[Bug debug/33921] FAIL: gcc.dg/debug/debug-6.c -gdwarf-2 -O scan-assembler xyzzy

[drow at gcc dot gnu dot org]

------- Comment #4 from drow at gcc dot gnu dot org  2007-10-27 17:42 -------
Confirmed.  Here the &xyzzy and the call are in the same line.  That means that
previously the sequence got the right locator by accident, and the jump kept
the right locator.  Afterwards the sequence has the right locator and the jump
has none.

When reorder_blocks reconstructs block nesting from notes, it does not attach
the subblock.  That's because a NOTE_INSN_BLOCK_BEG is missing.

reemit_insn_block_notes:

      /* For sequences compute scope resulting from merging all scopes
         of instructions nested inside.  */

It ignores the locator on the sequence itself and selects one based on the
block inside.

I'm not sure that code makes any sense.  Anyway, the easiest fix is to leave
the locator on the jump alone.


-- 

drow at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |drow at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2007-10-27 17:42:51
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33921