mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-03-23 00:51:19 +08:00
07c48b61a0
-mlongcall -mno-pltseq is supposed to emit long calls by using indirect calls. It differs from -mlongcall -mpltseq in that the function addresses are not placed in the PLT and thus lazy PLT resolution is not available, affecting programs that dlopen shared libraries. In the case of -mcpu=future -mpcrel -mlongcall -mno-pltseq we see an indirect call being generated, but combine merrily optimises the sequence back to a direct call. call_indirect_pcrel is enough like call_nonlocal_aix that this can happen. This patch puts the call cookie back in the call rtl, removed by git commit f90f960ca8, in order to disable the optimisation for long calls. When that is done for call_local_aix the pattern becomes the same as call_local32/64, so I merged them. The only difference besides mode between call_local32 and call_local64, dating back to 1998 commit a260abc996, is that call_local64 has TARGET_64BIT in the predicate. That alone doesn't seem reason enough to need separate patterns; The P mode iterator selects DI on TARGET_64BIT anyway. * config/rs6000/rs6000.c (rs6000_call_aix): Emit cookie to pattern. (rs6000_indirect_call_template_1): Adjust to suit. * config/rs6000/rs6000.md (call_local): Merge call_local32, call_local64, and call_local_aix. (call_value_local): Simlarly. (call_nonlocal_aix, call_value_nonlocal_aix): Adjust rtl to suit, and disable pattern when CALL_LONG. (call_indirect_aix, call_value_indirect_aix): Adjust rtl. (call_indirect_elfv2, call_indirect_pcrel): Likewise. (call_value_indirect_elfv2, call_value_indirect_pcrel): Likewise.
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.