mirror of git://gcc.gnu.org/git/gcc.git
libcpp/input.c: Add a way to visualize the linemaps (-fdump-internal-locations)
gcc/ChangeLog: * common.opt (fdump-internal-locations): New option. * input.c: Include diagnostic-core.h. (get_end_location): New function. (write_digit): New function. (write_digit_row): New function. (dump_location_range): New function. (dump_labelled_location_range): New function. (dump_location_info): New function. * input.h (dump_location_info): New prototype. * toplev.c (compile_file): Handle flag_dump_locations. libcpp/ChangeLog: * include/line-map.h (source_location): Add a reference to location-example.txt to the descriptive comment. * location-example.txt: New file. From-SVN: r223163
This commit is contained in:
David Malcolm
David Malcolm
parent
49d50b6b8f
commit
ba4ad400f1
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@ -1,3 +1,16 @@
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2015-05-13 David Malcolm <dmalcolm@redhat.com>
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* common.opt (fdump-internal-locations): New option.
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* input.c: Include diagnostic-core.h.
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(get_end_location): New function.
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(write_digit): New function.
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(write_digit_row): New function.
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(dump_location_range): New function.
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(dump_labelled_location_range): New function.
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(dump_location_info): New function.
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* input.h (dump_location_info): New prototype.
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* toplev.c (compile_file): Handle flag_dump_locations.
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2015-05-13 Eric Botcazou <ebotcazou@adacore.com>
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2015-05-13 Eric Botcazou <ebotcazou@adacore.com>
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* gimple-expr.h (is_gimple_constant): Reorder.
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* gimple-expr.h (is_gimple_constant): Reorder.
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@ -1166,6 +1166,10 @@ Common Driver Var(flag_report_bug)
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Collect and dump debug information into temporary file if ICE in C/C++
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Collect and dump debug information into temporary file if ICE in C/C++
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compiler occured.
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compiler occured.
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fdump-internal-locations
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Common Var(flag_dump_locations) Init(0)
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Dump detailed information on GCC's internal representation of source code locations
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fdump-passes
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fdump-passes
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Common Var(flag_dump_passes) Init(0)
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Common Var(flag_dump_passes) Init(0)
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Dump optimization passes
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Dump optimization passes
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224
gcc/input.c
224
gcc/input.c
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@ -23,6 +23,7 @@ along with GCC; see the file COPYING3. If not see
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#include "intl.h"
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#include "intl.h"
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#include "input.h"
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#include "input.h"
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#include "vec.h"
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#include "vec.h"
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#include "diagnostic-core.h"
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/* This is a cache used by get_next_line to store the content of a
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/* This is a cache used by get_next_line to store the content of a
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file to be searched for file lines. */
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file to be searched for file lines. */
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@ -869,3 +870,226 @@ dump_line_table_statistics (void)
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STAT_LABEL (total_used_map_size));
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STAT_LABEL (total_used_map_size));
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fprintf (stderr, "\n");
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fprintf (stderr, "\n");
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}
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}
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/* Get location one beyond the final location in ordinary map IDX. */
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static source_location
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get_end_location (struct line_maps *set, unsigned int idx)
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{
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if (idx == LINEMAPS_ORDINARY_USED (set) - 1)
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return set->highest_location;
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struct line_map *next_map = LINEMAPS_ORDINARY_MAP_AT (set, idx + 1);
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return MAP_START_LOCATION (next_map);
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}
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/* Helper function for write_digit_row. */
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static void
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write_digit (FILE *stream, int digit)
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{
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fputc ('0' + (digit % 10), stream);
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}
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/* Helper function for dump_location_info.
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Write a row of numbers to STREAM, numbering a source line,
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giving the units, tens, hundreds etc of the column number. */
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static void
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write_digit_row (FILE *stream, int indent,
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source_location loc, int max_col, int divisor)
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{
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fprintf (stream, "%*c", indent, ' ');
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fprintf (stream, "|");
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for (int column = 1; column < max_col; column++)
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{
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source_location column_loc = loc + column;
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write_digit (stream, column_loc / divisor);
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}
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fprintf (stream, "\n");
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}
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/* Write a half-closed (START) / half-open (END) interval of
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source_location to STREAM. */
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static void
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dump_location_range (FILE *stream,
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source_location start, source_location end)
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{
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fprintf (stream,
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" source_location interval: %u <= loc < %u\n",
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start, end);
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}
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/* Write a labelled description of a half-closed (START) / half-open (END)
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interval of source_location to STREAM. */
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static void
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dump_labelled_location_range (FILE *stream,
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const char *name,
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source_location start, source_location end)
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{
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fprintf (stream, "%s\n", name);
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dump_location_range (stream, start, end);
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fprintf (stream, "\n");
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}
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/* Write a visualization of the locations in the line_table to STREAM. */
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void
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dump_location_info (FILE *stream)
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{
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/* Visualize the reserved locations. */
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dump_labelled_location_range (stream, "RESERVED LOCATIONS",
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0, RESERVED_LOCATION_COUNT);
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/* Visualize the ordinary line_map instances, rendering the sources. */
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for (unsigned int idx = 0; idx < LINEMAPS_ORDINARY_USED (line_table); idx++)
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{
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source_location end_location = get_end_location (line_table, idx);
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/* half-closed: doesn't include this one. */
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struct line_map *map = LINEMAPS_ORDINARY_MAP_AT (line_table, idx);
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fprintf (stream, "ORDINARY MAP: %i\n", idx);
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dump_location_range (stream,
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MAP_START_LOCATION (map), end_location);
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fprintf (stream, " file: %s\n", ORDINARY_MAP_FILE_NAME (map));
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fprintf (stream, " starting at line: %i\n",
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ORDINARY_MAP_STARTING_LINE_NUMBER (map));
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fprintf (stream, " column bits: %i\n",
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ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map));
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/* Render the span of source lines that this "map" covers. */
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for (source_location loc = MAP_START_LOCATION (map);
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loc < end_location;
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loc++)
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{
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expanded_location exploc
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= linemap_expand_location (line_table, map, loc);
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if (0 == exploc.column)
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{
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/* Beginning of a new source line: draw the line. */
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int line_size;
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const char *line_text = location_get_source_line (exploc, &line_size);
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if (!line_text)
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break;
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fprintf (stream,
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"%s:%3i|loc:%5i|%.*s\n",
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exploc.file, exploc.line,
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loc,
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line_size, line_text);
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/* "loc" is at column 0, which means "the whole line".
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Render the locations *within* the line, by underlining
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it, showing the source_location numeric values
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at each column. */
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int max_col
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= (1 << ORDINARY_MAP_NUMBER_OF_COLUMN_BITS (map)) - 1;
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if (max_col > line_size)
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max_col = line_size + 1;
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int indent = 14 + strlen (exploc.file);
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/* Thousands. */
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if (end_location > 999)
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write_digit_row (stream, indent, loc, max_col, 1000);
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/* Hundreds. */
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if (end_location > 99)
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write_digit_row (stream, indent, loc, max_col, 100);
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/* Tens. */
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write_digit_row (stream, indent, loc, max_col, 10);
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/* Units. */
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write_digit_row (stream, indent, loc, max_col, 1);
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}
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}
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fprintf (stream, "\n");
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}
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/* Visualize unallocated values. */
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dump_labelled_location_range (stream, "UNALLOCATED LOCATIONS",
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line_table->highest_location,
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LINEMAPS_MACRO_LOWEST_LOCATION (line_table));
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/* Visualize the macro line_map instances, rendering the sources. */
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for (unsigned int i = 0; i < LINEMAPS_MACRO_USED (line_table); i++)
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{
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/* Each macro map that is allocated owns source_location values
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that are *lower* that the one before them.
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Hence it's meaningful to view them either in order of ascending
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source locations, or in order of ascending macro map index. */
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const bool ascending_source_locations = true;
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unsigned int idx = (ascending_source_locations
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? (LINEMAPS_MACRO_USED (line_table) - (i + 1))
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: i);
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struct line_map *map = LINEMAPS_MACRO_MAP_AT (line_table, idx);
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fprintf (stream, "MACRO %i: %s (%u tokens)\n",
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idx,
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linemap_map_get_macro_name (map),
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MACRO_MAP_NUM_MACRO_TOKENS (map));
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dump_location_range (stream,
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map->start_location,
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(map->start_location
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+ MACRO_MAP_NUM_MACRO_TOKENS (map)));
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inform (MACRO_MAP_EXPANSION_POINT_LOCATION (map),
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"expansion point is location %i",
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MACRO_MAP_EXPANSION_POINT_LOCATION (map));
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fprintf (stream, " map->start_location: %u\n",
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map->start_location);
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fprintf (stream, " macro_locations:\n");
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for (unsigned int i = 0; i < MACRO_MAP_NUM_MACRO_TOKENS (map); i++)
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{
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source_location x = MACRO_MAP_LOCATIONS (map)[2 * i];
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source_location y = MACRO_MAP_LOCATIONS (map)[(2 * i) + 1];
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/* linemap_add_macro_token encodes token numbers in an expansion
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by putting them after MAP_START_LOCATION. */
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/* I'm typically seeing 4 uninitialized entries at the end of
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0xafafafaf.
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This appears to be due to macro.c:replace_args
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adding 2 extra args for padding tokens; presumably there may
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be a leading and/or trailing padding token injected,
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each for 2 more location slots.
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This would explain there being up to 4 source_locations slots
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that may be uninitialized. */
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fprintf (stream, " %u: %u, %u\n",
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i,
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x,
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y);
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if (x == y)
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{
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if (x < MAP_START_LOCATION (map))
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inform (x, "token %u has x-location == y-location == %u", i, x);
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else
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fprintf (stream,
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"x-location == y-location == %u encodes token # %u\n",
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x, x - MAP_START_LOCATION (map));
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}
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else
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{
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inform (x, "token %u has x-location == %u", i, x);
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inform (x, "token %u has y-location == %u", i, y);
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}
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}
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fprintf (stream, "\n");
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}
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/* It appears that MAX_SOURCE_LOCATION itself is never assigned to a
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macro map, presumably due to an off-by-one error somewhere
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between the logic in linemap_enter_macro and
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LINEMAPS_MACRO_LOWEST_LOCATION. */
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dump_labelled_location_range (stream, "MAX_SOURCE_LOCATION",
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MAX_SOURCE_LOCATION,
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MAX_SOURCE_LOCATION + 1);
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/* Visualize ad-hoc values. */
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dump_labelled_location_range (stream, "AD-HOC LOCATIONS",
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MAX_SOURCE_LOCATION + 1, UINT_MAX);
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}
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@ -77,6 +77,8 @@ extern location_t input_location;
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void dump_line_table_statistics (void);
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void dump_line_table_statistics (void);
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void dump_location_info (FILE *stream);
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void diagnostics_file_cache_fini (void);
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void diagnostics_file_cache_fini (void);
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#endif
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#endif
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@ -593,6 +593,9 @@ compile_file (void)
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timevar_pop (TV_PARSE_GLOBAL);
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timevar_pop (TV_PARSE_GLOBAL);
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timevar_stop (TV_PHASE_PARSING);
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timevar_stop (TV_PHASE_PARSING);
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if (flag_dump_locations)
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dump_location_info (stderr);
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/* Compilation is now finished except for writing
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/* Compilation is now finished except for writing
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what's left of the symbol table output. */
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what's left of the symbol table output. */
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@ -1,3 +1,9 @@
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2015-05-13 David Malcolm <dmalcolm@redhat.com>
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* include/line-map.h (source_location): Add a reference to
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location-example.txt to the descriptive comment.
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* location-example.txt: New file.
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2015-05-13 David Malcolm <dmalcolm@redhat.com>
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2015-05-13 David Malcolm <dmalcolm@redhat.com>
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* include/line-map.h (MAX_SOURCE_LOCATION): Convert from a macro
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* include/line-map.h (MAX_SOURCE_LOCATION): Convert from a macro
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@ -113,7 +113,9 @@ typedef unsigned int linenum_type;
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... | |
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... | |
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0xffffffff | UINT_MAX |
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0xffffffff | UINT_MAX |
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-----------+-------------------------------+-------------------------------
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-----------+-------------------------------+-------------------------------
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. */
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To see how this works in practice, see the worked example in
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libcpp/location-example.txt. */
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typedef unsigned int source_location;
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typedef unsigned int source_location;
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/* Memory allocation function typedef. Works like xrealloc. */
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/* Memory allocation function typedef. Works like xrealloc. */
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@ -0,0 +1,216 @@
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Consider compiling test.c, with this content:
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VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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#include "test.h"
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int
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main (int argc, char **argv)
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{
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int a = PLUS (1,2);
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int b = PLUS (3,4);
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return 0;
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}
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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...where test.h has this content:
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VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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extern int foo ();
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#define PLUS(A, B) A + B
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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The undocumented -fdump-internal-locations option outputs this information
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to stderr, showing what each source_location value means. Source code
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lines are quoted, showing both per-line source_location values and
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per-line&column source_location values (written vertically under the
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corresponding character of source code).
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VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV
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RESERVED LOCATIONS
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source_location interval: 0 <= loc < 2
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ORDINARY MAP: 0
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source_location interval: 2 <= loc < 3
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file: test.c
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starting at line: 1
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column bits: 7
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test.c: 1|loc: 2|#include "test.h"
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|00000001111111111
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|34567890123456789
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|
ORDINARY MAP: 1
|
||||||
|
source_location interval: 3 <= loc < 4
|
||||||
|
file: <built-in>
|
||||||
|
starting at line: 0
|
||||||
|
column bits: 0
|
||||||
|
|
||||||
|
ORDINARY MAP: 2
|
||||||
|
source_location interval: 4 <= loc < 5
|
||||||
|
file: <command-line>
|
||||||
|
starting at line: 0
|
||||||
|
column bits: 0
|
||||||
|
|
||||||
|
ORDINARY MAP: 3
|
||||||
|
source_location interval: 5 <= loc < 5005
|
||||||
|
file: /usr/include/stdc-predef.h
|
||||||
|
starting at line: 1
|
||||||
|
column bits: 7
|
||||||
|
(contents of /usr/include/stdc-predef.h snipped for brevity)
|
||||||
|
|
||||||
|
ORDINARY MAP: 4
|
||||||
|
source_location interval: 5005 <= loc < 5006
|
||||||
|
file: <command-line>
|
||||||
|
starting at line: 1
|
||||||
|
column bits: 7
|
||||||
|
|
||||||
|
ORDINARY MAP: 5
|
||||||
|
source_location interval: 5006 <= loc < 5134
|
||||||
|
file: test.c
|
||||||
|
starting at line: 1
|
||||||
|
column bits: 7
|
||||||
|
test.c: 1|loc: 5006|#include "test.h"
|
||||||
|
|55555555555555555
|
||||||
|
|00000000000000000
|
||||||
|
|00011111111112222
|
||||||
|
|78901234567890123
|
||||||
|
|
||||||
|
ORDINARY MAP: 6
|
||||||
|
source_location interval: 5134 <= loc < 5416
|
||||||
|
file: test.h
|
||||||
|
starting at line: 1
|
||||||
|
column bits: 7
|
||||||
|
test.h: 1|loc: 5134|extern int foo ();
|
||||||
|
|555555555555555555
|
||||||
|
|111111111111111111
|
||||||
|
|333334444444444555
|
||||||
|
|567890123456789012
|
||||||
|
test.h: 2|loc: 5262|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
test.h: 3|loc: 5390|#define PLUS(A, B) A + B
|
||||||
|
|555555555555555555555555
|
||||||
|
|333333333444444444444444
|
||||||
|
|999999999000000000011111
|
||||||
|
|123456789012345678901234
|
||||||
|
|
||||||
|
ORDINARY MAP: 7
|
||||||
|
source_location interval: 5416 <= loc < 6314
|
||||||
|
file: test.c
|
||||||
|
starting at line: 2
|
||||||
|
column bits: 7
|
||||||
|
test.c: 2|loc: 5416|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
|
|
||||||
|
test.c: 3|loc: 5544|int
|
||||||
|
|555
|
||||||
|
|555
|
||||||
|
|444
|
||||||
|
|567
|
||||||
|
test.c: 4|loc: 5672|main (int argc, char **argv)
|
||||||
|
|5555555555555555555555555555
|
||||||
|
|6666666666666666666666666667
|
||||||
|
|7777777888888888899999999990
|
||||||
|
|3456789012345678901234567890
|
||||||
|
test.c: 5|loc: 5800|{
|
||||||
|
|5
|
||||||
|
|8
|
||||||
|
|0
|
||||||
|
|1
|
||||||
|
test.c: 6|loc: 5928| int a = PLUS (1,2);
|
||||||
|
|555555555555555555555
|
||||||
|
|999999999999999999999
|
||||||
|
|233333333334444444444
|
||||||
|
|901234567890123456789
|
||||||
|
test.c: 7|loc: 6056| int b = PLUS (3,4);
|
||||||
|
|666666666666666666666
|
||||||
|
|000000000000000000000
|
||||||
|
|555666666666677777777
|
||||||
|
|789012345678901234567
|
||||||
|
test.c: 8|loc: 6184| return 0;
|
||||||
|
|66666666666
|
||||||
|
|11111111111
|
||||||
|
|88888999999
|
||||||
|
|56789012345
|
||||||
|
test.c: 9|loc: 6312|}
|
||||||
|
|6
|
||||||
|
|3
|
||||||
|
|1
|
||||||
|
|3
|
||||||
|
|
||||||
|
UNALLOCATED LOCATIONS
|
||||||
|
source_location interval: 6314 <= loc < 2147483633
|
||||||
|
|
||||||
|
MACRO 1: PLUS (7 tokens)
|
||||||
|
source_location interval: 2147483633 <= loc < 2147483640
|
||||||
|
test.c:7:11: note: expansion point is location 6067
|
||||||
|
int b = PLUS (3,4);
|
||||||
|
^
|
||||||
|
map->start_location: 2147483633
|
||||||
|
macro_locations:
|
||||||
|
0: 6073, 5410
|
||||||
|
test.c:7:17: note: token 0 has x-location == 6073
|
||||||
|
int b = PLUS (3,4);
|
||||||
|
^
|
||||||
|
test.c:7:17: note: token 0 has y-location == 5410
|
||||||
|
1: 5412, 5412
|
||||||
|
In file included from test.c:1:0:
|
||||||
|
test.h:3:22: note: token 1 has x-location == y-location == 5412
|
||||||
|
#define PLUS(A, B) A + B
|
||||||
|
^
|
||||||
|
2: 6075, 5414
|
||||||
|
test.c:7:19: note: token 2 has x-location == 6075
|
||||||
|
int b = PLUS (3,4);
|
||||||
|
^
|
||||||
|
test.c:7:19: note: token 2 has y-location == 5414
|
||||||
|
3: 0, 2947526575
|
||||||
|
cc1: note: token 3 has x-location == 0
|
||||||
|
cc1: note: token 3 has y-location == 2947526575
|
||||||
|
4: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042942
|
||||||
|
5: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042942
|
||||||
|
6: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042942
|
||||||
|
|
||||||
|
MACRO 0: PLUS (7 tokens)
|
||||||
|
source_location interval: 2147483640 <= loc < 2147483647
|
||||||
|
test.c:6:11: note: expansion point is location 5939
|
||||||
|
int a = PLUS (1,2);
|
||||||
|
^
|
||||||
|
map->start_location: 2147483640
|
||||||
|
macro_locations:
|
||||||
|
0: 5945, 5410
|
||||||
|
test.c:6:17: note: token 0 has x-location == 5945
|
||||||
|
int a = PLUS (1,2);
|
||||||
|
^
|
||||||
|
test.c:6:17: note: token 0 has y-location == 5410
|
||||||
|
1: 5412, 5412
|
||||||
|
In file included from test.c:1:0:
|
||||||
|
test.h:3:22: note: token 1 has x-location == y-location == 5412
|
||||||
|
#define PLUS(A, B) A + B
|
||||||
|
^
|
||||||
|
2: 5947, 5414
|
||||||
|
test.c:6:19: note: token 2 has x-location == 5947
|
||||||
|
int a = PLUS (1,2);
|
||||||
|
^
|
||||||
|
test.c:6:19: note: token 2 has y-location == 5414
|
||||||
|
3: 0, 2947526575
|
||||||
|
cc1: note: token 3 has x-location == 0
|
||||||
|
cc1: note: token 3 has y-location == 2947526575
|
||||||
|
4: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042935
|
||||||
|
5: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042935
|
||||||
|
6: 2947526575, 2947526575
|
||||||
|
x-location == y-location == 2947526575 encodes token # 800042935
|
||||||
|
|
||||||
|
MAX_SOURCE_LOCATION
|
||||||
|
source_location interval: 2147483647 <= loc < 2147483648
|
||||||
|
|
||||||
|
AD-HOC LOCATIONS
|
||||||
|
source_location interval: 2147483648 <= loc < 4294967295
|
||||||
|
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||||
Loading…
Reference in New Issue