genmodes.c: Add CONST_MODE_UNIT_SIZE modifier.

2015-09-01  David Sherwood  <david.sherwood@arm.com>

    gcc/
	* genmodes.c: Add CONST_MODE_UNIT_SIZE modifier.

From-SVN: r227369

gcc/ChangeLog

+2015-09-01  David Sherwood  <david.sherwood@arm.com>
+
+	* genmodes.c: Add CONST_MODE_UNIT_SIZE modifier.
+
 2015-09-01  Kyrylo Tkachov <kyrylo.tkachov@arm.com>
 
 	* ifcvt.c (struct noce_if_info): Add then_simple, else_simple,

gcc/genmodes.c

@@ -1063,7 +1063,8 @@ extern __inline__ __attribute__((__always_inline__, __gnu_inline__))\n\
 unsigned char\n\
 mode_unit_size_inline (machine_mode mode)\n\
 {\n\
-  extern unsigned char mode_unit_size[NUM_MACHINE_MODES];\n\
+  extern CONST_MODE_UNIT_SIZE unsigned char mode_unit_size[NUM_MACHINE_MODES];\
+\n\
   switch (mode)\n\
     {");