https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68638
Bug ID: 68638
Summary: [6 Regression] ICE in linemap_macro_map_lookup
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: preprocessor
Assignee: unassigned at gcc dot gnu.org
Reporter: msebor at gcc dot gnu.org
Target Milestone: ---
The following test case triggers an ICE in linemap_macro_map_lookup, at
libcpp/line-map.c:991 with yesterday's top of trunk. The test case compiles
fine with GCC 5.1 so this is a regression.
$ cat line-map-ice.c && /build/gcc-trunk-svn/gcc/xgcc -B
/build/gcc-trunk-svn/gcc -O2 -S -Wall -fno-diagnostics-show-caret
line-map-ice.c
typedef union tree_node *tree;
struct ht_identifier {
const unsigned char *str;
};
struct tree_identifier {
struct ht_identifier id;
};
union tree_node {
struct tree_identifier identifier;
};
static int foo (void) {
tree val;
return mep_pragma_lex (&val);
}
void bar (void) {
tree val = 0;
if (__extension__ ({val;})->identifier.id.str == 0) foo ();
}
line-map-ice.c: In function ‘foo’:
line-map-ice.c:17:10: warning: implicit declaration of function
‘mep_pragma_lex’ [-Wimplicit-function-declaration]
line-map-ice.c: In function ‘bar’:
line-map-ice.c:20:6: internal compiler error: in linemap_macro_map_lookup, at
libcpp/line-map.c:991
0x1795063 linemap_macro_map_lookup
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:991
0x1794e4e linemap_lookup(line_maps*, unsigned int)
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:925
0x1795fad linemap_unwind_to_first_non_reserved_loc(line_maps*, unsigned int,
line_map const**)
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:1629
0x1774164 expand_location_1
/home/msebor/scm/fsf/gcc-svn/gcc/input.c:159
0x177525d expand_location_to_spelling_point(unsigned int)
/home/msebor/scm/fsf/gcc-svn/gcc/input.c:751
0x1775283 linemap_client_expand_location_to_spelling_point(unsigned int)
/home/msebor/scm/fsf/gcc-svn/gcc/input.c:766
0x1796d6c rich_location::add_range(unsigned int, unsigned int, bool)
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:2011
0x1796e44 rich_location::add_range(source_range, bool)
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:2024
0x1796b7f rich_location::rich_location(line_maps*, unsigned int)
/home/msebor/scm/fsf/gcc-svn/libcpp/line-map.c:1961
0x176d9ca warning_at(unsigned int, int, char const*, ...)
/home/msebor/scm/fsf/gcc-svn/gcc/diagnostic.c:1024
0x1653666 find_explicit_erroneous_behaviour
/home/msebor/scm/fsf/gcc-svn/gcc/gimple-ssa-isolate-paths.c:400
0x16538ef gimple_ssa_isolate_erroneous_paths
/home/msebor/scm/fsf/gcc-svn/gcc/gimple-ssa-isolate-paths.c:505
0x16539e2 execute
/home/msebor/scm/fsf/gcc-svn/gcc/gimple-ssa-isolate-paths.c:556
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
