRepresentation::kTagged,
                       EmptyStringConstant());
 
   Label if_isword16(this), if_isword32(this), return_result(this);
 
   Branch(Uint32LessThan(codepoint, Int32Constant(0x10000)), &if_isword16,
          &if_isword32);
 
@@ skipping 4597 matching lines @@
         formatted.c_str(), TENURED);
     CallRuntime(Runtime::kGlobalPrint, NoContextConstant(),
                 HeapConstant(string));
   }
   CallRuntime(Runtime::kDebugPrint, NoContextConstant(), tagged_value);
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8