Reland "Rename kIs64BitArch with kRequiresCodeRange."

src/spaces.cc

 // Copyright 2011 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/v8.h"
 
 #include "src/full-codegen.h"
 #include "src/macro-assembler.h"
 #include "src/mark-compact.h"
 #include "src/msan.h"
@@ skipping 97 matching lines @@
       free_list_(0),
       allocation_list_(0),
       current_allocation_block_index_(0) {
 }
 
 
 bool CodeRange::SetUp(size_t requested) {
   ASSERT(code_range_ == NULL);
 
   if (requested == 0) {
-    // On 64-bit platform(s), we put all code objects in a 512 MB range of
-    // virtual address space, so that they can call each other with near calls.
-    if (kIs64BitArch) {
-      requested = 512 * MB;
+    // When a target requires the code range feature, we put all code objects
+    // in a kMaximalCodeRangeSize range of virtual address space, so that
+    // they can call each other with near calls.
+    if (kRequiresCodeRange) {
+      requested = kMaximalCodeRangeSize;
     } else {
       return true;
     }
   }
 
+  ASSERT(!kRequiresCodeRange || requested <= kMaximalCodeRangeSize);
   code_range_ = new VirtualMemory(requested);
   CHECK(code_range_ != NULL);
   if (!code_range_->IsReserved()) {
     delete code_range_;
     code_range_ = NULL;
     return false;
   }
 
   // We are sure that we have mapped a block of requested addresses.
   ASSERT(code_range_->size() == requested);
@@ skipping 2976 matching lines @@
     object->ShortPrint();
     PrintF("\n");
   }
   printf(" --------------------------------------\n");
   printf(" Marked: %x, LiveCount: %x\n", mark_size, LiveBytes());
 }
 
 #endif  // DEBUG
 
 } }  // namespace v8::internal