From: Andi Kleen <a...@gcc.gnu.org> gcc/ChangeLog:
* input.cc (check_line): New. (test_replacement): New function to test line caching. (input_cc_tests): Call test_replacement --- gcc/input.cc | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/gcc/input.cc b/gcc/input.cc index f1a15de66f1..524d5d2b6d1 100644 --- a/gcc/input.cc +++ b/gcc/input.cc @@ -2346,6 +2346,51 @@ test_make_location_nonpure_range_endpoints (const line_table_case &case_) ASSERT_FALSE (IS_ADHOC_LOC (get_finish (not_aaa_eq_bbb))); } +/* Verify reading of a specific line LINENUM in TMP, FC. */ + +static void check_line (temp_source_file &tmp, file_cache &fc, int linenum) +{ + char_span line = fc.get_source_line (tmp.get_filename (), linenum); + int n; + ASSERT_TRUE (sscanf (line.get_buffer (), "%d", &n) == 1); + ASSERT_EQ (n, linenum); +} + +/* Test file cache replacement. */ + +static void test_replacement () +{ + const int maxline = 1000; + char *vec = XNEWVEC (char, maxline * 15); + char *p = vec; + int i; + for (i = 1; i <= maxline; i++) + { + p += sprintf (p, "%d\n", i); + } + temp_source_file tmp (SELFTEST_LOCATION, ".txt", vec); + free (vec); + file_cache fc; + + for (i = 2; i <= maxline; i++) + { + check_line (tmp, fc, i); + check_line (tmp, fc, i - 1); + if (i >= 10) + check_line (tmp, fc, i - 9); + if (i >= 350) /* Exceed the look behind cache. */ + check_line (tmp, fc, i - 300); + } + for (i = 5; i <= maxline; i += 100) + { + check_line (tmp, fc, i); + } + for (i = 1; i <= maxline; i++) + { + check_line (tmp, fc, i); + } +} + /* Verify reading of input files (e.g. for caret-based diagnostics). */ static void @@ -4296,6 +4341,7 @@ input_cc_tests () test_reading_source_line (); test_reading_source_buffer (); + test_replacement (); test_line_offset_overflow (); -- 2.47.1