[builtins] Remove STRING_ADD_LEFT and STRING_ADD_RIGHT builtins.

src/full-codegen/ppc/full-codegen-ppc.cc

Index: src/full-codegen/ppc/full-codegen-ppc.cc
diff --git a/src/full-codegen/ppc/full-codegen-ppc.cc b/src/full-codegen/ppc/full-codegen-ppc.cc
index 10fdc2435bab9e199057a2282ea5140e8c280e36..81db6b32fbaa011008f338a0b00f5b1728934416 100644
--- a/src/full-codegen/ppc/full-codegen-ppc.cc
+++ b/src/full-codegen/ppc/full-codegen-ppc.cc
@@ -3316,97 +3316,6 @@ void FullCodeGenerator::EmitIsSimdValue(CallRuntime* expr) {
 }
 
 
-void FullCodeGenerator::EmitIsStringWrapperSafeForDefaultValueOf(
-    CallRuntime* expr) {
-  ZoneList<Expression*>* args = expr->arguments();
-  DCHECK(args->length() == 1);
-
-  VisitForAccumulatorValue(args->at(0));
-
-  Label materialize_true, materialize_false, skip_lookup;
-  Label* if_true = NULL;
-  Label* if_false = NULL;
-  Label* fall_through = NULL;
-  context()->PrepareTest(&materialize_true, &materialize_false, &if_true,
-                         &if_false, &fall_through);
-
-  __ AssertNotSmi(r3);
-
-  __ LoadP(r4, FieldMemOperand(r3, HeapObject::kMapOffset));
-  __ lbz(ip, FieldMemOperand(r4, Map::kBitField2Offset));
-  __ andi(r0, ip, Operand(1 << Map::kStringWrapperSafeForDefaultValueOf));
-  __ bne(&skip_lookup, cr0);
-
-  // Check for fast case object. Generate false result for slow case object.
-  __ LoadP(r5, FieldMemOperand(r3, JSObject::kPropertiesOffset));
-  __ LoadP(r5, FieldMemOperand(r5, HeapObject::kMapOffset));
-  __ LoadRoot(ip, Heap::kHashTableMapRootIndex);
-  __ cmp(r5, ip);
-  __ beq(if_false);
-
-  // Look for valueOf name in the descriptor array, and indicate false if
-  // found. Since we omit an enumeration index check, if it is added via a
-  // transition that shares its descriptor array, this is a false positive.
-  Label entry, loop, done;
-
-  // Skip loop if no descriptors are valid.
-  __ NumberOfOwnDescriptors(r6, r4);
-  __ cmpi(r6, Operand::Zero());
-  __ beq(&done);
-
-  __ LoadInstanceDescriptors(r4, r7);
-  // r7: descriptor array.
-  // r6: valid entries in the descriptor array.
-  __ mov(ip, Operand(DescriptorArray::kDescriptorSize));
-  __ Mul(r6, r6, ip);
-  // Calculate location of the first key name.
-  __ addi(r7, r7, Operand(DescriptorArray::kFirstOffset - kHeapObjectTag));
-  // Calculate the end of the descriptor array.
-  __ mr(r5, r7);
-  __ ShiftLeftImm(ip, r6, Operand(kPointerSizeLog2));
-  __ add(r5, r5, ip);
-
-  // Loop through all the keys in the descriptor array. If one of these is the
-  // string "valueOf" the result is false.
-  // The use of ip to store the valueOf string assumes that it is not otherwise
-  // used in the loop below.
-  __ LoadRoot(ip, Heap::kvalueOf_stringRootIndex);
-  __ b(&entry);
-  __ bind(&loop);
-  __ LoadP(r6, MemOperand(r7, 0));
-  __ cmp(r6, ip);
-  __ beq(if_false);
-  __ addi(r7, r7, Operand(DescriptorArray::kDescriptorSize * kPointerSize));
-  __ bind(&entry);
-  __ cmp(r7, r5);
-  __ bne(&loop);
-
-  __ bind(&done);
-
-  // Set the bit in the map to indicate that there is no local valueOf field.
-  __ lbz(r5, FieldMemOperand(r4, Map::kBitField2Offset));
-  __ ori(r5, r5, Operand(1 << Map::kStringWrapperSafeForDefaultValueOf));
-  __ stb(r5, FieldMemOperand(r4, Map::kBitField2Offset));
-
-  __ bind(&skip_lookup);
-
-  // If a valueOf property is not found on the object check that its
-  // prototype is the un-modified String prototype. If not result is false.
-  __ LoadP(r5, FieldMemOperand(r4, Map::kPrototypeOffset));
-  __ JumpIfSmi(r5, if_false);
-  __ LoadP(r5, FieldMemOperand(r5, HeapObject::kMapOffset));
-  __ LoadP(r6, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
-  __ LoadP(r6, FieldMemOperand(r6, GlobalObject::kNativeContextOffset));
-  __ LoadP(r6,
-           ContextOperand(r6, Context::STRING_FUNCTION_PROTOTYPE_MAP_INDEX));
-  __ cmp(r5, r6);
-  PrepareForBailoutBeforeSplit(expr, true, if_true, if_false);
-  Split(eq, if_true, if_false, fall_through);
-
-  context()->Plug(if_true, if_false);
-}
-
-
 void FullCodeGenerator::EmitIsFunction(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK(args->length() == 1);