[Bug lto/48467] [LTO/driver] Anomalous behavior of -save-temps

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48467

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.04.06 10:01:51
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-04-06 10:01:51 UTC ---
Confirmed.

What we could do is try to arrange for the WPA lto1 stage to receive
-o /dev/null, as it will not produce regular output.  Or to simply
avoid calling init_asm_output () for -fwpa.  So, sth like

Index: toplev.c
===================================================================
--- toplev.c    (revision 172023)
+++ toplev.c    (working copy)
@@ -1743,7 +1743,8 @@ lang_dependent_init (const char *name)
     return 0;
   input_location = save_loc;

-  init_asm_output (name);
+  if (!flag_wpa)
+    init_asm_output (name);

   /* If stack usage information is desired, open the output file.  */
   if (flag_stack_usage)
@@ -1848,8 +1849,6 @@ finalize (bool no_backend)
        fatal_error ("error writing to %s: %m", asm_file_name);
       if (fclose (asm_out_file) != 0)
        fatal_error ("error closing %s: %m", asm_file_name);
-      if (flag_wpa)
-       unlink_if_ordinary (asm_file_name);
     }

   if (stack_usage_file)


which likely needs fixups throughout the compiler in case of
missing asm_out_file checks.