rtl.h (emit): Add an optional boolean parameter to control whether barriers are emitted.

gcc/
	* rtl.h (emit): Add an optional boolean parameter to control
	whether barriers are emitted.
	* emit-rtl.c (emit): Likewise.
	* gensupport.c (get_emit_function): Return null rather than "emit".
	* genemit.c (gen_emit_seq): Handle the null return value.
	Don't emit barriers after the final instruction in the sequence.
	* gentarget-def.c (main): Don't emit barriers after the instruction.

From-SVN: r225000

1 files changed, 4 insertions, 2 deletions

diff --git a/gcc/gensupport.c b/gcc/gensupport.c
index 916fbc1..729366c 100644
--- a/gcc/gensupport.c
+++ b/gcc/gensupport.c
@@ -2983,7 +2983,9 @@ get_pattern_stats (struct pattern_stats *stats, rtvec pattern)
 				       stats->max_scratch_opno)) + 1;
 }
 
-/* Return the emit_* function that should be used for pattern X.  */
+/* Return the emit_* function that should be used for pattern X, or NULL
+   if we can't pick a particular type at compile time and should instead
+   fall back to "emit".  */
 
 const char *
 get_emit_function (rtx x)
@@ -3000,7 +3002,7 @@ get_emit_function (rtx x)
       return "emit_jump_insn";
 
     case UNKNOWN:
-      return "emit";
+      return NULL;
 
     default:
       gcc_unreachable ();