mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-03 21:51:45 +08:00
6d44c88128
The following testcase fails with -fcompare-debug. The problem is that bar is marked as address_taken only with -g and not without. I've tracked it down to insert_init_stmt calling gimple_regimplify_operands even on DEBUG_STMTs. That function will just insert normal stmts before the DEBUG_STMT if the DEBUG_STMT operand isn't gimple val or invariant. While DCE will turn those statements into debug temporaries, it can cause differences in SSA_NAMEs and more importantly, the ipa references are generated from those before the DCE happens. On the testcase, the DEBUG_STMT value is (int)bar. We could generate DEBUG_STMTs with debug temporaries instead, but I fail to see the reason to do that, DEBUG_STMTs allow other expressions and all we want to ensure is that the expressions aren't too large (arbitrarily complex), but during inlining/function versioning I don't see why something would queue a DEBUG_STMT with arbitrarily complex expressions in there. 2020-03-16 Jakub Jelinek <jakub@redhat.com> PR debug/94167 * tree-inline.c (insert_init_stmt): Don't gimple_regimplify_operands DEBUG_STMTs. * gcc.dg/pr94167.c: New test.
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.