On Wed, Nov 19, 2014 at 10:07:07AM +0100, Richard Biener wrote:
>
> The following improves code-generation for PR63844 by using
> a restrict qualified reference type for the OMP receiver decl.
> This improves alias analysis and points-to analysis enough to
> usually allow invariant and store motion where that was possible
> in the non-split-out variant.
>
> Bootstrapped and tested on x86_64-unknown-linux-gnu, ok for trunk?
>
> Sadly I don't have a good testcase (for example one that wasn't
> vectorized before but is now). We can add one later - ISTR there
> were a few other bugs about not vectorizing with -fopenmp, I'll
> try to find them again and see whether they are fixed.
Most of those PRs should have openmp keyword.
> 2014-11-19 Richard Biener <rguent...@suse.de>
>
> PR tree-optimization/63844
> * omp-low.c (fixup_child_record_type): Use a restrict qualified
> referece type for the receiver parameter.
Ok, thanks.
> --- gcc/omp-low.c (revision 217692)
> +++ gcc/omp-low.c (working copy)
> @@ -1517,7 +1517,8 @@ fixup_child_record_type (omp_context *ct
> layout_type (type);
> }
>
> - TREE_TYPE (ctx->receiver_decl) = build_pointer_type (type);
> + TREE_TYPE (ctx->receiver_decl)
> + = build_qualified_type (build_reference_type (type), TYPE_QUAL_RESTRICT);
> }
>
> /* Instantiate decls as necessary in CTX to satisfy the data sharing
Jakub
