add UNLIKELY / LIKELY util defines to help optimize iterators that are called a lot, only defined for gcc at the moment.

also some cmake formatting edits.

extern/CMakeLists.txt

@@ -45,7 +45,7 @@ if(WITH_BUILTIN_GLEW)
 endif()
 
 if(WITH_GAMEENGINE)
-   add_subdirectory(recastnavigation)
+	add_subdirectory(recastnavigation)
 endif()
 
 if(WITH_IMAGE_OPENJPEG AND (NOT UNIX OR APPLE))

intern/cycles/CMakeLists.txt

@@ -36,19 +36,19 @@ if(WITH_CYCLES_OPTIMIZED_KERNEL)
 endif()
 
 if(WITH_CYCLES_NETWORK)
-  add_definitions(-DWITH_NETWORK)
+	add_definitions(-DWITH_NETWORK)
 endif()
 
 if(WITH_CYCLES_OSL)
-  add_definitions(-DWITH_OSL)
+	add_definitions(-DWITH_OSL)
 endif()
 
 if(WITH_CYCLES_PARTIO)
-  add_definitions(-DWITH_PARTIO)
+	add_definitions(-DWITH_PARTIO)
 endif()
 
 if(WITH_CYCLES_CUDA_BINARIES)
-  add_definitions(-DWITH_CUDA_BINARIES)
+	add_definitions(-DWITH_CUDA_BINARIES)
 endif()
 
 add_definitions(-DWITH_OPENCL)

source/blender/blenlib/BLI_utildefines.h

@@ -300,4 +300,13 @@
 #  define BLI_assert(a) (void)0
 #endif
 
+/* hints for branch pradiction, only use in code that runs a _lot_ where */
+#ifdef __GNUC__
+#  define LIKELY(x)       __builtin_expect(!!(x), 1)
+#  define UNLIKELY(x)     __builtin_expect(!!(x), 0)
+#else
+#  define LIKELY(x)       (x)
+#  define UNLIKELY(x)     (x)
+#endif
+
 #endif // BLI_UTILDEFINES_H

source/blender/modifiers/CMakeLists.txt

@@ -40,7 +40,7 @@ set(INC
 
 set(INC_SYS
 	${ZLIB_INCLUDE_DIRS}
-        ${GLEW_INCLUDE_PATH}
+	${GLEW_INCLUDE_PATH}
 )
 
 set(SRC

source/blender/python/intern/CMakeLists.txt

@@ -33,7 +33,7 @@ set(INC
 	../../makesdna
 	../../makesrna
 	../../windowmanager
-    ../../gpu
+	../../gpu
 	../../../../intern/guardedalloc
 )