On Tue, May 30, 2017 at 5:29 PM, Bin.Cheng <amker.ch...@gmail.com> wrote: > On Tue, May 30, 2017 at 12:27 PM, Richard Biener > <richard.guent...@gmail.com> wrote: >> On Thu, May 25, 2017 at 5:16 PM, Bin.Cheng <amker.ch...@gmail.com> wrote: >>> On Tue, May 23, 2017 at 5:23 PM, Bin Cheng <bin.ch...@arm.com> wrote: >>>> Hi, >>>> As commented in https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80815#c1, >>>> We can relax minimal segment length of DR_B for merging. With this change, >>>> the new test can be improved to only one alias check. Note the >>>> condition is still accurate after this patch, it won't introduce false >>>> alias. >>>> Bootstrap and test on x86_64 and AArch64, is it OK? >>> Updated patch wrto change of previous patch. >>> >>> Bootstrap and test on x86_64 and AArch64. >> >> Please omit unnecessary braces. Ok with that change. >> >> Note that >> >> if (tree_fits_uhwi_p (dr_b1->seg_len)) >> { >> min_seg_len_b = dr_b1->seg_len; >> if (tree_int_cst_sign_bit (dr_b1->seg_len)) >> min_seg_len_b = wi::neg (min_seg_len_b); >> >> the tree_fits_uhwi_p check is somewhat bogus now that min_seg_len_b is >> a wide-int. >> It should probably be changed to TREE_CODE (dr_b1->seg_len) == INTEGER_CST >> which also means that >> >> min_seg_len_b = wi::abs (dr_b1->seg_len); >> >> should work. > Thanks for reviewing. Here is updated patch. Bootstrap and test on > x86_64. Is it OK?
Ok. Richard. > Thanks, > bin >> >> Richard. >> >> >>> Thanks, >>> bin >>>> >>>> 2017-05-22 Bin Cheng <bin.ch...@arm.com> >>>> >>>> * tree-data-ref.c (prune_runtime_alias_test_list): Relax minimal >>>> segment length for dr_b. >>>> >>>> gcc/testsuite/ChangeLog >>>> 2017-05-22 Bin Cheng <bin.ch...@arm.com> >>>> >>>> * gcc.dg/vect/pr80815-3.c: New test.
