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always define HAVE_memory_barrier

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gcc/ChangeLog:

2015-05-23  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* defaults.h (gen_memory_barrier): New function.
	(HAVE_memory_barrier): Add default value.
	* optabs.c: Adjust.

From-SVN: r223621
This commit is contained in:
Trevor Saunders 2015-05-24 00:32:43 +00:00 committed by Trevor Saunders
parent fcb922a9c6
commit c76a461051
3 changed files with 16 additions and 5 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2015-05-23 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* defaults.h (gen_memory_barrier): New function.
(HAVE_memory_barrier): Add default value.
* optabs.c: Adjust.
2015-05-23 Trevor Saunders <tbsaunde+gcc@tbsaunde.org>
* defaults.h (gen_mem_thread_fence): New function.

10
gcc/defaults.h
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@ -1454,6 +1454,16 @@ gen_mem_thread_fence (rtx)
}
#endif
#ifndef HAVE_memory_barrier
#define HAVE_memory_barrier 0
static inline rtx
gen_memory_barrier ()
{
gcc_unreachable ();
return NULL;
}
#endif
#endif /* GCC_INSN_FLAGS_H */
#endif /* ! GCC_DEFAULTS_H */

5
gcc/optabs.c
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@ -7589,11 +7589,6 @@ expand_asm_memory_barrier (void)
/* This routine will either emit the mem_thread_fence pattern or issue a
sync_synchronize to generate a fence for memory model MEMMODEL. */
#ifndef HAVE_memory_barrier
# define HAVE_memory_barrier 0
# define gen_memory_barrier() (gcc_unreachable (), NULL_RTX)
#endif
void
expand_mem_thread_fence (enum memmodel model)
{