Add support for Embedded Constant Pools for PPC and Arm

src/globals.h

Index: src/globals.h
diff --git a/src/globals.h b/src/globals.h
index 218535cde3c4e2900fee1ad64e57a058bdf20198..f01c10044e9815d02c861075058e399b5a4356a7 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -74,8 +74,13 @@ namespace internal {
 #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
@@ -510,13 +515,15 @@ enum ParseRestriction {
 // 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
@@ -526,6 +533,7 @@ struct CodeDesc {
   int buffer_size;
   int instr_size;
   int reloc_size;
+  int constant_pool_size;
   Assembler* origin;
 };