[ARM] PR target/71436: Restrict *load_multiple pattern till after LRA

	PR target/71436
	* config/arm/arm.md (*load_multiple): Add reload_completed to
	matching condition.

	* gcc.c-torture/compile/pr71436.c: New test.

From-SVN: r246419

gcc/ChangeLog

+2017-03-23  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	PR target/71436
+	* config/arm/arm.md (*load_multiple): Add reload_completed to
+	matching condition.
+
 2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
             Richard Biener  <rguenth@suse.com>
 

gcc/config/arm/arm.md

@@ -11832,12 +11832,15 @@
 
 ;; Patterns in ldmstm.md don't cover more than 4 registers. This pattern covers
 ;; large lists without explicit writeback generated for APCS_FRAME epilogue.
+;; The operands are validated through the load_multiple_operation
+;; match_parallel predicate rather than through constraints so enable it only
+;; after reload.
 (define_insn "*load_multiple"
   [(match_parallel 0 "load_multiple_operation"
     [(set (match_operand:SI 2 "s_register_operand" "=rk")
           (mem:SI (match_operand:SI 1 "s_register_operand" "rk")))
         ])]
-  "TARGET_32BIT"
+  "TARGET_32BIT && reload_completed"
   "*
   {
     arm_output_multireg_pop (operands, /*return_pc=*/false,

gcc/testsuite/ChangeLog

+2017-03-23  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	PR target/71436
+	* gcc.c-torture/compile/pr71436.c: New test.
+
 2017-03-23  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
             Richard Biener  <rguenther@suse.de>
 

gcc/testsuite/gcc.c-torture/compile/pr71436.c

+/* PR target/71436.  */
+
+#pragma pack(1)
+struct S0
+{
+  volatile int f0;
+  short f2;
+};
+
+void foo (struct S0 *);
+int a, d;
+static struct S0 b[5];
+static struct S0 c;
+void fn1 ();
+void
+main ()
+{
+  {
+    struct S0 e;
+    for (; d; fn1 ())
+      {
+        {
+          a = 3;
+          for (; a >= 0; a -= 1)
+            {
+              {
+                e = c;
+              }
+              b[a] = e;
+            }
+        }
+      }
+  }
+  foo (b);
+}