re PR sanitizer/79897 (ICE in gimplify_modify_expr, at gimplify.c:5627 on ARM target)

	PR sanitizer/79897
	* ubsan.c (ubsan_encode_value): Call mark_addressable on the
	temporary.

	* c-c++-common/ubsan/pr79897.c: New test.

From-SVN: r245945

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2727acd..eb06b5a 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2017-03-07  Jakub Jelinek  <jakub@redhat.com>
+
+       PR sanitizer/79897
+       * ubsan.c (ubsan_encode_value): Call mark_addressable on the
+       temporary.
+
 2017-03-06  Jakub Jelinek  <jakub@redhat.com>
 
        PR c++/79821

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 2f27e4b..9c8b87e 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-03-07  Jakub Jelinek  <jakub@redhat.com>
+
+       PR sanitizer/79897
+       * c-c++-common/ubsan/pr79897.c: New test.
+
 2017-03-06  Vladimir Makarov  <vmakarov@redhat.com>
 
        PR rtl-optimization/79571

diff --git a/gcc/testsuite/c-c++-common/ubsan/pr79897.c b/gcc/testsuite/c-c++-common/ubsan/pr79897.c
new file mode 100644 (file)
index 0000000..0dadcff
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/ubsan/pr79897.c
@@ -0,0 +1,15 @@
+/* PR sanitizer/79897 */
+/* { dg-do compile } */
+/* { dg-options "-fsanitize=enum -O2" } */
+
+enum E
+{
+  A = 0,
+  B = ~0U + 1LL
+} x = A;
+
+int
+main ()
+{
+  return x != A;
+}

diff --git a/gcc/ubsan.c b/gcc/ubsan.c
index 11a41e1..17965ef 100644 (file)
--- a/gcc/ubsan.c
+++ b/gcc/ubsan.c
@@ -145,6 +145,7 @@ ubsan_encode_value (tree t, bool in_expand_p)
             code by making vars unnecessarily addressable.  */
          tree var = create_tmp_var (type);
          tree tem = build2 (MODIFY_EXPR, void_type_node, var, t);
+         mark_addressable (var);
          if (in_expand_p)
            {
              rtx mem