[Bug lto/43857] -fresolution causes an ICE

["kargl at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from kargl at gcc dot gnu dot org  2010-04-22 21:08 -------
It in fact appears that -fresolution is not handled properly.

/home/sgk/work/4x/bin/gcc -flto -fresolution -o z h.o m.o
resolution_file_name = h.o

where I instrumented lto.c to see if resolution_file_name = -o

note h.o isn't in the expected format and triggers the ICE.

In lto.c, these lines should probably be changed to
a fatal_error.

troutmask:sgk[274] /home/sgk/work/4x/bin/gcc -flto -fresolution h.o m.o
lto1: fatal error: symbol resolution file h.o appears mangled
compilation terminated.


Index: lto/lto.c
===================================================================
--- lto/lto.c   (revision 158649)
+++ lto/lto.c   (working copy)
@@ -1794,7 +1794,9 @@ read_cgraph_and_symbols (unsigned nfiles
                     xstrerror (errno));

       t = fscanf (resolution, "%u", &num_objects);
-      gcc_assert (t == 1);
+      if (t != 1)
+       fatal_error ("symbol resolution file %s appears mangled",
+                    resolution_file_name);

       /* True, since the plugin splits the archives.  */
       gcc_assert (num_objects == nfiles);


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43857