[Bug rtl-optimization/54369] Delayed-branch pass in reorg.c removes too many instructions

[chaoyingfu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54369

--- Comment #3 from chaoyingfu at gcc dot gnu.org <chaoyingfu at gcc dot gnu.org> 2012-08-31 00:38:39 UTC ---
The fall-through path of this jump has a barrier (resulted from
__builtin_unreachable), and the target of this jump has a return instruction.

The algorithm in reorg.c may be more conservative to keep this jump for code
correctness.  Just another solution to this issue.  Thanks!