[PATCH] Fix PR59715

[Tom de Vries]

On 09-01-14 10:16, Richard Biener wrote:
>
> This fixes PR59715 by splitting critical edges again before
> code sinking.  The critical edge splitting done before PRE
> was designed to survive until sinking originally, but at least
> since 4.5 PRE now eventually cleans up the CFG and thus undos
> critical edge splitting.  This results in less than optimal
> code placement (and lost opportunities) for sinking and it
> breaks (at least) the virtual operand updating code which
> assumes that critical edges are still split.
>

Richard,

this follow-up patch:
- notes in pass_pre that PROP_no_crit_edge is destroyed
- notes in pass_sink_code that PROP_no_crit_edge is not required
   (because it's now ensured by the pass itself)

Build and reg-tested pr59715.c on x86_64.

OK for stage3 trunk if bootstrap and full reg-test on x86_64 is ok?

Thanks,
- Tom

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