mirror of
https://github.com/gcc-mirror/gcc.git
synced 2026-05-06 23:25:24 +02:00
ff98fa955b
If we include them in the ICF hash, they may cause congruence_groups to be processed in a different order due to different hashes, which in turn causes different funcdef_nos to be assigned to functions. Since these numbers are included in -fcompare-debug dumps, they cause failures. Since these options are not optimization options, in that they do not (or should not, save for bugs like this) affect the executable code output by the compiler, they should not be marked as such. This patch replaces the Optimization flag in the var-tracking options with the newly-introduced PerFunction flag, so that it can still be controlled on a per-function basis, but that disregards it in the hash computation used by ICF. This fixes -fcompare-debug failures in numerous LTO testcases. for gcc/ChangeLog * doc/options.texi (PerFunction): New. * opt-functions.awk (switch_flags): Map both Optimization and PerFunction to CL_OPTIMIZATION. * opth-gen.awk: Test for PerFunction flag along with Optimization. * optc-save-gen.awk: Likewise. Introduce var_opt_hash and set it only when the latter is present. Skip those that don't in the hash function generator. * common.opt (fvar-tracking): Mark as PerFunction instead of Optimization. (fvar-tracking-assignments): Likewise. (fvar-tracking-assignments-toggle): Likewise. (fvar-tracking-uninit): Likewise. From-SVN: r244198
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.