combine: Don't generate IF_THEN_ELSE

On all targets I managed to test (21) this results in better code.  Only
alpha ends up with slightly bigger code.


	* combine.c (combine_simplify_rtx): Don't make IF_THEN_ELSE RTL.

From-SVN: r271047

gcc/ChangeLog

+2019-05-09  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	* combine.c (combine_simplify_rtx): Don't make IF_THEN_ELSE RTL.
+
 2019-05-09  Bill Schmidt  <wschmidt@linux.ibm.com>
 
 	* doc/loop.texi: Remove reference to FOR_EACH_LOOP_BREAK.

gcc/combine.c

@@ -5909,14 +5909,6 @@ combine_simplify_rtx (rtx x, machine_mode op0_mode, int in_dest,
 								 mode, VOIDmode,
 								 cond, cop1),
 					mode);
-	      else
-		return gen_rtx_IF_THEN_ELSE (mode,
-					     simplify_gen_relational (cond_code,
-								      mode,
-								      VOIDmode,
-								      cond,
-								      cop1),
-					     true_rtx, false_rtx);
 
 	      code = GET_CODE (x);
 	      op0_mode = VOIDmode;