re PR target/87839 (ICE in final_scan_insn_1, at final.c:3070)

	PR target/87839
	* config/aarch64/atomics.md (@aarch64_compare_and_swap<mode>): Use
	rIJ constraint for aarch64_plus_operand rather than rn.

	* gcc.target/aarch64/pr87839.c: New test.

From-SVN: r266346

gcc/ChangeLog

+2018-11-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/87839
+	* config/aarch64/atomics.md (@aarch64_compare_and_swap<mode>): Use
+	rIJ constraint for aarch64_plus_operand rather than rn.
+
 2018-11-21  Renlin Li  <renlin.li@arm.com>
 
 	PR middle-end/84877

gcc/config/aarch64/atomics.md

@@ -71,7 +71,7 @@
     (match_operand:GPI 1 "aarch64_sync_memory_operand" "+Q"))   ;; memory
    (set (match_dup 1)
     (unspec_volatile:GPI
-      [(match_operand:GPI 2 "aarch64_plus_operand" "rn")	;; expect
+      [(match_operand:GPI 2 "aarch64_plus_operand" "rIJ")	;; expect
        (match_operand:GPI 3 "aarch64_reg_or_zero" "rZ")		;; desired
        (match_operand:SI 4 "const_int_operand")			;; is_weak
        (match_operand:SI 5 "const_int_operand")			;; mod_s

gcc/testsuite/ChangeLog

+2018-11-21  Jakub Jelinek  <jakub@redhat.com>
+
+	PR target/87839
+	* gcc.target/aarch64/pr87839.c: New test.
+
 2018-11-21  Renlin Li  <renlin.li@arm.com>
 
 	PR middle-end/84877

gcc/testsuite/gcc.target/aarch64/pr87839.c

+/* PR target/87839 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -w" } */
+
+long long b[64];
+void foo (void);
+int bar (void (*) (void));
+void qux (long long *, long long) __attribute__((noreturn));
+void quux (long long *, long long);
+
+void
+baz (void)
+{
+  __sync_val_compare_and_swap (b, 4294967298LL, 78187493520LL);
+  __sync_bool_compare_and_swap (b + 1, 8589934595LL, 21474836489LL);
+  __sync_fetch_and_xor (b, 60129542145LL);
+  quux (b, 42949672967LL);
+  __sync_xor_and_fetch (b + 22, 60129542145LL);
+  quux (b + 23, 42949672967LL);
+  if (bar (baz))
+    __builtin_abort ();
+  foo ();
+  __sync_val_compare_and_swap (b, 4294967298LL, 0);
+  __sync_bool_compare_and_swap (b + 1, 8589934595LL, 78187493520LL);
+  if (__sync_or_and_fetch (b, 21474836489LL) != 21474836489LL)
+    qux (b + 22, 60129542145LL);
+  __atomic_fetch_nand (b + 23, 42949672967LL, __ATOMIC_RELAXED);
+  bar (baz);
+}