re PR middle-end/89284 (gcc -fsanitize=undefined inhibits -Wuninitialized)

	PR middle-end/89284
	* passes.def: Swap pass_ubsan and pass_early_warn_uninitialized.

	* gcc.dg/ubsan/pr89284.c: New test.

From-SVN: r268862

gcc/ChangeLog

+2019-02-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/89284
+	* passes.def: Swap pass_ubsan and pass_early_warn_uninitialized.
+
 2019-02-13  Ian Lance Taylor  <iant@golang.org>
 
 	* optc-save-gen.awk: Set var_opt_hash for initial optimizations

gcc/passes.def

@@ -56,8 +56,8 @@ along with GCC; see the file COPYING3.  If not see
       NEXT_PASS (pass_fixup_cfg);
       NEXT_PASS (pass_build_ssa);
       NEXT_PASS (pass_warn_nonnull_compare);
-      NEXT_PASS (pass_ubsan);
       NEXT_PASS (pass_early_warn_uninitialized);
+      NEXT_PASS (pass_ubsan);
       NEXT_PASS (pass_nothrow);
       NEXT_PASS (pass_rebuild_cgraph_edges);
   POP_INSERT_PASSES ()

gcc/testsuite/ChangeLog

+2019-02-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/89284
+	* gcc.dg/ubsan/pr89284.c: New test.
+
 2019-02-13  Ian Lance Taylor  <iant@golang.org>
 
 	* gcc.dg/func-attr-1.c: New test.

gcc/testsuite/gcc.dg/ubsan/pr89284.c

+/* PR middle-end/89284 */
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=undefined -O0 -Wuninitialized" } */
+
+struct A { _Bool a; int i; };
+
+int
+foo (void)
+{
+  struct A a;
+  if (a.i)	/* { dg-warning "'a.i' is used uninitialized in this function" } */
+    return 1;
+  return 0;
+}
+
+int
+bar (void)
+{
+  struct A a;
+  if (a.a)	/* { dg-warning "'a.a' is used uninitialized in this function" } */
+    return 1;
+  return 0;
+}