[pr 69666] No SRA default_def replacements for unscalarizable regions

2016-02-23  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/69666
	* tree-sra.c (sra_modify_assign): Do not attempt to create
	default_def replacements for unscalarizable regions.

testsuite/
	* gcc.dg/tree-ssa/pr69666.c: New test.

From-SVN: r233626

gcc/ChangeLog

+2016-02-23  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/69666
+	* tree-sra.c (sra_modify_assign): Do not attempt to create
+	default_def replacements for unscalarizable regions.
+
 2016-02-20  Mark Wielaard  <mjw@redhat.com>
 
 	PR c/28901

gcc/testsuite/ChangeLog

+2016-02-23  Martin Jambor  <mjambor@suse.cz>
+
+	PR tree-optimization/69666
+	* gcc.dg/tree-ssa/pr69666.c: New test.
+
 2016-02-23  Andre Vehreschild  <vehre@gcc.gnu.org>
 
 	PR fortran/67451

gcc/testsuite/gcc.dg/tree-ssa/pr69666.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -w" } */
+
+int a, c, d;
+float b;
+void *memcpy();
+int fun1(int p1, unsigned char *p2) {
+  p2[p1] = b;
+  return a;
+}
+void fun2() {
+  unsigned char e[16];
+  fun1(16, e);
+  d = e[d];
+  memcpy(&c, e, sizeof(e));
+}

gcc/tree-sra.c

@@ -3339,6 +3339,7 @@ sra_modify_assign (gimple *stmt, gimple_stmt_iterator *gsi)
     }
   else if (racc
 	   && !racc->grp_unscalarized_data
+	   && !racc->grp_unscalarizable_region
 	   && TREE_CODE (lhs) == SSA_NAME
 	   && !access_has_replacements_p (racc))
     {