mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-08 22:41:28 +08:00
79c12969ec
I've missed +FAIL: libgomp.c/loop-21.c execution test during testing of the recent patch. The problem is that while for the number of iterations computation it doesn't matter if we compute min_inner_iterations as (m2 * first + n2 + (adjusted step) + m1 * first + n1) / step or (m2 * last + n2 + (adjusted step) + m1 * last + n1) / step provided that in the second case we use as factor (m1 - m2) * ostep / step rather than (m2 - m1) * ostep / step, for the logical to actual iterator values computation it does matter and in my hand written C implementations of all the cases (outer vs. inner loop with increasing vs. decreasing iterator) I'm using the same computation and it worked well for all the pseudo-random iterators testing it was doing. It also means min_inner_iterations is misnamed, because it is not really minimum number of inner iterations, whether the first or last outer iteration results in the smaller or larger value of this can be (sometimes) only determined at runtime. So this patch also renames it to first_inner_iterations. 2020-07-15 Jakub Jelinek <jakub@redhat.com> PR libgomp/96198 * omp-general.h (struct omp_for_data): Rename min_inner_iterations member to first_inner_iterations, adjust comment. * omp-general.c (omp_extract_for_data): Adjust for the above change. Always use n1first and n2first to compute it, rather than depending on single_nonrect_cond_code. Similarly, always compute factor as (m2 - m1) * outer_step / inner_step rather than sometimes m1 - m2 depending on single_nonrect_cond_code. * omp-expand.c (expand_omp_for_init_vars): Rename min_inner_iterations to first_inner_iterations and min_inner_iterationsd to first_inner_iterationsd.
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.