re PR c/71858 (Surprising suggestions for misspellings)

	PR c/71858
	* c-decl.c (lookup_name_fuzzy): Ignore binding->invisible.

	* gcc.dg/spellcheck-identifiers.c (snprintf): Declare.
	* gcc.dg/spellcheck-identifiers-2.c: New test.
	* gcc.dg/diagnostic-token-ranges.c (nanl): Declare.
	* c-c++-common/attributes-1.c: Adjust dg-prune-output.

From-SVN: r238352

gcc/c/ChangeLog

+2016-07-14  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c/71858
+	* c-decl.c (lookup_name_fuzzy): Ignore binding->invisible.
+
 2016-07-12  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* c-parser.c (c_parser_generic_selection): Make type of variable

gcc/c/c-decl.c

@@ -4021,7 +4021,7 @@ lookup_name_fuzzy (tree name, enum lookup_name_fuzzy_kind kind)
   for (c_scope *scope = current_scope; scope; scope = scope->outer)
     for (c_binding *binding = scope->bindings; binding; binding = binding->prev)
       {
-	if (!binding->id)
+	if (!binding->id || binding->invisible)
 	  continue;
 	/* Don't use bindings from implicitly declared functions,
 	   as they were likely misspellings themselves.  */

gcc/testsuite/ChangeLog

 2016-07-14  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c/71858
+	* gcc.dg/spellcheck-identifiers.c (snprintf): Declare.
+	* gcc.dg/spellcheck-identifiers-2.c: New test.
+	* gcc.dg/diagnostic-token-ranges.c (nanl): Declare.
+	* c-c++-common/attributes-1.c: Adjust dg-prune-output.
+
+2016-07-14  Jakub Jelinek  <jakub@redhat.com>
+
 	PR tree-optimization/71872
 	* gcc.c-torture/compile/pr71872.c: New test.
 

gcc/testsuite/c-c++-common/attributes-1.c

 /* { dg-do compile } */
-/* { dg-prune-output "undeclared here \\(not in a function\\); did you mean .carg..|\[^\n\r\]* was not declared in this scope" } */
+/* { dg-prune-output "undeclared here \\(not in a function\\); did you mean .char..|\[^\n\r\]* was not declared in this scope" } */
 
 void* my_calloc(unsigned, unsigned) __attribute__((alloc_size(1,bar))); /* { dg-warning "outside range" } */
 void* my_realloc(void*, unsigned) __attribute__((alloc_size(bar))); /* { dg-warning "outside range" } */

gcc/testsuite/gcc.dg/diagnostic-token-ranges.c

@@ -2,6 +2,8 @@
 
 /* Verify that various diagnostics show source code ranges.  */
 
+long double nanl (const char *);
+
 /* These ones merely use token ranges; they don't use tree ranges.  */
 
 void undeclared_identifier (void)

gcc/testsuite/gcc.dg/spellcheck-identifiers-2.c

+/* PR c/71858 */
+/* Make sure anticipated builtins are not considered before they are declared.  */
+/* { dg-do compile } */
+/* { dg-options "-Wimplicit-function-declaration -fdiagnostics-show-caret" } */
+
+int sscafn (const char *, const char *, ...);
+
+int
+test_1 (const char *p)
+{
+  int i;
+  return ssacnf (p, "%d", &i); /* { dg-warning "10: implicit declaration of function .ssacnf.; did you mean .sscafn.?" } */
+  /* { dg-begin-multiline-output "" }
+   return ssacnf (p, "%d", &i);
+          ^~~~~~
+          sscafn
+   { dg-end-multiline-output "" } */
+}
+
+int scafn (const char *, ...);
+int scanf (const char *, ...);
+
+int
+test_2 (void)
+{
+  int i;
+  return sacnf ("%d", &i); /* { dg-warning "10: implicit declaration of function .sacnf.; did you mean .scanf.?" } */
+  /* { dg-begin-multiline-output "" }
+   return sacnf ("%d", &i);
+          ^~~~~
+          scanf
+   { dg-end-multiline-output "" } */
+}

gcc/testsuite/gcc.dg/spellcheck-identifiers.c

@@ -121,7 +121,7 @@ test_6 (enum foo f)
     }
 }
 
-/* Verify that we offer names of builtins as suggestions.  */
+int snprintf (char *, __SIZE_TYPE__, const char *, ...);
 
 void
 test_7 (int i, int j)