/* Process machine description and calculate constant conditions.
- Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007
+ Free Software Foundation, Inc.
This file is part of GCC.
GCC 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)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with GCC; see the file COPYING. If not, write to
- the Free Software Foundation, 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with GCC; see the file COPYING3. If not see
+ <http://www.gnu.org/licenses/>. */
/* In a machine description, all of the insn patterns - define_insn,
define_expand, define_split, define_peephole, define_peephole2 -
#include "hashtab.h"
#include "gensupport.h"
-/* so we can include except.h in the generated file */
+/* so we can include except.h in the generated file. */
static int saw_eh_return;
-static htab_t condition_table;
-
-static void add_condition (const char *);
static void write_header (void);
static void write_conditions (void);
static int write_one_condition (void **, void *);
-/* Record the C test expression EXPR in the condition_table.
- Duplicates clobber previous entries, which leaks memory, but
- we don't care for this application. */
-
-static void
-add_condition (const char *expr)
-{
- struct c_test *test;
-
- if (expr[0] == 0)
- return;
-
- test = (struct c_test *) xmalloc (sizeof (struct c_test));
- test->expr = expr;
-
- *(htab_find_slot (condition_table, test, INSERT)) = test;
-}
-
/* Generate the header for insn-conditions.c. */
static void
machine description file. */\n\
\n\
#include \"bconfig.h\"\n\
-#include \"insn-constants.h\"\n");
-
- puts ("\
+#include \"system.h\"\n\
+\n\
+/* It is necessary, but not entirely safe, to include the headers below\n\
+ in a generator program. As a defensive measure, don't do so when the\n\
+ table isn't going to have anything in it. */\n\
+#if GCC_VERSION >= 3001\n\
+\n\
/* Do not allow checking to confuse the issue. */\n\
#undef ENABLE_CHECKING\n\
#undef ENABLE_TREE_CHECKING\n\
#undef ENABLE_RTL_CHECKING\n\
#undef ENABLE_RTL_FLAG_CHECKING\n\
#undef ENABLE_GC_CHECKING\n\
-#undef ENABLE_GC_ALWAYS_COLLECT\n");
-
- puts ("\
-#include \"system.h\"\n\
+#undef ENABLE_GC_ALWAYS_COLLECT\n\
+\n\
#include \"coretypes.h\"\n\
#include \"tm.h\"\n\
+#include \"insn-constants.h\"\n\
#include \"rtl.h\"\n\
#include \"tm_p.h\"\n\
-#include \"function.h\"\n");
-
- puts ("\
+#include \"function.h\"\n\
+\n\
/* Fake - insn-config.h doesn't exist yet. */\n\
#define MAX_RECOG_OPERANDS 10\n\
#define MAX_DUP_OPERANDS 10\n\
-#define MAX_INSNS_PER_SPLIT 5\n");
-
- puts ("\
+#define MAX_INSNS_PER_SPLIT 5\n\
+\n\
#include \"regs.h\"\n\
#include \"recog.h\"\n\
#include \"real.h\"\n\
#include \"resource.h\"\n\
#include \"toplev.h\"\n\
#include \"reload.h\"\n\
-#include \"gensupport.h\"\n");
+#include \"tm-constrs.h\"\n");
if (saw_eh_return)
puts ("#define HAVE_eh_return 1");
extern rtx insn;\n\
extern rtx ins1;\n\
extern rtx operands[];\n\
-extern int next_insn_tests_no_inequality (rtx);\n");
-
- puts ("\
-/* If we don't have __builtin_constant_p, or it's not acceptable in\n\
- array initializers, fall back to assuming that all conditions\n\
- potentially vary at run time. It works in 3.0.1 and later; 3.0\n\
- only when not optimizing. */\n\
-#if (GCC_VERSION >= 3001) || ((GCC_VERSION == 3000) && !__OPTIMIZE__)\n\
-# define MAYBE_EVAL(expr) (__builtin_constant_p(expr) ? (int) (expr) : -1)\n\
-#else\n\
-# define MAYBE_EVAL(expr) -1\n\
-#endif\n");
+\n\
+#endif /* gcc >= 3.0.1 */\n");
}
/* Write out one entry in the conditions table, using the data pointed
to by SLOT. Each entry looks like this:
- { "! optimize_size && ! TARGET_READ_MODIFY_WRITE",
- MAYBE_EVAL (! optimize_size && ! TARGET_READ_MODIFY_WRITE) }, */
+
+ { "! optimize_size && ! TARGET_READ_MODIFY_WRITE",
+ __builtin_constant_p (! optimize_size && ! TARGET_READ_MODIFY_WRITE)
+ ? (int) (! optimize_size && ! TARGET_READ_MODIFY_WRITE)
+ : -1) }, */
static int
-write_one_condition (void **slot, void *dummy ATTRIBUTE_UNUSED)
+write_one_condition (void **slot, void * ARG_UNUSED (dummy))
{
const struct c_test *test = * (const struct c_test **) slot;
const char *p;
+ print_rtx_ptr_loc (test->expr);
fputs (" { \"", stdout);
for (p = test->expr; *p; p++)
{
- if (*p == '\n')
- fputs ("\\n\\\n", stdout);
- else if (*p == '"')
- fputs ("\\\"", stdout);
- else
- putchar (*p);
+ switch (*p)
+ {
+ case '\n': fputs ("\\n\\", stdout); break;
+ case '\\':
+ case '\"': putchar ('\\'); break;
+ default: break;
+ }
+ putchar (*p);
}
- printf ("\",\n MAYBE_EVAL (%s) },\n", test->expr);
+ fputs ("\",\n __builtin_constant_p ", stdout);
+ print_c_condition (test->expr);
+ fputs ("\n ? (int) ", stdout);
+ print_c_condition (test->expr);
+ fputs ("\n : -1 },\n", stdout);
return 1;
}
write_conditions (void)
{
puts ("\
+/* Structure definition duplicated from gensupport.h rather than\n\
+ drag in that file and its dependencies. */\n\
+struct c_test\n\
+{\n\
+ const char *expr;\n\
+ int value;\n\
+};\n\
+\n\
/* This table lists each condition found in the machine description.\n\
Each condition is mapped to its truth value (0 or 1), or -1 if that\n\
- cannot be calculated at compile time. */\n\
+ cannot be calculated at compile time.\n\
+ If we don't have __builtin_constant_p, or it's not acceptable in array\n\
+ initializers, fall back to assuming that all conditions potentially\n\
+ vary at run time. It works in 3.0.1 and later; 3.0 only when not\n\
+ optimizing. */\n\
\n\
-const struct c_test insn_conditions[] = {");
+#if GCC_VERSION >= 3001\n\
+static const struct c_test insn_conditions[] = {\n");
- htab_traverse (condition_table, write_one_condition, 0);
+ traverse_c_tests (write_one_condition, 0);
- puts ("};\n");
+ puts ("\n};\n#endif /* gcc >= 3.0.1 */\n");
+}
- printf ("const size_t n_insn_conditions = %lu;\n",
- (unsigned long) htab_elements (condition_table));
- puts ("const int insn_elision_unavailable = 0;");
+/* Emit code which will convert the C-format table to a
+ (define_conditions) form, which the MD reader can understand.
+ The result will be added to the set of files scanned by
+ 'downstream' generators. */
+static void
+write_writer (void)
+{
+ puts ("int\n"
+ "main(void)\n"
+ "{\n"
+ " unsigned int i;\n"
+ " const char *p;\n"
+ " puts (\"(define_conditions [\");\n"
+ "#if GCC_VERSION >= 3001\n"
+ " for (i = 0; i < ARRAY_SIZE (insn_conditions); i++)\n"
+ " {\n"
+ " printf (\" (%d \\\"\", insn_conditions[i].value);\n"
+ " for (p = insn_conditions[i].expr; *p; p++)\n"
+ " {\n"
+ " switch (*p)\n"
+ " {\n"
+ " case '\\\\':\n"
+ " case '\\\"': putchar ('\\\\'); break;\n"
+ " default: break;\n"
+ " }\n"
+ " putchar (*p);\n"
+ " }\n"
+ " puts (\"\\\")\");\n"
+ " }\n"
+ "#endif /* gcc >= 3.0.1 */\n"
+ " puts (\"])\");\n"
+ " fflush (stdout);\n"
+ "return ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;\n"
+ "}");
}
int
progname = "genconditions";
- if (argc <= 1)
- fatal ("No input file name.");
-
- if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
+ if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
return (FATAL_EXIT_CODE);
- condition_table = htab_create (1000, hash_c_test, cmp_c_test, NULL);
-
/* Read the machine description. */
-
while (1)
{
desc = read_md_rtx (&pattern_lineno, &code);
case DEFINE_INSN:
case DEFINE_EXPAND:
- add_condition (XSTR (desc, 2));
+ add_c_test (XSTR (desc, 2), -1);
/* except.h needs to know whether there is an eh_return
pattern in the machine description. */
if (!strcmp (XSTR (desc, 0), "eh_return"))
case DEFINE_SPLIT:
case DEFINE_PEEPHOLE:
case DEFINE_PEEPHOLE2:
- add_condition (XSTR (desc, 1));
+ add_c_test (XSTR (desc, 1), -1);
break;
}
}
write_header ();
write_conditions ();
+ write_writer ();
fflush (stdout);
return (ferror (stdout) != 0 ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
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