final.c (compute_alignments): Do not apply loop alignment to a block falling through to the exit.

	* final.c (compute_alignments): Do not apply loop alignment to a block
	falling through to the exit.

From-SVN: r209451

gcc/ChangeLog

+2014-04-16  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* final.c (compute_alignments): Do not apply loop alignment to a block
+	falling through to the exit.
+
 2014-04-16  Catherine Moore  <clm@codesourcery.com>
 
 	* mips.md (*mov<mode>_internal, *movhi_internal, *movqi_internal):

gcc/final.c

@@ -775,6 +775,8 @@ compute_alignments (void)
       /* In case block is frequent and reached mostly by non-fallthru edge,
 	 align it.  It is most likely a first block of loop.  */
       if (has_fallthru
+	  && !(single_succ_p (bb)
+	       && single_succ (bb) == EXIT_BLOCK_PTR_FOR_FN (cfun))
 	  && optimize_bb_for_speed_p (bb)
 	  && branch_frequency + fallthru_frequency > freq_threshold
 	  && (branch_frequency