Add support for Embedded Constant Pools for PPC and Arm

src/globals.h

 // Copyright 2012 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.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 56 matching lines @@
 #define USE_SIMULATOR 1
 #endif
 #if (V8_TARGET_ARCH_MIPS && !V8_HOST_ARCH_MIPS)
 #define USE_SIMULATOR 1
 #endif
 #if (V8_TARGET_ARCH_MIPS64 && !V8_HOST_ARCH_MIPS64)
 #define USE_SIMULATOR 1
 #endif
 #endif
 
-// Determine whether the architecture uses an out-of-line constant pool.
-#define V8_OOL_CONSTANT_POOL 0
+// Determine whether the architecture uses an embedded constant pool
+// (contiguous constant pool embedded in code object).
+#if V8_TARGET_ARCH_PPC
+#define V8_EMBEDDED_CONSTANT_POOL 1
+#else
+#define V8_EMBEDDED_CONSTANT_POOL 0
+#endif
 
 #ifdef V8_TARGET_ARCH_ARM
 // Set stack limit lower for ARM than for other architectures because
 // stack allocating MacroAssembler takes 120K bytes.
 // See issue crbug.com/405338
 #define V8_DEFAULT_STACK_SIZE_KB 864
 #else
 // Slightly less than 1MB, since Windows' default stack size for
 // the main execution thread is 1MB for both 32 and 64-bit.
 #define V8_DEFAULT_STACK_SIZE_KB 984
@@ skipping 414 matching lines @@
 // ParseRestriction is used to restrict the set of valid statements in a
 // unit of compilation.  Restriction violations cause a syntax error.
 enum ParseRestriction {
   NO_PARSE_RESTRICTION,         // All expressions are allowed.
   ONLY_SINGLE_FUNCTION_LITERAL  // Only a single FunctionLiteral expression.
 };
 
 // A CodeDesc describes a buffer holding instructions and relocation
 // information. The instructions start at the beginning of the buffer
 // and grow forward, the relocation information starts at the end of
-// the buffer and grows backward.
+// the buffer and grows backward.  A constant pool may exist at the
+// end of the instructions.
 //
-//  |<--------------- buffer_size ---------------->|
-//  |<-- instr_size -->|        |<-- reloc_size -->|
-//  +==================+========+==================+
-//  |   instructions   |  free  |    reloc info    |
-//  +==================+========+==================+
+//  |<--------------- buffer_size ----------------------------------->|
+//  |<------------- instr_size ---------->|        |<-- reloc_size -->|
+//  |               |<- const_pool_size ->|                           |
+//  +=====================================+========+==================+
+//  |  instructions |        data         |  free  |    reloc info    |
+//  +=====================================+========+==================+
 //  ^
 //  |
 //  buffer
 
 struct CodeDesc {
   byte* buffer;
   int buffer_size;
   int instr_size;
   int reloc_size;
+  int constant_pool_size;
   Assembler* origin;
 };
 
 
 // Callback function used for iterating objects in heap spaces,
 // for example, scanning heap objects.
 typedef int (*HeapObjectCallback)(HeapObject* obj);
 
 
 // Callback function used for checking constraints when copying/relocating
@@ skipping 423 matching lines @@
 inline FunctionKind WithObjectLiteralBit(FunctionKind kind) {
   kind = static_cast<FunctionKind>(kind | FunctionKind::kInObjectLiteral);
   DCHECK(IsValidFunctionKind(kind));
   return kind;
 }
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_