-fdump-tree-vrp@r{[}-@var{n}@r{]} @gol
-ftree-vectorizer-verbose=@var{n} @gol
-fdump-tree-storeccp@r{[}-@var{n}@r{]} @gol
+-fdump-final-insns=@var{file} @gol
+-fcompare-debug@r{[}=@var{opts}@r{]} -fcompare-debug-second @gol
-feliminate-dwarf2-dups -feliminate-unused-debug-types @gol
-feliminate-unused-debug-symbols -femit-class-debug-always @gol
-fmem-report -fpre-ipa-mem-report -fpost-ipa-mem-report -fprofile-arcs @gol
-frandom-seed=@var{string} -fsched-verbose=@var{n} @gol
-fsel-sched-verbose -fsel-sched-dump-cfg -fsel-sched-pipelining-verbose @gol
-ftest-coverage -ftime-report -fvar-tracking @gol
--g -g@var{level} -gcoff -gdwarf-2 @gol
+-g -g@var{level} -gtoggle -gcoff -gdwarf-2 @gol
-ggdb -gstabs -gstabs+ -gvms -gxcoff -gxcoff+ @gol
-fno-merge-debug-strings -fno-dwarf2-cfi-asm @gol
-fdebug-prefix-map=@var{old}=@var{new} @gol
Instead use an additional @option{-g@var{level}} option to change the
debug level for DWARF2.
+@item -gtoggle
+@opindex gtoggle
+Turn off generation of debug info, if leaving out this option would have
+generated it, or turn it on at level 2 otherwise. The position of this
+argument in the command line does not matter, it takes effect after all
+other options are processed, and it does so only once, no matter how
+many times it is given. This is mainly intended to be used with
+@option{-fcompare-debug}.
+
+@item -fdump-final-insns=@var{file}
+@opindex fdump-final-insns=
+Dump the final internal representation (RTL) to @var{file}.
+
+@item -fcompare-debug@r{[}=@var{opts}@r{]}
+@opindex fcompare-debug
+@opindex fno-compare-debug
+If no error occurs during compilation, run the compiler a second time,
+adding @var{opts} and @option{-fcompare-debug-second} to the arguments
+passed to the second compilation. Dump the final internal
+representation in both compilations, and print an error if they differ.
+
+If the equal sign is omitted, the default @option{-gtoggle} is used.
+
+The environment variable @env{GCC_COMPARE_DEBUG}, if defined, non-empty
+and nonzero, implicitly enables @option{-fcompare-debug}. If
+@env{GCC_COMPARE_DEBUG} is defined to a string starting with a dash,
+then it is used for @var{opts}, otherwise the default @option{-gtoggle}
+is used.
+
+@option{-fcompare-debug=}, with the equal sign but without @var{opts},
+is equivalent to @option{-fno-compare-debug}, which disables the dumping
+of the final representation and the second compilation, preventing even
+@env{GCC_COMPARE_DEBUG} from taking effect.
+
+To verify full coverage during @option{-fcompare-debug} testing, set
+@env{GCC_COMPARE_DEBUG} to say @samp{-fcompare-debug-not-overridden},
+which GCC will reject as an invalid option in any actual compilation
+(rather than preprocessing, assembly or linking). To get just a
+warning, setting @env{GCC_COMPARE_DEBUG} to @samp{-w%n-fcompare-debug
+not overridden} will do.
+
+@item -fcompare-debug-second
+@opindex fcompare-debug-second
+This option is implicitly passed to the compiler for the second
+compilation requested by @option{-fcompare-debug}, along with options to
+silence warnings, and omitting other options that would cause
+side-effect compiler outputs to files or to the standard output. Dump
+files and preserved temporary files are renamed so as to contain the
+@code{.gk} additional extension during the second compilation, to avoid
+overwriting those generated by the first.
+
+When this option is passed to the compiler driver, it causes the
+@emph{first} compilation to be skipped, which makes it useful for little
+other than debugging the compiler proper.
+
@item -feliminate-dwarf2-dups
@opindex feliminate-dwarf2-dups
Compress DWARF2 debugging information by eliminating duplicated
#include "flags.h"
#include "opts.h"
+#ifdef HAVE_MMAP_FILE
+# include <sys/mman.h>
+# ifdef HAVE_MINCORE
+/* This is on Solaris. */
+# include <sys/types.h>
+# endif
+#endif
+
+#ifndef MAP_FAILED
+# define MAP_FAILED ((void *)-1)
+#endif
+
/* By default there is no special suffix for target executables. */
/* FIXME: when autoconf is fixed, remove the host check - dj */
#if defined(TARGET_EXECUTABLE_SUFFIX) && defined(HOST_EXECUTABLE_SUFFIX)
static const char *version_compare_spec_function (int, const char **);
static const char *include_spec_function (int, const char **);
static const char *print_asm_header_spec_function (int, const char **);
+static const char *compare_debug_dump_opt_spec_function (int, const char **);
+static const char *compare_debug_self_opt_spec_function (int, const char **);
+static const char *compare_debug_auxbase_opt_spec_function (int, const char **);
\f
/* The Specs Language
static const char *cc1_options =
"%{pg:%{fomit-frame-pointer:%e-pg and -fomit-frame-pointer are incompatible}}\
%1 %{!Q:-quiet} -dumpbase %B %{d*} %{m*} %{a*}\
- %{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}%{!c:%{!S:-auxbase %b}}\
+ %{fcompare-debug-second:%:compare-debug-auxbase-opt(%b)} \
+ %{!fcompare-debug-second:%{c|S:%{o*:-auxbase-strip %*}%{!o*:-auxbase %b}}}%{!c:%{!S:-auxbase %b}} \
%{g*} %{O*} %{W*&pedantic*} %{w} %{std*&ansi&trigraphs}\
%{v:-version} %{pg:-p} %{p} %{f*} %{undef}\
%{Qn:-fno-ident} %{--help:--help}\
static const char *invoke_as =
#ifdef AS_NEEDS_DASH_FOR_PIPED_INPUT
-"%{!S:-o %|.s |\n as %(asm_options) %|.s %A }";
+"%{fcompare-debug=*:%:compare-debug-dump-opt()}\
+ %{!S:-o %|.s |\n as %(asm_options) %|.s %A }";
#else
-"%{!S:-o %|.s |\n as %(asm_options) %m.s %A }";
+"%{fcompare-debug=*:%:compare-debug-dump-opt()}\
+ %{!S:-o %|.s |\n as %(asm_options) %m.s %A }";
#endif
/* Some compilers have limits on line lengths, and the multilib_select
{ "version-compare", version_compare_spec_function },
{ "include", include_spec_function },
{ "print-asm-header", print_asm_header_spec_function },
+ { "compare-debug-dump-opt", compare_debug_dump_opt_spec_function },
+ { "compare-debug-self-opt", compare_debug_self_opt_spec_function },
+ { "compare-debug-auxbase-opt", compare_debug_auxbase_opt_spec_function },
#ifdef EXTRA_SPEC_FUNCTIONS
EXTRA_SPEC_FUNCTIONS
#endif
static int n_switches;
+/* Set to zero if -fcompare-debug is disabled, positive if it's
+ enabled and we're running the first compilation, negative if it's
+ enabled and we're running the second compilation. For most of the
+ time, it's in the range -1..1, but it can be temporarily set to 2
+ or 3 to indicate that the -fcompare-debug flags didn't come from
+ the command-line, but rather from the GCC_COMPARE_DEBUG environment
+ variable, until a synthesized -fcompare-debug flag is added to the
+ command line. */
+int compare_debug;
+
+/* Set to nonzero if we've seen the -fcompare-debug-second flag. */
+int compare_debug_second;
+
+/* Set to the flags that should be passed to the second compilation in
+ a -fcompare-debug compilation. */
+const char *compare_debug_opt;
+
+static struct switchstr *switches_debug_check[2];
+
+static int n_switches_debug_check[2];
+
+static char *debug_check_temp_file[2];
+
/* Language is one of three things:
1) The name of a real programming language.
print_multi_os_directory = 1;
else if (! strcmp (argv[i], "-print-sysroot-headers-suffix"))
print_sysroot_headers_suffix = 1;
+ else if (! strcmp (argv[i], "-fcompare-debug-second"))
+ {
+ compare_debug_second = 1;
+ n_switches++;
+ }
+ else if (! strcmp (argv[i], "-fno-compare-debug"))
+ {
+ argv[i] = "-fcompare-debug=";
+ goto compare_debug_with_arg;
+ }
+ else if (! strcmp (argv[i], "-fcompare-debug"))
+ {
+ argv[i] = "-fcompare-debug=-gtoggle";
+ goto compare_debug_with_arg;
+ }
+#define OPT "-fcompare-debug="
+ else if (! strncmp (argv[i], OPT, sizeof (OPT) - 1))
+ {
+ const char *opt;
+ compare_debug_with_arg:
+ opt = argv[i] + sizeof (OPT) - 1;
+#undef OPT
+ if (*opt)
+ compare_debug = 1;
+ else
+ compare_debug = -1;
+ if (compare_debug < 0)
+ compare_debug_opt = NULL;
+ else
+ compare_debug_opt = opt;
+ n_switches++;
+ }
else if (! strncmp (argv[i], "-Wa,", 4))
{
int prev, j;
use_pipes = 0;
}
+ if (!compare_debug)
+ {
+ const char *gcd = getenv ("GCC_COMPARE_DEBUG");
+
+ if (gcd && gcd[0] == '-')
+ {
+ compare_debug = 2;
+ compare_debug_opt = gcd;
+ n_switches++;
+ }
+ else if (gcd && *gcd && strcmp (gcd, "0"))
+ {
+ compare_debug = 3;
+ compare_debug_opt = "-gtoggle";
+ n_switches++;
+ }
+ }
+ else if (compare_debug < 0)
+ {
+ compare_debug = 0;
+ gcc_assert (!compare_debug_opt);
+ }
+
/* Set up the search paths. We add directories that we expect to
contain GNU Toolchain components before directories specified by
the machine description so that we will find GNU components (like
if (n_infiles == last_language_n_infiles && spec_lang != 0)
error ("warning: '-x %s' after last input file has no effect", spec_lang);
+ if (compare_debug == 2 || compare_debug == 3)
+ {
+ switches[n_switches].part1 = concat ("fcompare-debug=",
+ compare_debug_opt,
+ NULL);
+ switches[n_switches].args = 0;
+ switches[n_switches].live_cond = 0;
+ switches[n_switches].validated = 0;
+ switches[n_switches].ordering = 0;
+ n_switches++;
+ compare_debug = 1;
+ }
+
/* Ensure we only invoke each subprocess once. */
if (print_subprocess_help || print_help_list || print_version)
{
if (argbuf_index > 0)
{
- int i, first;
+ int i;
- first = n_switches;
- n_switches += argbuf_index;
- switches = XRESIZEVEC (struct switchstr, switches, n_switches + 1);
+ switches = XRESIZEVEC (struct switchstr, switches,
+ n_switches + argbuf_index + 1);
- switches[n_switches] = switches[first];
for (i = 0; i < argbuf_index; i++)
{
struct switchstr *sw;
+ const char *p = argbuf[i];
+ int c = *p;
/* Each switch should start with '-'. */
- if (argbuf[i][0] != '-')
+ if (c != '-')
fatal ("switch '%s' does not start with '-'", argbuf[i]);
- sw = &switches[i + first];
- sw->part1 = &argbuf[i][1];
- sw->args = 0;
+ p++;
+ c = *p;
+
+ sw = &switches[n_switches++];
+ sw->part1 = p;
sw->live_cond = 0;
sw->validated = 0;
sw->ordering = 0;
+
+ /* Deal with option arguments in separate argv elements. */
+ if ((SWITCH_TAKES_ARG (c) > (p[1] != 0))
+ || WORD_SWITCH_TAKES_ARG (p))
+ {
+ int j = 0;
+ int n_args = WORD_SWITCH_TAKES_ARG (p);
+
+ if (n_args == 0)
+ {
+ /* Count only the option arguments in separate argv elements. */
+ n_args = SWITCH_TAKES_ARG (c) - (p[1] != 0);
+ }
+ if (i + n_args >= argbuf_index)
+ fatal ("argument to '-%s' is missing", p);
+ sw->args
+ = XNEWVEC (const char *, n_args + 1);
+ while (j < n_args)
+ sw->args[j++] = argbuf[++i];
+ /* Null-terminate the vector. */
+ sw->args[j] = 0;
+ }
+ else if (strchr (switches_need_spaces, c))
+ {
+ /* On some systems, ld cannot handle some options without
+ a space. So split the option from its argument. */
+ char *part1 = XNEWVEC (char, 2);
+ part1[0] = c;
+ part1[1] = '\0';
+
+ sw->part1 = part1;
+ sw->args = XNEWVEC (const char *, 2);
+ sw->args[0] = xstrdup (p+1);
+ sw->args[1] = 0;
+ }
+ else
+ sw->args = 0;
}
+
+ switches[n_switches].part1 = 0;
}
}
obstack_grow (&obstack, save_temps_prefix, save_temps_length);
else
obstack_grow (&obstack, input_basename, basename_length);
+ if (compare_debug < 0)
+ obstack_grow (&obstack, ".gk", 3);
arg_going = 1;
break;
obstack_grow (&obstack, save_temps_prefix, save_temps_length);
else
obstack_grow (&obstack, input_basename, suffixed_basename_length);
+ if (compare_debug < 0)
+ obstack_grow (&obstack, ".gk", 3);
arg_going = 1;
break;
suffix_length += strlen (TARGET_OBJECT_SUFFIX);
}
+ if (compare_debug < 0)
+ {
+ suffix = concat (".gk", suffix, NULL);
+ suffix_length += 3;
+ }
+
/* If -save-temps=obj and -o were specified, use that for the
temp file. */
if (save_temps_length)
const char *name = switches[switchnum].part1;
int i;
+ /* If we already processed this switch and determined if it was
+ live or not, return our past determination. */
+ if (switches[switchnum].live_cond != 0)
+ return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0
+ && (switches[switchnum].live_cond & SWITCH_FALSE) == 0
+ && (switches[switchnum].live_cond & SWITCH_IGNORE) == 0);
+
/* In the common case of {<at-most-one-letter>*}, a negating
switch would always match, so ignore that case. We will just
send the conflicting switches to the compiler phase. */
if (prefix_length >= 0 && prefix_length <= 1)
return 1;
- /* If we already processed this switch and determined if it was
- live or not, return our past determination. */
- if (switches[switchnum].live_cond != 0)
- return ((switches[switchnum].live_cond & SWITCH_LIVE) != 0
- && (switches[switchnum].live_cond & SWITCH_FALSE) == 0);
-
/* Now search for duplicate in a manner that depends on the name. */
switch (*name)
{
kill (getpid (), signum);
}
+/* Compare the contents of the two files named CMPFILE[0] and
+ CMPFILE[1]. Return zero if they're identical, nonzero
+ otherwise. */
+
+static int
+compare_files (char *cmpfile[])
+{
+ int ret = 0;
+ FILE *temp[2] = { NULL, NULL };
+ int i;
+
+#if HAVE_MMAP_FILE
+ {
+ size_t length[2];
+ void *map[2] = { NULL, NULL };
+
+ for (i = 0; i < 2; i++)
+ {
+ struct stat st;
+
+ if (stat (cmpfile[i], &st) < 0 || !S_ISREG (st.st_mode))
+ {
+ error ("%s: could not determine length of compare-debug file %s",
+ input_filename, cmpfile[i]);
+ ret = 1;
+ break;
+ }
+
+ length[i] = st.st_size;
+ }
+
+ if (!ret && length[0] != length[1])
+ {
+ error ("%s: -fcompare-debug failure (length)", input_filename);
+ ret = 1;
+ }
+
+ if (!ret)
+ for (i = 0; i < 2; i++)
+ {
+ int fd = open (cmpfile[i], O_RDONLY);
+ if (fd < 0)
+ {
+ error ("%s: could not open compare-debug file %s",
+ input_filename, cmpfile[i]);
+ ret = 1;
+ break;
+ }
+
+ map[i] = mmap (NULL, length[i], PROT_READ, MAP_PRIVATE, fd, 0);
+ close (fd);
+
+ if (map[i] == (void *) MAP_FAILED)
+ {
+ ret = -1;
+ break;
+ }
+ }
+
+ if (!ret)
+ {
+ if (memcmp (map[0], map[1], length[0]) != 0)
+ {
+ error ("%s: -fcompare-debug failure", input_filename);
+ ret = 1;
+ }
+ }
+
+ for (i = 0; i < 2; i++)
+ if (map[i])
+ munmap (map[i], length[i]);
+
+ if (ret >= 0)
+ return ret;
+
+ ret = 0;
+ }
+#endif
+
+ for (i = 0; i < 2; i++)
+ {
+ temp[i] = fopen (cmpfile[i], "r");
+ if (!temp[i])
+ {
+ error ("%s: could not open compare-debug file %s",
+ input_filename, cmpfile[i]);
+ ret = 1;
+ break;
+ }
+ }
+
+ if (!ret && temp[0] && temp[1])
+ for (;;)
+ {
+ int c0, c1;
+ c0 = fgetc (temp[0]);
+ c1 = fgetc (temp[1]);
+
+ if (c0 != c1)
+ {
+ error ("%s: -fcompare-debug failure",
+ input_filename);
+ ret = 1;
+ break;
+ }
+
+ if (c0 == EOF)
+ break;
+ }
+
+ for (i = 1; i >= 0; i--)
+ {
+ if (temp[i])
+ fclose (temp[i]);
+ }
+
+ return ret;
+}
+
extern int main (int, char **);
int
for (i = 0; i < ARRAY_SIZE (driver_self_specs); i++)
do_self_spec (driver_self_specs[i]);
+ if (compare_debug)
+ {
+ enum save_temps save;
+
+ if (!compare_debug_second)
+ {
+ n_switches_debug_check[1] = n_switches;
+ switches_debug_check[1] = XDUPVEC (struct switchstr, switches,
+ n_switches + 1);
+
+ do_self_spec ("%:compare-debug-self-opt()");
+ n_switches_debug_check[0] = n_switches;
+ switches_debug_check[0] = switches;
+
+ n_switches = n_switches_debug_check[1];
+ switches = switches_debug_check[1];
+ }
+
+ /* Avoid crash when computing %j in this early. */
+ save = save_temps_flag;
+ save_temps_flag = SAVE_TEMPS_NONE;
+
+ compare_debug = -compare_debug;
+ do_self_spec ("%:compare-debug-self-opt()");
+
+ save_temps_flag = save;
+
+ if (!compare_debug_second)
+ {
+ n_switches_debug_check[1] = n_switches;
+ switches_debug_check[1] = switches;
+ compare_debug = -compare_debug;
+ n_switches = n_switches_debug_check[0];
+ switches = switches_debug_check[0];
+ }
+ }
+
/* If not cross-compiling, look for executables in the standard
places. */
if (*cross_compile == '0')
}
else
{
+ if (compare_debug)
+ {
+ if (debug_check_temp_file[0])
+ free (debug_check_temp_file[0]);
+ debug_check_temp_file[0] = NULL;
+
+ if (debug_check_temp_file[1])
+ free (debug_check_temp_file[1]);
+ debug_check_temp_file[1] = NULL;
+ }
+
value = do_spec (input_file_compiler->spec);
infiles[i].compiled = true;
if (value < 0)
this_file_error = 1;
+ else if (compare_debug && debug_check_temp_file[0])
+ {
+ if (verbose_flag)
+ error ("Recompiling with -fcompare-debug");
+
+ compare_debug = -compare_debug;
+ n_switches = n_switches_debug_check[1];
+ switches = switches_debug_check[1];
+
+ value = do_spec (input_file_compiler->spec);
+
+ compare_debug = -compare_debug;
+ n_switches = n_switches_debug_check[0];
+ switches = switches_debug_check[0];
+
+ if (value < 0)
+ {
+ error ("during -fcompare-debug recompilation");
+ this_file_error = 1;
+ }
+
+ gcc_assert (debug_check_temp_file[1]
+ && strcmp (debug_check_temp_file[0],
+ debug_check_temp_file[1]));
+
+ if (verbose_flag)
+ error ("Comparing final insns dumps");
+
+ if (compare_files (debug_check_temp_file))
+ this_file_error = 1;
+ }
+
+ if (compare_debug)
+ {
+ if (debug_check_temp_file[0])
+ free (debug_check_temp_file[0]);
+ debug_check_temp_file[0] = NULL;
+
+ if (debug_check_temp_file[1])
+ free (debug_check_temp_file[1]);
+ debug_check_temp_file[1] = NULL;
+ }
}
}
fflush (stdout);
return NULL;
}
+
+/* %:compare-debug-dump-opt spec function. Save the last argument,
+ expected to be the last -fdump-final-insns option, or generate a
+ temporary. */
+
+static const char *
+compare_debug_dump_opt_spec_function (int arg,
+ const char **argv ATTRIBUTE_UNUSED)
+{
+ const char *ret;
+ char *name;
+ int which;
+
+ if (arg != 0)
+ fatal ("too many arguments to %%:compare-debug-dump-opt");
+
+ if (!compare_debug)
+ return NULL;
+
+ do_spec_2 ("%{fdump-final-insns=*:%*}");
+ do_spec_1 (" ", 0, NULL);
+
+ if (argbuf_index > 0)
+ {
+ name = xstrdup (argv[argbuf_index - 1]);
+ ret = NULL;
+ }
+ else
+ {
+#define OPT "-fdump-final-insns="
+ ret = "-fdump-final-insns=%g.gkd";
+
+ do_spec_2 (ret + sizeof (OPT) - 1);
+ do_spec_1 (" ", 0, NULL);
+#undef OPT
+
+ gcc_assert (argbuf_index > 0);
+
+ name = xstrdup (argbuf[argbuf_index - 1]);
+ }
+
+ which = compare_debug < 0;
+ debug_check_temp_file[which] = name;
+
+#if 0
+ error ("compare-debug: [%i]=\"%s\", ret %s", which, name, ret);
+#endif
+
+ return ret;
+}
+
+static const char *debug_auxbase_opt;
+
+/* %:compare-debug-self-opt spec function. Expands to the options
+ that are to be passed in the second compilation of
+ compare-debug. */
+
+static const char *
+compare_debug_self_opt_spec_function (int arg,
+ const char **argv ATTRIBUTE_UNUSED)
+{
+ if (arg != 0)
+ fatal ("too many arguments to %%:compare-debug-self-opt");
+
+ if (compare_debug >= 0)
+ return NULL;
+
+ do_spec_2 ("%{c|S:%{o*:%*}}");
+ do_spec_1 (" ", 0, NULL);
+
+ if (argbuf_index > 0)
+ debug_auxbase_opt = concat ("-auxbase-strip ",
+ argbuf[argbuf_index - 1],
+ NULL);
+ else
+ debug_auxbase_opt = NULL;
+
+ return concat ("\
+%<o %<MD %<MMD %<MF* %<MG %<MP %<MQ* %<MT* \
+%<fdump-final-insns=* -w -S -o %j \
+%{!fcompare-debug-second:-fcompare-debug-second} \
+", compare_debug_opt, NULL);
+}
+
+/* %:compare-debug-auxbase-opt spec function. Expands to the auxbase
+ options that are to be passed in the second compilation of
+ compare-debug. It expects, as an argument, the basename of the
+ current input file name, with the .gk suffix appended to it. */
+
+static const char *
+compare_debug_auxbase_opt_spec_function (int arg,
+ const char **argv)
+{
+ char *name;
+ int len;
+
+ if (arg == 0)
+ fatal ("too few arguments to %%:compare-debug-auxbase-opt");
+
+ if (arg != 1)
+ fatal ("too many arguments to %%:compare-debug-auxbase-opt");
+
+ if (compare_debug >= 0)
+ return NULL;
+
+ len = strlen (argv[0]);
+ if (len < 3 || strcmp (argv[0] + len - 3, ".gk") != 0)
+ fatal ("argument to %%:compare-debug-auxbase-opt does not end in .gk");
+
+ if (debug_auxbase_opt)
+ return debug_auxbase_opt;
+
+#define OPT "-auxbase "
+
+ len -= 3;
+ name = (char*) xmalloc (sizeof (OPT) + len);
+ memcpy (name, OPT, sizeof (OPT) - 1);
+ memcpy (name + sizeof (OPT) - 1, argv[0], len);
+ name[sizeof (OPT) - 1 + len] = '\0';
+
+ return name;
+}
projects / thirdparty / gcc.git / commitdiff
