[incremental] Patch: FYI: handle structure assignment

[Tom Tromey <tromey at redhat dot com>]

I'm checking this in on the incremental-compiler branch.

I added an assert to c_parser_translation_unit to verify that the
guess from c_parser_find_decl_boundary is correct.  This found an
error in the heuristic; it failed for structure assignment.

Tom

Index: ChangeLog
from  Tom Tromey  <tromey@redhat.com>

	* c-parser.c (c_parser_bind_callback): Use GGC_CNEW.
	(c_parser_translation_unit): Added assert.

Index: c-parser.c
===================================================================
--- c-parser.c	(revision 127773)
+++ c-parser.c	(working copy)
@@ -494,12 +494,15 @@
 
 	  /* If we see a top-level open brace, it might be a function
 	     definition, but it might be something like 'union {x}' or
-	     'union name {x}'.  Here we differentiate the cases.  If
-	     we see what think is a function definition, then we know
-	     we are finished when we see the closing brace.  */
+	     'union name {x}'.  We might also see a structure
+	     initialization like 'char *z[] = { ... }'.  Here we
+	     differentiate the cases.  If we see what think is a
+	     function definition, then we know we are finished when we
+	     see the closing brace.  */
 	  if (brace_depth == 0
 	      && ! ((result > parser->next_token
-		     && TOKEN_IS_SEU (token[-1]))
+		     && (TOKEN_IS_SEU (token[-1])
+			 || token[-1].type == CPP_EQ))
 		    || (result - 1 > parser->next_token
 			&& TOKEN_IS_SEU (token[-2]))))
 	    {
@@ -645,10 +648,8 @@
 		    INSERT);
   if (!*slot)
     {
-      *slot = GGC_NEW (struct hunk_binding_entry);
+      *slot = GGC_CNEW (struct hunk_binding_entry);
       (*slot)->name = name;
-      (*slot)->x1 = NULL_TREE;
-      (*slot)->x2 = NULL_TREE;
     }
 
   if (TREE_CODE_CLASS (TREE_CODE (decl)) == tcc_declaration)
@@ -1799,6 +1800,7 @@
 		      c_parser_external_declaration (parser);
 		      finish_current_hunk (parser, &isolani, &isolani);
 		      gcc_assert (parsed_any == false);
+		      gcc_assert (parser->next_token == isolani.next_token + 1);
 		    }
 		  continue;
 		}