re PR lto/65536 (LTO line number information garbled)
PR lto/65536 * lto-streamer.h (class lto_location_cache): New. (struct data_in): Add location_cache. (lto_input_location): Update prototype. (stream_input_location_now): New. * streamer-hooks.h (struct streamer_hooks): Make input_location to take pointer to location. (stream_input_location): Update. * ipa-devirt.c: Include streamer-hooks.h and lto-streamer.h (warn_odr): Apply location cache before warning. (lto_input_location): Update prototype. * gimple-streamer-in.c (input_phi, input_gimple_stmt): Use stream_input_location_now. * lto/lto.c (unify_scc): Revert location cache when unification suceeded. (lto_read_decls): Accept location cache after sucess; apply location cache before calling debug hooks. * lto-streamer-in.c (lto_location_cache::current_cache): New static variable. (lto_location_cache::cmp_loc): New function. (lto_location_cache::apply_location_cache): New function. (lto_location_cache::accept_location_cache): New function. (lto_location_cache::revert_location_cache): New function. (lto_location_cache::input_location): New function. (lto_input_location): Do location caching. (stream_input_location_now): New function. (input_eh_region, input_struct_function_base): Use stream_input_location_now. (lto_data_in_create): use new. (lto_data_in_delete): Use delete. * tree-streamer-in.c (unpack_ts_block_value_fields, unpack_ts_omp_clause_value_fields, streamer_read_tree_bitfields, lto_input_ts_exp_tree_pointers): Update for cached location api. From-SVN: r221720
This commit is contained in:
parent
38147a2a4e
commit
eaeec5ecfa
8 changed files with 276 additions and 39 deletions
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@ -87,7 +87,9 @@ input_phi (struct lto_input_block *ib, basic_block bb, struct data_in *data_in,
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tree def = stream_read_tree (ib, data_in);
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int src_index = streamer_read_uhwi (ib);
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bitpack_d bp = streamer_read_bitpack (ib);
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location_t arg_loc = stream_input_location (&bp, data_in);
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/* Do not cache a location - we do not have API to get pointer to the
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location in PHI statement and we may trigger reallocation. */
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location_t arg_loc = stream_input_location_now (&bp, data_in);
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basic_block sbb = BASIC_BLOCK_FOR_FN (fn, src_index);
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edge e = NULL;
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@ -134,8 +136,9 @@ input_gimple_stmt (struct lto_input_block *ib, struct data_in *data_in,
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has_hist = bp_unpack_value (&bp, 1);
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stmt->subcode = bp_unpack_var_len_unsigned (&bp);
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/* Read location information. */
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gimple_set_location (stmt, stream_input_location (&bp, data_in));
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/* Read location information. Caching here makes no sense until streamer
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cache can handle the following gimple_set_block. */
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gimple_set_location (stmt, stream_input_location_now (&bp, data_in));
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/* Read lexical block reference. */
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gimple_set_block (stmt, stream_read_tree (ib, data_in));
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@ -166,6 +166,8 @@ along with GCC; see the file COPYING3. If not see
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#include "gimple-pretty-print.h"
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#include "stor-layout.h"
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#include "intl.h"
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#include "streamer-hooks.h"
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#include "lto-streamer.h"
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/* Hash based set of pairs of types. */
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typedef struct
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@ -935,6 +937,10 @@ warn_odr (tree t1, tree t2, tree st1, tree st2,
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if (!warn || !TYPE_NAME(t1))
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return;
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/* ODR warnings are output druing LTO streaming; we must apply location
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cache for potential warnings to be output correctly. */
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lto_location_cache::current_cache->apply_location_cache ();
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if (!warning_at (DECL_SOURCE_LOCATION (TYPE_NAME (t1)), OPT_Wodr,
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"type %qT violates one definition rule",
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t1))
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@ -172,47 +172,174 @@ canon_file_name (const char *string)
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}
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}
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/* Pointer to currently alive instance of lto_location_cache. */
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/* Read a location bitpack from input block IB. */
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lto_location_cache *lto_location_cache::current_cache;
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location_t
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lto_input_location (struct bitpack_d *bp, struct data_in *data_in)
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/* Sort locations in source order. Start with file from last application. */
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int
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lto_location_cache::cmp_loc (const void *pa, const void *pb)
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{
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static const char *current_file;
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static int current_line;
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static int current_col;
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const cached_location *a = ((const cached_location *)pa);
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const cached_location *b = ((const cached_location *)pb);
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const char *current_file = current_cache->current_file;
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int current_line = current_cache->current_line;
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if (a->file == current_file && b->file != current_file)
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return -1;
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if (a->file != current_file && b->file == current_file)
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return 1;
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if (a->file == current_file && b->file == current_file)
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{
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if (a->line == current_line && b->line != current_line)
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return -1;
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if (a->line != current_line && b->line == current_line)
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return 1;
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}
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if (a->file != b->file)
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return strcmp (a->file, b->file);
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if (a->line != b->line)
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return a->line - b->line;
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return a->col - b->col;
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}
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/* Apply all changes in location cache. Add locations into linemap and patch
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trees. */
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bool
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lto_location_cache::apply_location_cache ()
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{
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static const char *prev_file;
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if (!loc_cache.length ())
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return false;
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if (loc_cache.length () > 1)
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loc_cache.qsort (cmp_loc);
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for (unsigned int i = 0; i < loc_cache.length (); i++)
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{
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struct cached_location loc = loc_cache[i];
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if (current_file != loc.file)
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linemap_add (line_table, prev_file ? LC_RENAME : LC_ENTER,
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false, loc.file, loc.line);
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else if (current_line != loc.line)
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{
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int max = loc.col;
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for (unsigned int j = i + 1; j < loc_cache.length (); j++)
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if (loc.file != loc_cache[j].file
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|| loc.line != loc_cache[j].line)
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break;
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else if (max < loc_cache[j].col)
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max = loc_cache[j].col;
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linemap_line_start (line_table, loc.line, max + 1);
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}
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gcc_assert (*loc.loc == BUILTINS_LOCATION + 1);
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if (current_file == loc.file && current_line == loc.line
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&& current_col == loc.col)
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*loc.loc = current_loc;
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else
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current_loc = *loc.loc = linemap_position_for_column (line_table,
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loc.col);
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current_line = loc.line;
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prev_file = current_file = loc.file;
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current_col = loc.col;
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}
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loc_cache.truncate (0);
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accepted_length = 0;
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return true;
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}
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/* Tree merging did not suceed; mark all changes in the cache as accepted. */
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void
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lto_location_cache::accept_location_cache ()
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{
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gcc_assert (current_cache == this);
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accepted_length = loc_cache.length ();
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}
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/* Tree merging did suceed; throw away recent changes. */
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void
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lto_location_cache::revert_location_cache ()
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{
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loc_cache.truncate (accepted_length);
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}
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/* Read a location bitpack from input block IB and either update *LOC directly
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or add it to the location cache.
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It is neccesary to call apply_location_cache to get *LOC updated. */
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void
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lto_location_cache::input_location (location_t *loc, struct bitpack_d *bp,
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struct data_in *data_in)
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{
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static const char *stream_file;
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static int stream_line;
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static int stream_col;
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bool file_change, line_change, column_change;
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bool prev_file = current_file != NULL;
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gcc_assert (current_cache == this);
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if (bp_unpack_value (bp, 1))
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return UNKNOWN_LOCATION;
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{
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*loc = UNKNOWN_LOCATION;
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return;
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}
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*loc = BUILTINS_LOCATION + 1;
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file_change = bp_unpack_value (bp, 1);
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line_change = bp_unpack_value (bp, 1);
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column_change = bp_unpack_value (bp, 1);
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if (file_change)
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current_file = canon_file_name (bp_unpack_string (data_in, bp));
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stream_file = canon_file_name (bp_unpack_string (data_in, bp));
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if (line_change)
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current_line = bp_unpack_var_len_unsigned (bp);
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stream_line = bp_unpack_var_len_unsigned (bp);
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if (column_change)
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current_col = bp_unpack_var_len_unsigned (bp);
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stream_col = bp_unpack_var_len_unsigned (bp);
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if (file_change)
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/* This optimization saves location cache operations druing gimple
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streaming. */
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if (current_file == stream_file && current_line == stream_line
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&& current_col == stream_col)
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{
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if (prev_file)
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linemap_add (line_table, LC_LEAVE, false, NULL, 0);
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linemap_add (line_table, LC_ENTER, false, current_file, current_line);
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*loc = current_loc;
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return;
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}
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else if (line_change)
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linemap_line_start (line_table, current_line, current_col);
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return linemap_position_for_column (line_table, current_col);
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struct cached_location entry = {stream_file, loc, stream_line, stream_col};
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loc_cache.safe_push (entry);
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}
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/* Read a location bitpack from input block IB and either update *LOC directly
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or add it to the location cache.
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It is neccesary to call apply_location_cache to get *LOC updated. */
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void
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lto_input_location (location_t *loc, struct bitpack_d *bp,
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struct data_in *data_in)
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{
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data_in->location_cache.input_location (loc, bp, data_in);
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}
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/* Read location and return it instead of going through location caching.
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This should be used only when the resulting location is not going to be
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discarded. */
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location_t
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stream_input_location_now (struct bitpack_d *bp, struct data_in *data_in)
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{
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location_t loc;
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stream_input_location (&loc, bp, data_in);
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data_in->location_cache.apply_location_cache ();
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return loc;
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}
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/* Read a reference to a tree node from DATA_IN using input block IB.
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TAG is the expected node that should be found in IB, if TAG belongs
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r->u.must_not_throw.failure_decl = stream_read_tree (ib, data_in);
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bitpack_d bp = streamer_read_bitpack (ib);
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r->u.must_not_throw.failure_loc
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= stream_input_location (&bp, data_in);
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= stream_input_location_now (&bp, data_in);
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}
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break;
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@ -927,8 +1054,8 @@ input_struct_function_base (struct function *fn, struct data_in *data_in,
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fn->last_clique = bp_unpack_value (&bp, sizeof (short) * 8);
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/* Input the function start and end loci. */
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fn->function_start_locus = stream_input_location (&bp, data_in);
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fn->function_end_locus = stream_input_location (&bp, data_in);
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fn->function_start_locus = stream_input_location_now (&bp, data_in);
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fn->function_end_locus = stream_input_location_now (&bp, data_in);
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}
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@ -1126,6 +1253,7 @@ lto_read_body_or_constructor (struct lto_file_decl_data *file_data, struct symta
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}
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else
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input_constructor (fn_decl, data_in, &ib_main);
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data_in->location_cache.apply_location_cache ();
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/* And fixup types we streamed locally. */
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{
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struct streamer_tree_cache_d *cache = data_in->reader_cache;
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@ -1543,7 +1671,7 @@ lto_data_in_create (struct lto_file_decl_data *file_data, const char *strings,
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unsigned len,
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vec<ld_plugin_symbol_resolution_t> resolutions)
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{
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struct data_in *data_in = XCNEW (struct data_in);
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struct data_in *data_in = new (struct data_in);
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data_in->file_data = file_data;
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data_in->strings = strings;
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data_in->strings_len = len;
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{
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data_in->globals_resolution.release ();
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streamer_tree_cache_delete (data_in->reader_cache);
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free (data_in);
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delete data_in;
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}
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@ -307,6 +307,71 @@ typedef void (lto_free_section_data_f) (struct lto_file_decl_data *,
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const char *,
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size_t);
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/* The location cache holds expanded locations for streamed in trees.
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This is done to reduce memory usage of libcpp linemap that strongly preffers
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locations to be inserted in the soruce order. */
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class lto_location_cache
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{
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public:
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/* Apply all changes in location cache. Add locations into linemap and patch
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trees. */
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bool apply_location_cache ();
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/* Tree merging did not suceed; mark all changes in the cache as accepted. */
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void accept_location_cache ();
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/* Tree merging did suceed; throw away recent changes. */
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void revert_location_cache ();
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void input_location (location_t *loc, struct bitpack_d *bp,
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struct data_in *data_in);
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lto_location_cache ()
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: loc_cache (), accepted_length (0), current_file (NULL), current_line (0),
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current_col (0), current_loc (UNKNOWN_LOCATION)
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{
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gcc_assert (!current_cache);
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current_cache = this;
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}
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~lto_location_cache ()
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{
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apply_location_cache ();
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gcc_assert (current_cache == this);
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current_cache = NULL;
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}
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/* There can be at most one instance of location cache (combining multiple
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would bring it out of sync with libcpp linemap); point to current
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one. */
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static lto_location_cache *current_cache;
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private:
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static int cmp_loc (const void *pa, const void *pb);
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struct cached_location
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{
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const char *file;
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location_t *loc;
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int line, col;
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};
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/* The location cache. */
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vec<cached_location> loc_cache;
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/* Accepted entries are ones used by trees that are known to be not unified
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by tree merging. */
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int accepted_length;
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/* Bookkeeping to remember state in between calls to lto_apply_location_cache
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When streaming gimple, the location cache is not used and thus
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lto_apply_location_cache happens per location basis. It is then
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useful to avoid redundant calls of linemap API. */
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const char *current_file;
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int current_line;
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int current_col;
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location_t current_loc;
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};
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/* Structure used as buffer for reading an LTO file. */
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class lto_input_block
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{
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/* Cache of pickled nodes. */
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struct streamer_tree_cache_d *reader_cache;
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/* Cache of source code location. */
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lto_location_cache location_cache;
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};
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@ -788,7 +856,9 @@ extern struct data_in *lto_data_in_create (struct lto_file_decl_data *,
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vec<ld_plugin_symbol_resolution_t> );
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extern void lto_data_in_delete (struct data_in *);
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extern void lto_input_data_block (struct lto_input_block *, void *, size_t);
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location_t lto_input_location (struct bitpack_d *, struct data_in *);
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void lto_input_location (location_t *, struct bitpack_d *, struct data_in *);
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location_t stream_input_location_now (struct bitpack_d *bp,
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struct data_in *data);
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tree lto_input_tree_ref (struct lto_input_block *, struct data_in *,
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struct function *, enum LTO_tags);
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void lto_tag_check_set (enum LTO_tags, int, ...);
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@ -1,3 +1,11 @@
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2015-03-26 Jan Hubicka <hubicka@ucw.cz>
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PR lto/65536
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* lto.c (unify_scc): Revert location cache when unification
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suceeded.
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(lto_read_decls): Accept location cache after sucess;
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apply location cache before calling debug hooks.
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2015-03-10 Jan Hubicka <hubicka@ucw.cz>
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* lto.c (read_cgraph_and_symbols): Do not do merging
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@ -1734,10 +1734,11 @@ cmp_tree (const void *p1_, const void *p2_)
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that was successful, otherwise return false. */
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static bool
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unify_scc (struct streamer_tree_cache_d *cache, unsigned from,
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unify_scc (struct data_in *data_in, unsigned from,
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unsigned len, unsigned scc_entry_len, hashval_t scc_hash)
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{
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bool unified_p = false;
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struct streamer_tree_cache_d *cache = data_in->reader_cache;
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tree_scc *scc
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= (tree_scc *) alloca (sizeof (tree_scc) + (len - 1) * sizeof (tree));
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scc->next = NULL;
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@ -1827,6 +1828,7 @@ unify_scc (struct streamer_tree_cache_d *cache, unsigned from,
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}
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/* Free the tree nodes from the read SCC. */
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data_in->location_cache.revert_location_cache ();
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for (unsigned i = 0; i < len; ++i)
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{
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enum tree_code code;
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@ -1920,10 +1922,14 @@ lto_read_decls (struct lto_file_decl_data *decl_data, const void *data,
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/* Try to unify the SCC with already existing ones. */
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if (!flag_ltrans
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&& unify_scc (data_in->reader_cache, from,
|
||||
&& unify_scc (data_in, from,
|
||||
len, scc_entry_len, scc_hash))
|
||||
continue;
|
||||
|
||||
/* Tree merging failed, mark entries in location cache as
|
||||
permanent. */
|
||||
data_in->location_cache.accept_location_cache ();
|
||||
|
||||
bool seen_type = false;
|
||||
for (unsigned i = 0; i < len; ++i)
|
||||
{
|
||||
|
@ -1953,7 +1959,13 @@ lto_read_decls (struct lto_file_decl_data *decl_data, const void *data,
|
|||
/* Register TYPE_DECLs with the debuginfo machinery. */
|
||||
if (!flag_wpa
|
||||
&& TREE_CODE (t) == TYPE_DECL)
|
||||
debug_hooks->type_decl (t, !DECL_FILE_SCOPE_P (t));
|
||||
{
|
||||
/* Dwarf2out needs location information.
|
||||
TODO: Moving this out of the streamer loop may noticealy
|
||||
improve ltrans linemap memory use. */
|
||||
data_in->location_cache.apply_location_cache ();
|
||||
debug_hooks->type_decl (t, !DECL_FILE_SCOPE_P (t));
|
||||
}
|
||||
if (!flag_ltrans)
|
||||
{
|
||||
/* Register variables and functions with the
|
||||
|
@ -1979,6 +1991,7 @@ lto_read_decls (struct lto_file_decl_data *decl_data, const void *data,
|
|||
gcc_assert (t && data_in->reader_cache->nodes.length () == from);
|
||||
}
|
||||
}
|
||||
data_in->location_cache.apply_location_cache ();
|
||||
|
||||
/* Read in lto_in_decl_state objects. */
|
||||
data_ptr = (const uint32_t *) ((const char*) data + decl_offset);
|
||||
|
|
|
@ -52,7 +52,7 @@ struct streamer_hooks {
|
|||
tree (*read_tree) (struct lto_input_block *, struct data_in *);
|
||||
|
||||
/* [REQ] Called by every streaming routine that needs to read a location. */
|
||||
location_t (*input_location) (struct bitpack_d *, struct data_in *);
|
||||
void (*input_location) (location_t *, struct bitpack_d *, struct data_in *);
|
||||
|
||||
/* [REQ] Called by every streaming routine that needs to write a location. */
|
||||
void (*output_location) (struct output_block *, struct bitpack_d *, location_t);
|
||||
|
@ -67,8 +67,8 @@ struct streamer_hooks {
|
|||
#define stream_read_tree(IB, DATA_IN) \
|
||||
streamer_hooks.read_tree (IB, DATA_IN)
|
||||
|
||||
#define stream_input_location(BP, DATA_IN) \
|
||||
streamer_hooks.input_location (BP, DATA_IN)
|
||||
#define stream_input_location(LOCPTR, BP, DATA_IN) \
|
||||
streamer_hooks.input_location (LOCPTR, BP, DATA_IN)
|
||||
|
||||
#define stream_output_location(OB, BP, LOC) \
|
||||
streamer_hooks.output_location (OB, BP, LOC)
|
||||
|
|
|
@ -411,7 +411,7 @@ unpack_ts_block_value_fields (struct data_in *data_in,
|
|||
{
|
||||
BLOCK_ABSTRACT (expr) = (unsigned) bp_unpack_value (bp, 1);
|
||||
/* BLOCK_NUMBER is recomputed. */
|
||||
BLOCK_SOURCE_LOCATION (expr) = stream_input_location (bp, data_in);
|
||||
stream_input_location (&BLOCK_SOURCE_LOCATION (expr), bp, data_in);
|
||||
}
|
||||
|
||||
/* Unpack all the non-pointer fields of the TS_TRANSLATION_UNIT_DECL
|
||||
|
@ -433,7 +433,7 @@ static void
|
|||
unpack_ts_omp_clause_value_fields (struct data_in *data_in,
|
||||
struct bitpack_d *bp, tree expr)
|
||||
{
|
||||
OMP_CLAUSE_LOCATION (expr) = stream_input_location (bp, data_in);
|
||||
stream_input_location (&OMP_CLAUSE_LOCATION (expr), bp, data_in);
|
||||
switch (OMP_CLAUSE_CODE (expr))
|
||||
{
|
||||
case OMP_CLAUSE_DEFAULT:
|
||||
|
@ -503,7 +503,7 @@ streamer_read_tree_bitfields (struct lto_input_block *ib,
|
|||
unpack_ts_fixed_cst_value_fields (&bp, expr);
|
||||
|
||||
if (CODE_CONTAINS_STRUCT (code, TS_DECL_MINIMAL))
|
||||
DECL_SOURCE_LOCATION (expr) = stream_input_location (&bp, data_in);
|
||||
stream_input_location (&DECL_SOURCE_LOCATION (expr), &bp, data_in);
|
||||
|
||||
if (CODE_CONTAINS_STRUCT (code, TS_DECL_COMMON))
|
||||
unpack_ts_decl_common_value_fields (&bp, expr);
|
||||
|
@ -522,7 +522,7 @@ streamer_read_tree_bitfields (struct lto_input_block *ib,
|
|||
|
||||
if (CODE_CONTAINS_STRUCT (code, TS_EXP))
|
||||
{
|
||||
SET_EXPR_LOCATION (expr, stream_input_location (&bp, data_in));
|
||||
stream_input_location (&EXPR_CHECK (expr)->exp.locus, &bp, data_in);
|
||||
if (code == MEM_REF
|
||||
|| code == TARGET_MEM_REF)
|
||||
{
|
||||
|
@ -905,11 +905,20 @@ lto_input_ts_exp_tree_pointers (struct lto_input_block *ib,
|
|||
struct data_in *data_in, tree expr)
|
||||
{
|
||||
int i;
|
||||
tree block;
|
||||
|
||||
for (i = 0; i < TREE_OPERAND_LENGTH (expr); i++)
|
||||
TREE_OPERAND (expr, i) = stream_read_tree (ib, data_in);
|
||||
|
||||
TREE_SET_BLOCK (expr, stream_read_tree (ib, data_in));
|
||||
block = stream_read_tree (ib, data_in);
|
||||
|
||||
/* TODO: Block is stored in the locus information. It may make more sense to
|
||||
to make it go via the location cache. */
|
||||
if (block)
|
||||
{
|
||||
data_in->location_cache.apply_location_cache ();
|
||||
TREE_SET_BLOCK (expr, block);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
|
|
Loading…
Add table
Reference in a new issue