More compact string representation on 64 bit.

runtime/vm/stub_code_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/assembler.h"
 #include "vm/compiler.h"
 #include "vm/dart_entry.h"
@@ skipping 701 matching lines @@
   __ bltz(T3, &slow_case);
 
   // Check for maximum allowed length.
   const intptr_t max_len =
       reinterpret_cast<int32_t>(Smi::New(Array::kMaxElements));
   __ BranchUnsignedGreater(T3, Immediate(max_len), &slow_case);
 
   const intptr_t cid = kArrayCid;
   NOT_IN_PRODUCT(__ MaybeTraceAllocation(kArrayCid, T4, &slow_case));
 
-  const intptr_t fixed_size = sizeof(RawArray) + kObjectAlignment - 1;
-  __ LoadImmediate(T2, fixed_size);
+  const intptr_t fixed_size_plus_alignment_padding =
+      sizeof(RawArray) + kObjectAlignment - 1;
+  __ LoadImmediate(T2, fixed_size_plus_alignment_padding);
   __ sll(T3, T3, 1);  // T3 is  a Smi.
   __ addu(T2, T2, T3);
   ASSERT(kSmiTagShift == 1);
   __ LoadImmediate(T3, ~(kObjectAlignment - 1));
   __ and_(T2, T2, T3);
 
   // T2: Allocation size.
 
   Heap::Space space = Heap::kNew;
   __ lw(T3, Address(THR, Thread::heap_offset()));
@@ skipping 240 matching lines @@
 // Input:
 //   T1: number of context variables.
 // Output:
 //   V0: new allocated RawContext object.
 void StubCode::GenerateAllocateContextStub(Assembler* assembler) {
   __ Comment("AllocateContext");
   if (FLAG_inline_alloc) {
     Label slow_case;
     // First compute the rounded instance size.
     // T1: number of context variables.
-    intptr_t fixed_size = sizeof(RawContext) + kObjectAlignment - 1;
-    __ LoadImmediate(T2, fixed_size);
+    intptr_t fixed_size_plus_alignment_padding =
+        sizeof(RawContext) + kObjectAlignment - 1;
+    __ LoadImmediate(T2, fixed_size_plus_alignment_padding);
     __ sll(T0, T1, 2);
     __ addu(T2, T2, T0);
     ASSERT(kSmiTagShift == 1);
     __ LoadImmediate(T0, ~((kObjectAlignment)-1));
     __ and_(T2, T2, T0);
 
     NOT_IN_PRODUCT(__ MaybeTraceAllocation(kContextCid, T4, &slow_case));
     // Now allocate the object.
     // T1: number of context variables.
     // T2: object size.
@@ skipping 1451 matching lines @@
 }
 
 
 void StubCode::GenerateAsynchronousGapMarkerStub(Assembler* assembler) {
   __ break_(0);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS