Increase number of available major keys.

This also adds a static assert checking that we do not
exceed the available number of major keys. The safepoint
table offset is now max 2^24 instead of 2^25.

R=hpayer@chromium.org

Review URL: https://codereview.chromium.org/110183003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18284 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/code-stubs.h

@@ -245,6 +245,7 @@ class CodeStub BASE_EMBEDDED {
            MajorKeyBits::encode(MajorKey());
   }
 
+  STATIC_ASSERT(NUMBER_OF_IDS < (1 << kStubMajorKeyBits));
   class MajorKeyBits: public BitField<uint32_t, 0, kStubMajorKeyBits> {};
   class MinorKeyBits: public BitField<uint32_t,
       kStubMajorKeyBits, kStubMinorKeyBits> {};  // NOLINT

src/objects.h

@@ -311,7 +311,7 @@ static const ExtraICState kNoExtraICState = 0;
 // Instance size sentinel for objects of variable size.
 const int kVariableSizeSentinel = 0;
 
-const int kStubMajorKeyBits = 6;
+const int kStubMajorKeyBits = 7;
 const int kStubMinorKeyBits = kBitsPerInt - kSmiTagSize - kStubMajorKeyBits;
 
 // All Maps have a field instance_type containing a InstanceType.
@@ -5484,7 +5484,7 @@ class Code: public HeapObject {
   static const int kStubMajorKeyFirstBit = kIsCrankshaftedBit + 1;
   static const int kSafepointTableOffsetFirstBit =
       kStubMajorKeyFirstBit + kStubMajorKeyBits;
-  static const int kSafepointTableOffsetBitCount = 25;
+  static const int kSafepointTableOffsetBitCount = 24;
 
   STATIC_ASSERT(kStubMajorKeyFirstBit + kStubMajorKeyBits <= 32);
   STATIC_ASSERT(kSafepointTableOffsetFirstBit +