Cleanup useless parameter object_is_smi for NumberToStringStub::GenerateLookupNumberStringCache().

src/mips/code-stubs-mips.cc

 // Copyright 2012 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 1292 matching lines @@
   __ xori(v0, a0, 1 << Map::kIsUndetectable);
 }
 
 
 void NumberToStringStub::GenerateLookupNumberStringCache(MacroAssembler* masm,
                                                          Register object,
                                                          Register result,
                                                          Register scratch1,
                                                          Register scratch2,
                                                          Register scratch3,
-                                                         bool object_is_smi,
                                                          Label* not_found) {
   // Use of registers. Register result is used as a temporary.
   Register number_string_cache = result;
   Register mask = scratch3;
 
   // Load the number string cache.
   __ LoadRoot(number_string_cache, Heap::kNumberStringCacheRootIndex);
 
   // Make the hash mask from the length of the number string cache. It
   // contains two elements (number and string) for each cache entry.
   __ lw(mask, FieldMemOperand(number_string_cache, FixedArray::kLengthOffset));
   // Divide length by two (length is a smi).
   __ sra(mask, mask, kSmiTagSize + 1);
   __ Addu(mask, mask, -1);  // Make mask.
 
   // Calculate the entry in the number string cache. The hash value in the
   // number string cache for smis is just the smi value, and the hash for
   // doubles is the xor of the upper and lower words. See
   // Heap::GetNumberStringCache.
   Isolate* isolate = masm->isolate();
   Label is_smi;
   Label load_result_from_cache;
-  if (!object_is_smi) {
-    __ JumpIfSmi(object, &is_smi);
-    __ CheckMap(object,
-                scratch1,
-                Heap::kHeapNumberMapRootIndex,
-                not_found,
-                DONT_DO_SMI_CHECK);
+  __ JumpIfSmi(object, &is_smi);
+  __ CheckMap(object,
+              scratch1,
+              Heap::kHeapNumberMapRootIndex,
+              not_found,
+              DONT_DO_SMI_CHECK);
 
-    STATIC_ASSERT(8 == kDoubleSize);
-    __ Addu(scratch1,
-            object,
-            Operand(HeapNumber::kValueOffset - kHeapObjectTag));
-    __ lw(scratch2, MemOperand(scratch1, kPointerSize));
-    __ lw(scratch1, MemOperand(scratch1, 0));
-    __ Xor(scratch1, scratch1, Operand(scratch2));
-    __ And(scratch1, scratch1, Operand(mask));
+  STATIC_ASSERT(8 == kDoubleSize);
+  __ Addu(scratch1,
+          object,
+          Operand(HeapNumber::kValueOffset - kHeapObjectTag));
+  __ lw(scratch2, MemOperand(scratch1, kPointerSize));
+  __ lw(scratch1, MemOperand(scratch1, 0));
+  __ Xor(scratch1, scratch1, Operand(scratch2));
+  __ And(scratch1, scratch1, Operand(mask));
 
-    // Calculate address of entry in string cache: each entry consists
-    // of two pointer sized fields.
-    __ sll(scratch1, scratch1, kPointerSizeLog2 + 1);
-    __ Addu(scratch1, number_string_cache, scratch1);
+  // Calculate address of entry in string cache: each entry consists
+  // of two pointer sized fields.
+  __ sll(scratch1, scratch1, kPointerSizeLog2 + 1);
+  __ Addu(scratch1, number_string_cache, scratch1);
 
-    Register probe = mask;
-    __ lw(probe,
-           FieldMemOperand(scratch1, FixedArray::kHeaderSize));
-    __ JumpIfSmi(probe, not_found);
-    __ ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset));
-    __ ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset));
-    __ BranchF(&load_result_from_cache, NULL, eq, f12, f14);
-    __ Branch(not_found);
-  }
+  Register probe = mask;
+  __ lw(probe,
+          FieldMemOperand(scratch1, FixedArray::kHeaderSize));
+  __ JumpIfSmi(probe, not_found);
+  __ ldc1(f12, FieldMemOperand(object, HeapNumber::kValueOffset));
+  __ ldc1(f14, FieldMemOperand(probe, HeapNumber::kValueOffset));
+  __ BranchF(&load_result_from_cache, NULL, eq, f12, f14);
+  __ Branch(not_found);
 
   __ bind(&is_smi);
   Register scratch = scratch1;
   __ sra(scratch, object, 1);   // Shift away the tag.
   __ And(scratch, mask, Operand(scratch));
 
   // Calculate address of entry in string cache: each entry consists
   // of two pointer sized fields.
   __ sll(scratch, scratch, kPointerSizeLog2 + 1);
   __ Addu(scratch, number_string_cache, scratch);
 
   // Check if the entry is the smi we are looking for.
-  Register probe = mask;
   __ lw(probe, FieldMemOperand(scratch, FixedArray::kHeaderSize));
   __ Branch(not_found, ne, object, Operand(probe));
 
   // Get the result from the cache.
   __ bind(&load_result_from_cache);
   __ lw(result,
          FieldMemOperand(scratch, FixedArray::kHeaderSize + kPointerSize));
 
   __ IncrementCounter(isolate->counters()->number_to_string_native(),
                       1,
                       scratch1,
                       scratch2);
 }
 
 
 void NumberToStringStub::Generate(MacroAssembler* masm) {
   Label runtime;
 
   __ lw(a1, MemOperand(sp, 0));
 
   // Generate code to lookup number in the number string cache.
-  GenerateLookupNumberStringCache(masm, a1, v0, a2, a3, t0, false, &runtime);
+  GenerateLookupNumberStringCache(masm, a1, v0, a2, a3, t0, &runtime);
   __ DropAndRet(1);
 
   __ bind(&runtime);
   // Handle number to string in the runtime system if not found in the cache.
   __ TailCallRuntime(Runtime::kNumberToString, 1, 1);
 }
 
 
 static void ICCompareStub_CheckInputType(MacroAssembler* masm,
                                          Register input,
@@ skipping 4813 matching lines @@
   // Check the number to string cache.
   Label not_cached;
   __ bind(&not_string);
   // Puts the cached result into scratch1.
   NumberToStringStub::GenerateLookupNumberStringCache(masm,
                                                       arg,
                                                       scratch1,
                                                       scratch2,
                                                       scratch3,
                                                       scratch4,
-                                                      false,
                                                       &not_cached);
   __ mov(arg, scratch1);
   __ sw(arg, MemOperand(sp, stack_offset));
   __ jmp(&done);
 
   // Check if the argument is a safe string wrapper.
   __ bind(&not_cached);
   __ JumpIfSmi(arg, slow);
   __ GetObjectType(arg, scratch1, scratch2);  // map -> scratch1.
   __ Branch(slow, ne, scratch2, Operand(JS_VALUE_TYPE));
@@ skipping 1379 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS