diff options
Diffstat (limited to 'gcc/input.c')
| -rw-r--r-- | gcc/input.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/gcc/input.c b/gcc/input.c index bf1ca66..c589d70 100644 --- a/gcc/input.c +++ b/gcc/input.c @@ -3557,6 +3557,34 @@ for_each_line_table_case (void (*testcase) (const line_table_case &)) ASSERT_EQ (num_cases_tested, 2 * 12); } +/* Verify that when presented with a consecutive pair of locations with + a very large line offset, we don't attempt to consolidate them into + a single ordinary linemap where the line offsets within the line map + would lead to overflow (PR lto/88147). */ + +static void +test_line_offset_overflow () +{ + line_table_test ltt (line_table_case (5, 0)); + + linemap_add (line_table, LC_ENTER, false, "foo.c", 0); + linemap_line_start (line_table, 1, 100); + location_t loc_a = linemap_line_start (line_table, 2578, 255); + assert_loceq ("foo.c", 2578, 0, loc_a); + + const line_map_ordinary *ordmap_a = LINEMAPS_LAST_ORDINARY_MAP (line_table); + ASSERT_EQ (ordmap_a->m_column_and_range_bits, 13); + ASSERT_EQ (ordmap_a->m_range_bits, 5); + + location_t loc_b = linemap_line_start (line_table, 404198, 512); + assert_loceq ("foo.c", 404198, 0, loc_b); + + /* We should have started a new linemap, rather than attempting to store + a very large line offset. */ + const line_map_ordinary *ordmap_b = LINEMAPS_LAST_ORDINARY_MAP (line_table); + ASSERT_NE (ordmap_a, ordmap_b); +} + /* Run all of the selftests within this file. */ void @@ -3596,6 +3624,8 @@ input_c_tests () for_each_line_table_case (test_lexer_char_constants); test_reading_source_line (); + + test_line_offset_overflow (); } } // namespace selftest |