[Bug testsuite/68643] FAIL: gcc.dg/tree-prof/cold_partition_label.c scan-assembler foo[._]+cold[._]+0

["dave.anglin at bell dot net" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68643

--- Comment #2 from dave.anglin at bell dot net ---
On 2015-12-02, at 5:22 AM, rguenth at gcc dot gnu.org wrote:

> so this is set wrongly for your target?  Or rather
> 
> # Return 1 if compilation with -freorder-blocks-and-partition is error-free
> # for trivial code, 0 otherwise.
> 
> proc check_effective_target_freorder {} {
>    return [check_no_compiler_messages freorder object {
>        void foo (void) { }
>    } "-freorder-blocks-and-partition"]
> }
> 
> is not working for some reason?

With gcc-6, foo compiles without error.  With gcc-5,

dave@mx3210:~/gnu/gcc/objdir$ gcc -freorder-blocks-and-partition -S -O2 xxx.c
xxx.c:1:0: note: -freorder-blocks-and-partition does not work on this
architecture
 void foo (void) { }
 ^

We have in pa.c (pa_option_override):

  /* Disable -freorder-blocks-and-partition as we don't support hot and
     cold partitioning.  */
  if (flag_reorder_blocks_and_partition)
    {
      inform (input_location,
              "-freorder-blocks-and-partition does not work "
              "on this architecture");
      flag_reorder_blocks_and_partition = 0;
      flag_reorder_blocks = 1;
    }

--
John David Anglin       dave.anglin@bell.net