[PR47036] sel-sched: don't attempt to move up unconditional jumps

[Vladimir Makarov]

On 12/22/2010 12:57 PM, Alexander Monakov wrote:
> Hi,
>
> This patch drops bits of support for moving up unconditional jumps.  The rest
> of the scheduler does not handle it anyway, and most of the time dependencies
> would prohibit such motion (in the testcase it's possible because other insns
> are nops).
>
> I've verified that the patch does not affect code generation on several cc1 .i
> files at -O3 (targeting ia64).  Bootstrapped on x86-64-linux, ia64-linux
> (testsuite running).  OK for trunk?
>
Ok.  Thanks for fixing the bug.

> 2010-12-22  Alexander Monakov<amonakov@ispras.ru>
>
> 	PR rtl-optimization/47036
> 	* sel-sched-ir.c (fallthru_bb_of_jump): Remove special support for
> 	unconditional jumps.
> 	* sel-sched.c (moveup_expr): Ditto.
>
> testsuite:
> 	* g++.dg/opt/pr47036.C: New.