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Re: ifcvt/crossjump patch: Fix PR 42496, 21803
On 07/24/2010 12:05 AM, Eric Botcazou wrote:
>> Before you do that, here's a new version. This corrects a few errors in
>> the register lifetime handling, and adds support for moving across two
>> basic blocks, which is very useful for switch statements but happens in
>> other cases as well.
> This implementation really moves insns whereas cross-jumping, the reversed
> transformation, is implemented by means of operations on the CFG. Although
> this is probably not as straightforward in this direction, did you consider
> the CFG approach instead? Wouldn't it simplify a little the integration in
> the cfgcleanup.c framework?
Please be more specific about what you envision.