[PATCH][2/5] Handle simple latch bb in expand_omp_for_static_chunk

[Tom de Vries]

On 31/08/15 13:41, Tom de Vries wrote:
> On 15/04/15 15:10, Tom de Vries wrote:
>> Hi,
>>
>> This patch series fixes PR65637.
>>
>> Currently, ssa-handling code in expand_omp_for_static_chunk is dead and
>> not exercised by testing.
>>
>> Ssa-handling code in omp-low.c is only triggered by
>> pass_parallelize_loops, and that pass doesn't specify a chunk size on
>> the GIMPLE_OMP_FOR it constructs, so that only exercises the
>> expand_omp_for_static_nochunk path.
>>
>> Using the attached trigger patch, we excercise the ssa-handling code in
>> expand_omp_for_static_chunk.
>  >
>  > 1. Fix gcc_assert in expand_omp_for_static_chunk
>  > 2. Fix inner loop phi in expand_omp_for_static_chunk
>  > 3. Handle 2 preds for fin_bb in expand_omp_for_static_chunk
>
> I'm posting an updated series.
>
> 1. Add param parloops-chunk-size
> 2. Handle simple latch bb in expand_omp_for_static_chunk
> 3. Fix gcc_assert in expand_omp_for_static_chunk
> 4. Fix inner loop phi in expand_omp_for_static_chunk
> 5. Handle 2 preds for fin_bb in expand_omp_for_static_chunk
>
> There are two new patches, (1) and (2) in the new numbering.
>
> The first patch adds a param parloops-chunk-size, which means the
> ssa-handling code in expand_omp_for_static_chunk is no longer dead.
>
> The second patch handles simple latches in expand_omp_for_static_chunk,
> similar to the fix for PR66846 in expand_omp_for_static_nochunk.
>
> The rest of the patches are now updated to include the testcases (and
> patch number 4 has been updated to handle simple latches).
>
> The patch series has been bootstrapped and reg-tested on x86_64.
>
> I'll post the patches from the patch series individually. The first two
> in response to this email, the latter three in response to the earlier
> submissions.
>

Hi,

this patch handles simple latches in expand_omp_for_static_chunk, 
similar to how it's done for expand_omp_for_static_nochunk in the fix 
for PR66846 ( 
https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/omp-low.c?annotate=226427&pathrev=226427#l6539 
).

Thanks,
- Tom

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