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author | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-07-29 18:02:47 +0000 |
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committer | zack <zack@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-07-29 18:02:47 +0000 |
commit | b70bd5426e751c76b70d8d569862671a10ecac13 (patch) | |
tree | 8880ef10951d3d1fbca761d1c3b95b762f0409e5 /gcc/dummy-conditions.c | |
parent | 22ac052b185623a692f9173da4e7d61070afeec0 (diff) | |
download | gcc-b70bd5426e751c76b70d8d569862671a10ecac13.tar.gz |
* gensupport.c: Include hashtab.h.
(insn_elision, condition_table, hash_c_test, cmp_c_test,
maybe_eval_c_test): New routines and data structures to
support insn elision.
(init_md_reader): Read and initialize the condition_table.
(read_md_rtx): Discard insn patterns whose C test is provably
always false.
* gensupport.h: Declare new functions and data structures.
* genconditions.c, dummy-conditions.c: New files.
* Makefile.in: Build genconditions; run it to construct
insn-conditions.c; build that and link it into most gen*
programs.
(HOST_SUPPORT, HOST_EARLY_SUPPORT): New variables.
(GEN): Delete, unused.
(STAGESTUFF): Update.
* gencodes.c: (gen_insn): #define CODE_FOR_xxx equal to
CODE_FOR_nothing for all elided patterns.
(main): Tweaked to support this.
* genflags.c (gen_proto): Emit a static inline generator
function here for all elided patterns, which simply returns
NULL_RTX.
(gen_insn): Do not define HAVE_xxx for elided patterns.
(main): Tweaked to support this. No need to forward-declare
struct rtx_def.
* genrecog.c: Do not bother emitting the C test if it's known
to be true at compile time.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@55839 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/dummy-conditions.c')
-rw-r--r-- | gcc/dummy-conditions.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/gcc/dummy-conditions.c b/gcc/dummy-conditions.c new file mode 100644 index 00000000000..157f86bd639 --- /dev/null +++ b/gcc/dummy-conditions.c @@ -0,0 +1,34 @@ +/* Support for calculating constant conditions. + Copyright (C) 2002 Free Software Foundation, Inc. + + This file is part of GNU CC. + + GNU CC is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + GNU CC is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with GNU CC; see the file COPYING. If not, write to + the Free Software Foundation, 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include "hconfig.h" +#include "system.h" +#include "gensupport.h" + +/* MD generators that are run before insn-conditions.c exists should + link against this file instead. Currently that is genconditions + and genconstants. */ + +/* Empty conditions table to prevent link errors. */ +const struct c_test insn_conditions[1] = { { 0, 0 } }; +const size_t n_insn_conditions = 0; + +/* Disable insn elision, since it is currently impossible. */ +const int insn_elision_unavailable = 1; |