Force WriteByte to be inlined

runtime/platform/globals.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef PLATFORM_GLOBALS_H_
 #define PLATFORM_GLOBALS_H_
 
 // __STDC_FORMAT_MACROS has to be defined before including <inttypes.h> to
 // enable platform independent printf format specifiers.
 #ifndef __STDC_FORMAT_MACROS
@@ skipping 106 matching lines @@
 #define kFpuRegisterSize 8
 typedef double fpu_register_t;
 // TODO(johnmccutchan): MIPS simd type.
 typedef struct {
   uint32_t data_[4];
 } simd_value_t;
 #else
 #error Architecture was not detected as supported by Dart.
 #endif
 
+// DART_FORCE_INLINE strongly hints to the compiler that a function should
+// be inlined. Your function is not guaranteed to be inlined but this is
+// stronger than just using "inline".
+// See: http://msdn.microsoft.com/en-us/library/z8y1yy88.aspx for an
+// explanation of some the cases when a function can never be inlined.
+#ifdef _MSC_VER
+#define DART_FORCE_INLINE __forceinline
+#elif __GNUC__
+#define DART_FORCE_INLINE inline __attribute__((always_inline))
+#else

[Søren Gjesse, 2013/02/27 12:57:44]

Wouldn't an empty define for DART_FORCE_INLINE work here - will work with any
other compiler that might become supported.

+#error Automatic compiler detection failed.
+#endif
+
 #if !defined(TARGET_ARCH_MIPS)
 #if !defined(TARGET_ARCH_ARM)
 #if !defined(TARGET_ARCH_X64)
 #if !defined(TARGET_ARCH_IA32)
 // No target architecture specified pick the one matching the host architecture.
 #if defined(HOST_ARCH_MIPS)
 #define TARGET_ARCH_MIPS 1
 #elif defined(HOST_ARCH_ARM)
 #define TARGET_ARCH_ARM 1
 #elif defined(HOST_ARCH_X64)
@@ skipping 283 matching lines @@
 // N.B.: As the GCC manual states, "[s]ince non-static C++ methods
 // have an implicit 'this' argument, the arguments of such methods
 // should be counted from two, not one."
 #define PRINTF_ATTRIBUTE(string_index, first_to_check) \
   __attribute__((__format__(__printf__, string_index, first_to_check)))
 #else
 #define PRINTF_ATTRIBUTE(string_index, first_to_check)
 #endif
 
 #endif  // PLATFORM_GLOBALS_H_