A64: Fix int32 use in Lithium string functions

src/a64/lithium-codegen-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5143 matching lines @@
     virtual LInstruction* instr() { return instr_; }
    private:
     LStringCharCodeAt* instr_;
   };
 
   DeferredStringCharCodeAt* deferred =
       new(zone()) DeferredStringCharCodeAt(this, instr);
 
   StringCharLoadGenerator::Generate(masm(),
                                     ToRegister(instr->string()),
-                                    ToRegister(instr->index()),
+                                    ToRegister32(instr->index()),
                                     ToRegister(instr->result()),
                                     deferred->entry());
   __ Bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredStringCharCodeAt(LStringCharCodeAt* instr) {
   Register string = ToRegister(instr->string());
   Register result = ToRegister(instr->result());
 
@@ skipping 26 matching lines @@
     virtual void Generate() { codegen()->DoDeferredStringCharFromCode(instr_); }
     virtual LInstruction* instr() { return instr_; }
    private:
     LStringCharFromCode* instr_;
   };
 
   DeferredStringCharFromCode* deferred =
       new(zone()) DeferredStringCharFromCode(this, instr);
 
   ASSERT(instr->hydrogen()->value()->representation().IsInteger32());
-  Register char_code = ToRegister(instr->char_code());
+  Register char_code = ToRegister32(instr->char_code());
   Register result = ToRegister(instr->result());
 
-  __ Cmp(char_code, Operand(String::kMaxOneByteCharCode));
+  __ Cmp(char_code, String::kMaxOneByteCharCode);
   __ B(hi, deferred->entry());
   __ LoadRoot(result, Heap::kSingleCharacterStringCacheRootIndex);
-  __ Add(result, result, Operand(char_code, LSL, kPointerSizeLog2));
+  __ Add(result, result, Operand(char_code, SXTW, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result, FixedArray::kHeaderSize));
   __ CompareRoot(result, Heap::kUndefinedValueRootIndex);
   __ B(eq, deferred->entry());
   __ Bind(deferred->exit());
 }
 
 
 void LCodeGen::DoDeferredStringCharFromCode(LStringCharFromCode* instr) {
   Register char_code = ToRegister(instr->char_code());
   Register result = ToRegister(instr->result());
@@ skipping 462 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal