[NDS32] Add 'trap' pattern for __builtin_trap ().

gcc/
	* config/nds32/nds32.md (trap): New pattern.

From-SVN: r268741

gcc/ChangeLog

 2019-02-10  Monk Chiang  <sh.chiang04@gmail.com>
 
+	* config/nds32/nds32.md (trap): New pattern.
+
+2019-02-10  Monk Chiang  <sh.chiang04@gmail.com>
+
 	* config/nds32/nds32.c (nds32_dwarf_register_span): Refine register
 	dwarf span.
 

gcc/config/nds32/nds32.md

@@ -2316,6 +2316,14 @@
 
 ;; ----------------------------------------------------------------------------
 
+;; Patterns for __builtin_trap.
+(define_insn "trap"
+  [(trap_if (const_int 1) (const_int 0))]
+  ""
+  "trap\t0")
+
+;; ----------------------------------------------------------------------------
+
 ;; Patterns for TLS.
 ;; The following two tls patterns don't be expanded directly because the
 ;; intermediate value may be spilled into the stack.  As a result, it is