re PR c++/89585 (GCC 8.3: asm volatile no longer accepted at file scope)

	PR c++/89585
	* doc/extend.texi (Basic Asm): Document qualifiers are not allowed
	at toplevel.

	* parser.c (cp_parser_asm_definition): Parse asm qualifiers even
	at toplevel, but diagnose them.

	* g++.dg/asm-qual-3.C: Adjust expected diagnostics.

From-SVN: r269451

gcc/ChangeLog

+2019-03-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/89585
+	* doc/extend.texi (Basic Asm): Document qualifiers are not allowed
+	at toplevel.
+
 2019-03-06  Peter Bergner  <bergner@linux.ibm.com>
 
 	PR rtl-optimization/88845

gcc/cp/ChangeLog

+2019-03-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/89585
+	* parser.c (cp_parser_asm_definition): Parse asm qualifiers even
+	at toplevel, but diagnose them.
+
 2019-03-06  Jason Merrill  <jason@redhat.com>
 
 	PR c++/89381 - implicit copy and using-declaration.

gcc/cp/parser.c

@@ -19766,8 +19766,9 @@ cp_parser_asm_definition (cp_parser* parser)
   location_t volatile_loc = UNKNOWN_LOCATION;
   location_t inline_loc = UNKNOWN_LOCATION;
   location_t goto_loc = UNKNOWN_LOCATION;
+  location_t first_loc = UNKNOWN_LOCATION;
 
-  if (cp_parser_allow_gnu_extensions_p (parser) && parser->in_function_body)
+  if (cp_parser_allow_gnu_extensions_p (parser))
     for (;;)
       {
 	cp_token *token = cp_lexer_peek_token (parser->lexer);
@@ -19782,6 +19783,8 @@ cp_parser_asm_definition (cp_parser* parser)
 	      }
 	    else
 	      volatile_loc = loc;
+	    if (!first_loc)
+	      first_loc = loc;
 	    cp_lexer_consume_token (parser->lexer);
 	    continue;
 
@@ -19793,6 +19796,8 @@ cp_parser_asm_definition (cp_parser* parser)
 	      }
 	    else
 	      inline_loc = loc;
+	    if (!first_loc)
+	      first_loc = loc;
 	    cp_lexer_consume_token (parser->lexer);
 	    continue;
 
@@ -19804,6 +19809,8 @@ cp_parser_asm_definition (cp_parser* parser)
 	      }
 	    else
 	      goto_loc = loc;
+	    if (!first_loc)
+	      first_loc = loc;
 	    cp_lexer_consume_token (parser->lexer);
 	    continue;
 
@@ -19823,6 +19830,12 @@ cp_parser_asm_definition (cp_parser* parser)
   bool inline_p = (inline_loc != UNKNOWN_LOCATION);
   bool goto_p = (goto_loc != UNKNOWN_LOCATION);
 
+  if (!parser->in_function_body && (volatile_p || inline_p || goto_p))
+    {
+      error_at (first_loc, "asm qualifier outside of function body");
+      volatile_p = inline_p = goto_p = false;
+    }
+
   /* Look for the opening `('.  */
   if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
     return;

gcc/doc/extend.texi

@@ -9064,6 +9064,8 @@ outside of C functions, you must use basic @code{asm}.
 You can use this technique to emit assembler directives,
 define assembly language macros that can be invoked elsewhere in the file,
 or write entire functions in assembly language.
+Basic @code{asm} statements outside of functions may not use any
+qualifiers.
 
 @item
 Functions declared

gcc/testsuite/ChangeLog

+2019-03-07  Jakub Jelinek  <jakub@redhat.com>
+
+	PR c++/89585
+	* g++.dg/asm-qual-3.C: Adjust expected diagnostics.
+
 2019-03-06  Harald Anlauf  <anlauf@gmx.de>
 
 	PR fortran/71203

gcc/testsuite/g++.dg/asm-qual-3.C

@@ -2,11 +2,11 @@
 // { dg-do compile }
 // { dg-options "-std=gnu++98" }
 
-asm const ("");    // { dg-error {expected '\(' before 'const'} }
-asm volatile (""); // { dg-error {expected '\(' before 'volatile'} }
+asm const ("");    // { dg-error {'const' is not an asm qualifier} }
+asm volatile (""); // { dg-error {asm qualifier outside of function body} }
 asm restrict (""); // { dg-error {expected '\(' before 'restrict'} }
-asm inline ("");   // { dg-error {expected '\(' before 'inline'} }
-asm goto ("");     // { dg-error {expected '\(' before 'goto'} }
+asm inline ("");   // { dg-error {asm qualifier outside of function body} }
+asm goto ("");     // { dg-error {asm qualifier outside of function body} }
 
 // There are many other things wrong with this code, so:
 // { dg-excess-errors "" }