From eca7a60bd24ebd91addd785e420a06d8f5086634 Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Sat, 6 Jun 2020 22:19:46 +0200 Subject: [PATCH] Fix ICE in ODR enum streaming [PR95548] gcc/ChangeLog: 2020-06-06 Jan Hubicka PR lto/95548 * ipa-devirt.c (struct odr_enum_val): Turn values to wide_int. (ipa_odr_summary_write): Update streaming. (ipa_odr_read_section): Update streaming. gcc/testsuite/ChangeLog: 2020-06-06 Jan Hubicka * g++.dg/torture/pr95548.C: New test. --- gcc/ipa-devirt.c | 59 +++++++++++++++++++++----- gcc/testsuite/g++.dg/torture/pr95548.C | 8 ++++ 2 files changed, 56 insertions(+), 11 deletions(-) create mode 100644 gcc/testsuite/g++.dg/torture/pr95548.C diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c index 8e36ff1ea1d..0340decba9b 100644 --- a/gcc/ipa-devirt.c +++ b/gcc/ipa-devirt.c @@ -505,7 +505,7 @@ static GTY(()) vec *odr_enums; struct odr_enum_val { const char *name; - HOST_WIDE_INT val; + wide_int val; location_t locus; }; @@ -4048,8 +4048,9 @@ ipa_odr_summary_write (void) streamer_write_string (ob, ob->main_stream, IDENTIFIER_POINTER (TREE_PURPOSE (e)), true); - streamer_write_hwi (ob, tree_to_shwi - (DECL_INITIAL (TREE_VALUE (e)))); + streamer_write_wide_int (ob, + wi::to_wide (DECL_INITIAL + (TREE_VALUE (e)))); } bitpack_d bp = bitpack_create (ob->main_stream); @@ -4080,7 +4081,7 @@ ipa_odr_summary_write (void) { streamer_write_string (ob, ob->main_stream, this_enum.vals[j].name, true); - streamer_write_hwi (ob, this_enum.vals[j].val); + streamer_write_wide_int (ob, this_enum.vals[j].val); } bitpack_d bp = bitpack_create (ob->main_stream); @@ -4139,35 +4140,51 @@ ipa_odr_read_section (struct lto_file_decl_data *file_data, const char *data, class odr_enum &this_enum = odr_enum_map->get_or_insert (xstrdup (name), &existed_p); + /* If this is first time we see the enum, remember its definition. */ if (!existed_p) { this_enum.vals.safe_grow_cleared (nvals); this_enum.warned = false; + if (dump_file) + fprintf (dump_file, "enum %s\n{\n", name); for (unsigned j = 0; j < nvals; j++) { const char *val_name = streamer_read_string (data_in, &ib); obstack_grow (&odr_enum_obstack, val_name, strlen (val_name) + 1); this_enum.vals[j].name = XOBFINISH (&odr_enum_obstack, char *); - this_enum.vals[j].val = streamer_read_hwi (&ib); + this_enum.vals[j].val = streamer_read_wide_int (&ib); + if (dump_file) + fprintf (dump_file, " %s = " HOST_WIDE_INT_PRINT_DEC ",\n", + val_name, wi::fits_shwi_p (this_enum.vals[j].val) + ? this_enum.vals[j].val.to_shwi () : -1); } bitpack_d bp = streamer_read_bitpack (&ib); stream_input_location (&this_enum.locus, &bp, data_in); for (unsigned j = 0; j < nvals; j++) stream_input_location (&this_enum.vals[j].locus, &bp, data_in); data_in->location_cache.apply_location_cache (); + if (dump_file) + fprintf (dump_file, "}\n"); } + /* If we already have definition, compare it with new one and output + warnings if they differs. */ else { int do_warning = -1; char *warn_name = NULL; - HOST_WIDE_INT warn_value = 0; + wide_int warn_value = wi::zero (1); + if (dump_file) + fprintf (dump_file, "Comparing enum %s\n", name); + + /* Look for differences which we will warn about later once locations + are streamed. */ for (unsigned j = 0; j < nvals; j++) { const char *id = streamer_read_string (data_in, &ib); - HOST_WIDE_INT val = streamer_read_hwi (&ib); + wide_int val = streamer_read_wide_int (&ib); - if (do_warning != -1 || j > this_enum.vals.length ()) + if (do_warning != -1 || j >= this_enum.vals.length ()) continue; if (strcmp (id, this_enum.vals[j].name) || val != this_enum.vals[j].val) @@ -4175,13 +4192,19 @@ ipa_odr_read_section (struct lto_file_decl_data *file_data, const char *data, warn_name = xstrdup (id); warn_value = val; do_warning = j; + if (dump_file) + fprintf (dump_file, " Different on entry %i\n", j); } } - bitpack_d bp = streamer_read_bitpack (&ib); + /* Stream in locations, but do not apply them unless we are going + to warn. */ + bitpack_d bp = streamer_read_bitpack (&ib); location_t locus; + stream_input_location (&locus, &bp, data_in); + /* Did we find a difference? */ if (do_warning != -1 || nvals != this_enum.vals.length ()) { data_in->location_cache.apply_location_cache (); @@ -4213,26 +4236,40 @@ ipa_odr_read_section (struct lto_file_decl_data *file_data, const char *data, } else data_in->location_cache.revert_location_cache (); + + /* Finally look up for location of the actual value that diverged. */ for (unsigned j = 0; j < nvals; j++) { location_t id_locus; data_in->location_cache.revert_location_cache (); stream_input_location (&id_locus, &bp, data_in); + if ((int) j == do_warning) { data_in->location_cache.apply_location_cache (); + if (strcmp (warn_name, this_enum.vals[j].name)) inform (this_enum.vals[j].locus, "name %qs differs from name %qs defined" " in another translation unit", this_enum.vals[j].name, warn_name); - else + /* FIXME: In case there is easy way to print wide_ints, + perhaps we could do it here instead of overlfow checpl. */ + else if (wi::fits_shwi_p (this_enum.vals[j].val) + && wi::fits_shwi_p (warn_value)) inform (this_enum.vals[j].locus, "name %qs is defined to " HOST_WIDE_INT_PRINT_DEC " while another translation unit defines " "it as " HOST_WIDE_INT_PRINT_DEC, - warn_name, this_enum.vals[j].val, warn_value); + warn_name, this_enum.vals[j].val.to_shwi (), + warn_value.to_shwi ()); + else + inform (this_enum.vals[j].locus, + "name %qs is defined to different value " + "in another translation unit", + warn_name); + inform (id_locus, "mismatching definition"); } diff --git a/gcc/testsuite/g++.dg/torture/pr95548.C b/gcc/testsuite/g++.dg/torture/pr95548.C new file mode 100644 index 00000000000..bca4f753f7e --- /dev/null +++ b/gcc/testsuite/g++.dg/torture/pr95548.C @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +enum a { b = (unsigned long)-1 } c; +#ifdef __SIZEOF_INT128__ +enum c { d = (unsigned long)-1 } e; +#endif +main() +{ +} -- 2.30.2