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| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-08-12 17:36:45 +0000 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gcc.gnu.org> | 2015-08-12 17:36:45 +0000 |
| commit | a024f5143d592db41c5316c24d3e10fd86c839ec (patch) | |
| tree | 07a3b7e9657deeab0b91ba1446c600d5ffbcfcf5 /gcc/tree-stdarg.c | |
| parent | 4757fa7f0ba01e207b313c2931312555d5ec98bf (diff) | |
| download | gcc-a024f5143d592db41c5316c24d3e10fd86c839ec.zip gcc-a024f5143d592db41c5316c24d3e10fd86c839ec.tar.gz gcc-a024f5143d592db41c5316c24d3e10fd86c839ec.tar.bz2 | |
xtensa: add -mauto-litpools option
With support from assembler this option allows compiling huge functions,
where single literal pool at the beginning of a function may not be
reachable by L32R instructions at its end.
Currently assembler --auto-litpools option cannot deal with literals
used from multiple locations separated by more than 256 KBytes of code.
Don't turn constants into literals, instead use MOVI instruction to load
them into registers and let the assembler turn them into literals as
necessary.
2015-08-12 Max Filippov <jcmvbkbc@gmail.com>
gcc/
* config/xtensa/constraints.md (define_constraint "Y"): New
constraint.
* config/xtensa/elf.h (ASM_SPEC): Add m(no-)auto-litpools.
* config/xtensa/linux.h (ASM_SPEC): Likewise.
* config/xtensa/predicates.md (move_operand): Match constants
and symbols in the presence of TARGET_AUTO_LITPOOLS.
* config/xtensa/xtensa.c (xtensa_valid_move): Don't allow
immediate references to TLS data.
(xtensa_emit_move_sequence): Don't force constants to memory in
the presence of TARGET_AUTO_LITPOOLS.
(print_operand): Add 'y' format, same as default, but capable of
printing SF mode constants as well.
* config/xtensa/xtensa.md (movsi_internal, movhi_internal)
(movsf_internal): Add movi pattern that loads literal.
(movsf, movdf): Don't force constants to memory in the presence
of TARGET_AUTO_LITPOOLS.
(movdf_internal): Add 'Y' constraint.
* config/xtensa/xtensa.opt (mauto-litpools): New option.
* doc/invoke.text (Xtensa options): Document -mauto-litpools.
From-SVN: r226828
Diffstat (limited to 'gcc/tree-stdarg.c')
0 files changed, 0 insertions, 0 deletions