Do not eagerly update allow_osr_at_loop_nesting_level.

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 "include/v8stdint.h"
 
 #include "src/base/build_config.h"
@@ skipping 150 matching lines @@
 #if V8_TARGET_ARCH_X64 && V8_TARGET_ARCH_32_BIT
 // x32 port also requires code range.
 const bool kRequiresCodeRange = true;
 const size_t kMaximalCodeRangeSize = 256 * MB;
 #else
 const bool kRequiresCodeRange = false;
 const size_t kMaximalCodeRangeSize = 0 * MB;
 #endif
 #endif
 
+STATIC_ASSERT(kPointerSize == (1 << kPointerSizeLog2));
+
 const int kBitsPerByte = 8;
 const int kBitsPerByteLog2 = 3;
 const int kBitsPerPointer = kPointerSize * kBitsPerByte;
 const int kBitsPerInt = kIntSize * kBitsPerByte;
 
 // IEEE 754 single precision floating point number bit layout.
 const uint32_t kBinary32SignMask = 0x80000000u;
 const uint32_t kBinary32ExponentMask = 0x7f800000u;
 const uint32_t kBinary32MantissaMask = 0x007fffffu;
 const int kBinary32ExponentBias = 127;
@@ skipping 584 matching lines @@
 enum MinusZeroMode {
   TREAT_MINUS_ZERO_AS_ZERO,
   FAIL_ON_MINUS_ZERO
 };
 
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_