struct varpool_node *vnode;
unsigned i, n_sets;
cgraph_node_set set;
+ varpool_node_set vset;
cgraph_node_set_iterator csi;
+ varpool_node_set_iterator vsi;
gcc_assert (flag_wpa);
- /* At moment we make no attempt to figure out who is refering the variables,
- so all must become global.
-
- Constant pool references use internal labels and thus can not be made global.
- It is sensible to keep those ltrans local to allow better optimization. */
- for (vnode = varpool_nodes; vnode; vnode = vnode->next)
- if (!vnode->externally_visible && vnode->analyzed
- && !DECL_IN_CONSTANT_POOL (vnode->decl))
- {
- TREE_PUBLIC (vnode->decl) = 1;
- DECL_VISIBILITY (vnode->decl) = VISIBILITY_HIDDEN;
- }
n_sets = VEC_length (cgraph_node_set, lto_cgraph_node_sets);
for (i = 0; i < n_sets; i++)
{
set = VEC_index (cgraph_node_set, lto_cgraph_node_sets, i);
+ vset = VEC_index (varpool_node_set, lto_varpool_node_sets, i);
/* If node has either address taken (and we have no clue from where)
or it is called from other partition, it needs to be globalized. */
for (csi = csi_start (set); !csi_end_p (csi); csi_next (&csi))
{
struct cgraph_node *node = csi_node (csi);
- bool globalize = node->address_taken || node->local.vtable_method;
+ bool globalize = node->local.vtable_method;
struct cgraph_edge *e;
if (node->local.externally_visible)
continue;
+ if (!globalize
+ && referenced_from_other_partition_p (&node->ref_list, set, vset))
+ globalize = true;
for (e = node->callers; e && !globalize; e = e->next_caller)
{
struct cgraph_node *caller = e->caller;
}
if (globalize)
{
+ gcc_assert (flag_wpa);
TREE_PUBLIC (node->decl) = 1;
DECL_VISIBILITY (node->decl) = VISIBILITY_HIDDEN;
if (node->same_body)
}
}
}
+ for (vsi = vsi_start (vset); !vsi_end_p (vsi); vsi_next (&vsi))
+ {
+ vnode = vsi_node (vsi);
+ /* Constant pool references use internal labels and thus can not
+ be made global. It is sensible to keep those ltrans local to
+ allow better optimization. */
+ if (!DECL_IN_CONSTANT_POOL (vnode->decl)
+ && !vnode->externally_visible && vnode->analyzed
+ && referenced_from_other_partition_p (&vnode->ref_list, set, vset))
+ {
+ gcc_assert (flag_wpa);
+ TREE_PUBLIC (vnode->decl) = 1;
+ DECL_VISIBILITY (vnode->decl) = VISIBILITY_HIDDEN;
+ }
+ }
}
}
return output_files;
}
-/* Template of LTRANS dumpbase suffix. */
-#define DUMPBASE_SUFFIX ".ltrans18446744073709551615"
-
/* Perform local transformations (LTRANS) on the files in the NULL-terminated
FILES array. These should have been written previously by
lto_wpa_write_files (). Transformations are performed via executing
COLLECT_GCC for reach file. */
static void
-lto_execute_ltrans (char *const *files)
+lto_write_ltrans_list (char *const *files)
{
- struct pex_obj *pex;
- const char *collect_gcc_options, *collect_gcc;
- struct obstack env_obstack;
- const char **argv;
- const char **argv_ptr;
- const char *errmsg;
- size_t i, j;
- int err;
- int status;
FILE *ltrans_output_list_stream = NULL;
- bool seen_dumpbase = false;
- char *dumpbase_suffix = NULL;
-
- timevar_push (TV_WHOPR_WPA_LTRANS_EXEC);
-
- /* Get the driver and options. */
- collect_gcc = getenv ("COLLECT_GCC");
- if (!collect_gcc)
- fatal_error ("environment variable COLLECT_GCC must be set");
-
- /* Set the CFLAGS environment variable. */
- collect_gcc_options = getenv ("COLLECT_GCC_OPTIONS");
- if (!collect_gcc_options)
- fatal_error ("environment variable COLLECT_GCC_OPTIONS must be set");
-
- /* Count arguments. */
- i = 0;
- for (j = 0; collect_gcc_options[j] != '\0'; ++j)
- if (collect_gcc_options[j] == '\'')
- ++i;
-
- if (i % 2 != 0)
- fatal_error ("malformed COLLECT_GCC_OPTIONS");
-
- /* Initalize the arguments for the LTRANS driver. */
- argv = XNEWVEC (const char *, 8 + i / 2);
- argv_ptr = argv;
- *argv_ptr++ = collect_gcc;
- *argv_ptr++ = "-xlto";
- for (j = 0; collect_gcc_options[j] != '\0'; ++j)
- if (collect_gcc_options[j] == '\'')
- {
- char *option;
-
- ++j;
- i = j;
- while (collect_gcc_options[j] != '\'')
- ++j;
- obstack_init (&env_obstack);
- obstack_grow (&env_obstack, &collect_gcc_options[i], j - i);
- if (seen_dumpbase)
- obstack_grow (&env_obstack, DUMPBASE_SUFFIX,
- sizeof (DUMPBASE_SUFFIX));
- else
- obstack_1grow (&env_obstack, 0);
- option = XOBFINISH (&env_obstack, char *);
- if (seen_dumpbase)
- {
- dumpbase_suffix = option + 7 + j - i;
- seen_dumpbase = false;
- }
-
- /* LTRANS does not need -fwpa nor -fltrans-*. */
- if (strncmp (option, "-fwpa", 5) != 0
- && strncmp (option, "-fltrans-", 9) != 0)
- {
- if (strncmp (option, "-dumpbase", 9) == 0)
- seen_dumpbase = true;
- *argv_ptr++ = option;
- }
- }
- *argv_ptr++ = "-fltrans";
+ unsigned i;
/* Open the LTRANS output list. */
- if (ltrans_output_list)
- {
- ltrans_output_list_stream = fopen (ltrans_output_list, "w");
- if (ltrans_output_list_stream == NULL)
- error ("opening LTRANS output list %s: %m", ltrans_output_list);
- }
+ if (!ltrans_output_list)
+ error ("no LTRANS output filename provided");
+
+ ltrans_output_list_stream = fopen (ltrans_output_list, "w");
+ if (ltrans_output_list_stream == NULL)
+ error ("opening LTRANS output list %s: %m", ltrans_output_list);
for (i = 0; files[i]; ++i)
{
size_t len;
- /* If the file is prefixed with a '*', it means that we do not
- need to re-compile it with LTRANS because it has not been
- modified by WPA. Skip it from the command line to
- lto_execute_ltrans, but add it to ltrans_output_list_stream
- so it is linked after we are done. */
- if (files[i][0] == '*')
- {
- size_t len = strlen (files[i]) - 1;
- if (ltrans_output_list_stream)
- if (fwrite (&files[i][1], 1, len, ltrans_output_list_stream) < len
- || fwrite ("\n", 1, 1, ltrans_output_list_stream) < 1)
- error ("writing to LTRANS output list %s: %m",
- ltrans_output_list);
- }
- else
- {
- char *output_name;
-
- /* Otherwise, add FILES[I] to lto_execute_ltrans command line
- and add the resulting file to LTRANS output list. */
-
- /* Replace the .o suffix with a .ltrans.o suffix and write
- the resulting name to the LTRANS output list. */
- obstack_init (&env_obstack);
- obstack_grow (&env_obstack, files[i], strlen (files[i]) - 2);
- obstack_grow (&env_obstack, ".ltrans.o", sizeof (".ltrans.o"));
- output_name = XOBFINISH (&env_obstack, char *);
- if (ltrans_output_list_stream)
- {
- len = strlen (output_name);
-
- if (fwrite (output_name, 1, len, ltrans_output_list_stream) < len
- || fwrite ("\n", 1, 1, ltrans_output_list_stream) < 1)
- error ("writing to LTRANS output list %s: %m",
- ltrans_output_list);
- }
-
- argv_ptr[0] = "-o";
- argv_ptr[1] = output_name;
- argv_ptr[2] = files[i];
- argv_ptr[3] = NULL;
-
- /* Append a sequence number to -dumpbase for LTRANS. */
- if (dumpbase_suffix)
- snprintf (dumpbase_suffix, sizeof (DUMPBASE_SUFFIX) - 7,
- "%lu", (unsigned long) i);
-
- /* Execute the driver. */
- pex = pex_init (0, "lto1", NULL);
- if (pex == NULL)
- fatal_error ("pex_init failed: %s", xstrerror (errno));
-
- errmsg = pex_run (pex, PEX_LAST | PEX_SEARCH, argv[0],
- CONST_CAST (char **, argv), NULL, NULL, &err);
- if (errmsg)
- fatal_error ("%s: %s", errmsg, xstrerror (err));
-
- if (!pex_get_status (pex, 1, &status))
- fatal_error ("can't get program status: %s", xstrerror (errno));
-
- if (status)
- {
- if (WIFSIGNALED (status))
- {
- int sig = WTERMSIG (status);
- fatal_error ("%s terminated with signal %d [%s]%s",
- argv[0], sig, strsignal (sig),
- WCOREDUMP (status) ? ", core dumped" : "");
- }
- else
- fatal_error ("%s terminated with status %d", argv[0], status);
- }
-
- pex_free (pex);
- }
+ len = strlen (files[i]);
+ if (fwrite (files[i], 1, len, ltrans_output_list_stream) < len
+ || fwrite ("\n", 1, 1, ltrans_output_list_stream) < 1)
+ error ("writing to LTRANS output list %s: %m",
+ ltrans_output_list);
}
/* Close the LTRANS output list. */
- if (ltrans_output_list_stream && fclose (ltrans_output_list_stream))
+ if (fclose (ltrans_output_list_stream))
error ("closing LTRANS output list %s: %m", ltrans_output_list);
-
- obstack_free (&env_obstack, NULL);
- free (argv);
-
- timevar_pop (TV_WHOPR_WPA_LTRANS_EXEC);
}
t = *tp;
*walk_subtrees = 0;
- if (pointer_set_contains (fixup_data->seen, t))
+ if (!t || pointer_set_contains (fixup_data->seen, t))
return NULL;
if (TREE_CODE (t) == VAR_DECL || TREE_CODE (t) == FUNCTION_DECL)
pointer_set_destroy (seen);
}
-/* Unlink a temporary LTRANS file unless requested otherwise. */
-
-static void
-lto_maybe_unlink (const char *file)
-{
- if (!getenv ("WPA_SAVE_LTRANS"))
- {
- if (unlink_if_ordinary (file))
- error ("deleting LTRANS input file %s: %m", file);
- }
- else
- fprintf (stderr, "[Leaving LTRANS input file %s]\n", file);
-}
-
/* Read the options saved from each file in the command line. Called
from lang_hooks.post_options which is called by process_options
right before all the options are used to initialize the compiler.
do_whole_program_analysis (void)
{
char **output_files;
- size_t i;
/* Note that since we are in WPA mode, materialize_cgraph will not
actually read in all the function bodies. It only materializes
if (flag_lto_report)
print_lto_report ();
- lto_execute_ltrans (output_files);
-
- for (i = 0; output_files[i]; ++i)
- {
- if (output_files[i][0] != '*')
- lto_maybe_unlink (output_files[i]);
-
- free (output_files[i]);
- }
+ lto_write_ltrans_list (output_files);
XDELETEVEC (output_files);
}
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