From: Jan Hubicka <hubicka@ucw.cz>
Date: Mon, 24 Dec 2018 11:21:25 +0000 (+0100)
Subject: tree.c (fld_simplified_type): Temporarily disable array simplification.
X-Git-Tag: basepoints/gcc-10~2102
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77e9f49535e298fb326cf0ebc208636d1dcf3f37;p=thirdparty%2Fgcc.git

tree.c (fld_simplified_type): Temporarily disable array simplification.


	* tree.c (fld_simplified_type): Temporarily disable array
	simplification.

	* gcc.c-torture/pr88140.c: New testcase.

From-SVN: r267398
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 77631ac9a21d..dce70c806348 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-12-24  Jan Hubicka  <hubicka@ucw.cz>
+	
+	PR lto/88140
+	* tree.c (fld_simplified_type): Temporarily disable array
+	simplification.
+
 2018-12-24  Jan Hubicka  <hubicka@ucw.cz>
 
 	* lto-symtab.c (lto_symtab_merge_decls_2): Do not report ODR violations
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 933b716b9f9a..6cd73cc97759 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-24  Jan Hubicka  <hubicka@ucw.cz>
+	
+	PR lto/88140
+	* gcc.c-torture/pr88140.c: New testcase.
+
 2018-12-24  Iain Sandoe  <iain@sandoe.co.uk>
 
 	PR testsuite/67974
diff --git a/gcc/testsuite/gcc.c-torture/pr88140.c b/gcc/testsuite/gcc.c-torture/pr88140.c
new file mode 100644
index 000000000000..a08c2cb89d8d
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/pr88140.c
@@ -0,0 +1,19 @@
+typedef struct {
+} a;
+
+typedef struct {
+  a *b[0];
+} c;
+
+void d() { ((c *)0)->b[0] = 0; }
+
+typedef struct {
+} a;
+
+typedef struct {
+  a *b[0];
+} c;
+
+void d() { ((c *)0)->b[0] = 0; }
+
+
diff --git a/gcc/tree.c b/gcc/tree.c
index c3d4bb8a00a2..5fd3be1e1f3d 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -5372,7 +5372,8 @@ fld_simplified_type (tree t, struct free_lang_data_d *fld)
     return t;
   if (POINTER_TYPE_P (t))
     return fld_incomplete_type_of (t, fld);
-  if (TREE_CODE (t) == ARRAY_TYPE)
+  /* FIXME: This triggers verification error, see PR88140.  */
+  if (TREE_CODE (t) == ARRAY_TYPE && 0)
     return fld_process_array_type (t, fld_simplified_type (TREE_TYPE (t), fld),
 				   fld_simplified_types, fld);
   return t;