xtensa: Add RTX costs for if_then_else

It takes one machine instruction for both condtional branch and move.

gcc/ChangeLog:

	* config/xtensa/xtensa.cc (xtensa_rtx_costs):
	Add new case for IF_THEN_ELSE.

diff --git a/gcc/config/xtensa/xtensa.cc b/gcc/config/xtensa/xtensa.cc
index a851a7ae6b3cb5e08242346bb558710c8c3ea6fc..6ac879c38fb077593bd495f09f83d4f4582e5282 100644 (file)
--- a/gcc/config/xtensa/xtensa.cc
+++ b/gcc/config/xtensa/xtensa.cc
@@ -4273,6 +4273,7 @@ xtensa_rtx_costs (rtx x, machine_mode mode, int outer_code,
 
     case ZERO_EXTRACT:
     case ZERO_EXTEND:
+    case IF_THEN_ELSE:
       *total = COSTS_N_INSNS (1);
       return true;