[patch, fortran] PR 40628, front-end optimization pass

[Richard Henderson]

On 07/18/2010 09:11 PM, Jerry DeLisle wrote:
> On 07/18/2010 01:46 AM, Daniel Kraft wrote:
>> Hi Thomas,
>>
>> Thomas Koenig wrote:
>>> finally, here's the first attempt at a front-end optimization pass.
>>> Right now, it fixes PR 40626 and optimizes comparisons between variables
>>> (which only really is relevant for character comparisons). Many more
>>> things could (and should) be added over time.
>>
> 
> I like the idea as long as we do not duplicate middle-end work. If we
> can improve performance without sacrificing maintainability and
> correctness, I am all for it.  The idea of general passes is good. 
> Rather than optimize.c maybe call it early_pass.c or whatever.
> 
> Do any middle-end maintainers have an opinion on adding this optimization?

As long as the optimizations here are fortran-specific (e.g. high-level
matrix, string, or loop pre-expansion optimizations), I don't mind.


r~