[AArch64] Add register constraints to add<mode>3_pluslong

gcc/

2015-12-04  James Greenhalgh  <james.greenhalgh@arm.com>

	* config/aarch64/aarch64.md (add<mode>3_pluslong): Add register
	constraints.

gcc/testsuite/

2015-12-04  James Greenhalgh  <james.greenhalgh@arm.com>

	* gcc.c-torture/compile/20151204.c: New.

From-SVN: r231304

gcc/ChangeLog

+2015-12-04  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* config/aarch64/aarch64.md (add<mode>3_pluslong): Add register
+	constraints.
+
 2015-12-04  Vladimir Makarov  <vmakarov@redhat.com>
 
 	PR rtl-optimization/68349

gcc/config/aarch64/aarch64.md

@@ -1615,9 +1615,9 @@
 
 (define_insn_and_split "*add<mode>3_pluslong"
   [(set
-    (match_operand:GPI 0 "register_operand" "")
-    (plus:GPI (match_operand:GPI 1 "register_operand" "")
-	      (match_operand:GPI 2 "aarch64_pluslong_operand" "")))]
+    (match_operand:GPI 0 "register_operand" "=r")
+    (plus:GPI (match_operand:GPI 1 "register_operand" "r")
+	      (match_operand:GPI 2 "aarch64_pluslong_immediate" "i")))]
   "!aarch64_plus_operand (operands[2], VOIDmode)
    && !aarch64_move_imm (INTVAL (operands[2]), <MODE>mode)"
   "#"

gcc/testsuite/ChangeLog

+2015-12-04  James Greenhalgh  <james.greenhalgh@arm.com>
+
+	* gcc.c-torture/compile/20151204.c: New.
+
 2015-12-04  Nathan Sidwell  <nathan@acm.org>
 
 	* gcc.dg/vla-24.c: Requires alloca.

gcc/testsuite/gcc.c-torture/compile/20151204.c

+typedef __SIZE_TYPE__ size_t;
+
+int strcmp (const char*, const char*);
+void *memchr (const void *, int, size_t);
+char* strncpy (char *, const char *, size_t);
+
+int
+main (int argc, char** argv)
+{
+  char target[32753] = "A";
+  char buffer[32753];
+  char *x;
+  x = buffer;
+
+  if (strcmp (target, "A")
+      || memchr (target, 'A', 0) != ((void *) 0))
+    if (strncpy (x, "", 4) != x);
+  return 0;
+}