re PR tree-optimization/71872 (ICE in inchash::add_expr, at tree.c:7782 -…

re PR tree-optimization/71872 (ICE in inchash::add_expr, at tree.c:7782 - OEP_ADDRESS_OF asserted for ADDR_EXPR applied to constant)

	PR tree-optimization/71872
	* tree-data-ref.c (get_references_in_stmt): Ignore references
	with is_gimple_constant get_base_address.

	* gcc.c-torture/compile/pr71872.c: New test.

From-SVN: r238351

gcc/ChangeLog

+2016-07-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/71872
+	* tree-data-ref.c (get_references_in_stmt): Ignore references
+	with is_gimple_constant get_base_address.
+
 2016-07-14  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* config/arm/arm.h (TARGET_HAVE_LDACQ): Enable for ARMv8-M Mainline.

gcc/testsuite/ChangeLog

+2016-07-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/71872
+	* gcc.c-torture/compile/pr71872.c: New test.
+
 2016-07-14  Thomas Preud'homme  <thomas.preudhomme@arm.com>
 
 	* gcc.target/arm/atomic-comp-swap-release-acquire.c: Rename into ...

gcc/testsuite/gcc.c-torture/compile/pr71872.c

+/* PR tree-optimization/71872 */
+
+struct __attribute__((may_alias)) S { int a; };
+
+void
+foo (int *x, struct S *y)
+{
+  int i;
+  for (i = 0; i < 16; i++)
+    {
+      int a = 0;
+      if (*x)
+        *(struct S *) y = *(struct S *) &a;
+    }
+}

gcc/tree-data-ref.c

@@ -3868,7 +3868,8 @@ get_references_in_stmt (gimple *stmt, vec<data_ref_loc, va_heap> *references)
       if (DECL_P (op1)
 	  || (REFERENCE_CLASS_P (op1)
 	      && (base = get_base_address (op1))
-	      && TREE_CODE (base) != SSA_NAME))
+	      && TREE_CODE (base) != SSA_NAME
+	      && !is_gimple_min_invariant (base)))
 	{
 	  ref.ref = op1;
 	  ref.is_read = true;