[PATCH] PR 38156

[Razya Ladelsky <RAZYA at il dot ibm dot com>]

Hi,

Consider this loop:

for (i=0; i<N; i++)
     s *= i/2;

when distributing the iterations to multiple threads, the shared variables 

need registered in a shared struct.
For the case of the above loop, the only shared variable is the reduction 
var.
For such cases, where there are no shared variables except reduction, the 
struct 
was not created. This is fixed in the attached patch.

Another fix in this patch is explicitly NULLing the vect_dump global 
variable, 
because it is when vect_analyze_loop_form () is called from parloop pass.

Bootstrapped and regtested for C,C++, Fortran on i586
OK?

Thanks,
Razya

                * tree-parloops.c (loop_parallel_p): NULL vect_dump.
                (separate_decls_in_region): Create shared struct even when 
there 
                are only reductions.

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