re PR tree-optimization/69483 (gcc ICE on x86_64-linux-gnu with "expected class 'type', have 'exceptional' (error_mark) in useless_type_conversion_p")

	PR tree-optimization/69483
	* gimple-fold.c (canonicalize_constructor_val): Return NULL
	if base has error_mark_node type.

	* c-parser.c (c_parser_translation_unit): Use FOR_EACH_VEC_ELT.

	* gcc.dg/pr69483.c: New test.
	* g++.dg/opt/pr69483.C: New test.

From-SVN: r232833

7 files changed, 39 insertions, 9 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a8f68e7..37a3782 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/69483
+	* gimple-fold.c (canonicalize_constructor_val): Return NULL
+	if base has error_mark_node type.
+
 2016-01-26  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	PR target/68620
diff --git a/gcc/c/ChangeLog b/gcc/c/ChangeLog
index 5577518..7d6250e 100644
--- a/gcc/c/ChangeLog
+++ b/gcc/c/ChangeLog
@@ -1,3 +1,8 @@
+2016-01-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/69483
+	* c-parser.c (c_parser_translation_unit): Use FOR_EACH_VEC_ELT.
+
 2016-01-20  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>
 
 	PR c/24293
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index efac47b..eede3a7 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -1431,15 +1431,14 @@ c_parser_translation_unit (c_parser *parser)
       while (c_parser_next_token_is_not (parser, CPP_EOF));
     }
 
-  for (unsigned i = 0; i < incomplete_record_decls.length (); ++i)
-    {
-      tree decl = incomplete_record_decls[i];
-      if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node)
-	{
-	  error ("storage size of %q+D isn%'t known", decl);
-	  TREE_TYPE (decl) = error_mark_node;
-	}
-    }
+  unsigned int i;
+  tree decl;
+  FOR_EACH_VEC_ELT (incomplete_record_decls, i, decl)
+    if (DECL_SIZE (decl) == NULL_TREE && TREE_TYPE (decl) != error_mark_node)
+      {
+	error ("storage size of %q+D isn%'t known", decl);
+	TREE_TYPE (decl) = error_mark_node;
+      }
 }
 
 /* Parse an external declaration (C90 6.7, C99 6.9).
diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c
index 70871cf..eb130d0 100644
--- a/gcc/gimple-fold.c
+++ b/gcc/gimple-fold.c
@@ -195,6 +195,8 @@ canonicalize_constructor_val (tree cval, tree from_decl)
 	   || TREE_CODE (base) == FUNCTION_DECL)
 	  && !can_refer_decl_in_current_unit_p (base, from_decl))
 	return NULL_TREE;
+      if (TREE_TYPE (base) == error_mark_node)
+	return NULL_TREE;
       if (TREE_CODE (base) == VAR_DECL)
 	TREE_ADDRESSABLE (base) = 1;
       else if (TREE_CODE (base) == FUNCTION_DECL)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 033faa3..3d0cc30 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2016-01-26  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/69483
+	* gcc.dg/pr69483.c: New test.
+	* g++.dg/opt/pr69483.C: New test.
+
 2016-01-26  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	PR target/68620
diff --git a/gcc/testsuite/g++.dg/opt/pr69483.C b/gcc/testsuite/g++.dg/opt/pr69483.C
new file mode 100644
index 0000000..866aba8
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/pr69483.C
@@ -0,0 +1,6 @@
+// PR tree-optimization/69483
+// { dg-do compile }
+
+struct T { struct S *a; };
+struct S b; // { dg-error "aggregate 'S b' has incomplete type and cannot be defined" }
+struct T c = { &b };
diff --git a/gcc/testsuite/gcc.dg/pr69483.c b/gcc/testsuite/gcc.dg/pr69483.c
new file mode 100644
index 0000000..2ab9dc3
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr69483.c
@@ -0,0 +1,6 @@
+/* PR tree-optimization/69483 */
+/* { dg-do compile } */
+
+struct T { struct S *a; };
+struct S b; /* { dg-error "storage size of 'b' isn't known" } */
+struct T c = { &b };