re PR c/59351 (ICE on empty compound literal with -pedantic)

	PR c/59351
c/
	* c-decl.c (build_compound_literal): Allow compound literals with
	empty initial value.
testsuite/
	* gcc.dg/pr59351.c: New test.

From-SVN: r205627

gcc/c/ChangeLog

+2013-12-03  Marek Polacek  <polacek@redhat.com>
+
+	PR c/59351
+	* c-decl.c (build_compound_literal): Allow compound literals with
+	empty initial value.
+
 2013-12-02  Joseph Myers  <joseph@codesourcery.com>
 
 	PR c/58235

gcc/c/c-decl.c

@@ -4693,7 +4693,9 @@ build_compound_literal (location_t loc, tree type, tree init, bool non_const)
     {
       int failure = complete_array_type (&TREE_TYPE (decl),
 					 DECL_INITIAL (decl), true);
-      gcc_assert (!failure);
+      /* If complete_array_type returns 3, it means that the
+         initial value of the compound literal is empty.  Allow it.  */
+      gcc_assert (failure == 0 || failure == 3);
 
       type = TREE_TYPE (decl);
       TREE_TYPE (DECL_INITIAL (decl)) = type;

gcc/testsuite/ChangeLog

+2013-12-03  Marek Polacek  <polacek@redhat.com>
+
+	PR c/59351
+	* gcc.dg/pr59351.c: New test.
+
 2013-12-03  Chung-Ju Wu  <jasonwucj@gmail.com>
 
 	* gcc.dg/20020312-2.c: Add __nds32__ case.

gcc/testsuite/gcc.dg/pr59351.c

+/* { dg-do compile } */
+/* { dg-options "-std=c99 -Wpedantic" } */
+
+unsigned int
+foo (void)
+{
+  return sizeof ((int[]) {}); /* { dg-warning "ISO C forbids empty initializer braces" } */
+}