https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116411
Bug ID: 116411
Summary: [15 Regression] ICE on readline-8.2p13: in
factor_out_conditional_operation, at
tree-ssa-phiopt.cc:407
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed ICE on today's gcc-master r15-2990-gf11bc0884467c6 when building
readline-8.2p13.
Extracted example:
$ cat complete.c.c
int rl_display_match_list_sind;
char *rl_display_match_list_temp;
char rl_display_match_list_t;
unsigned long strlen ();
void
rl_display_match_list () {
rl_display_match_list_sind = rl_display_match_list_temp ? strlen
(rl_display_match_list_temp) : strlen (&rl_display_match_list_t);
}
Crashing:
$ gcc -O1 -c complete.c.c
during GIMPLE pass: phiopt
complete.c.c: In function 'rl_display_match_list':
complete.c.c:5:69: internal compiler error: in
factor_out_conditional_operation, at tree-ssa-phiopt.cc:407
5 | void
rl_display_match_list () {
rl_display_match_list_sind = rl_display_match_list_temp ? strlen
(rl_display_match_list_temp) : strlen (&rl_display_match_list_t);
}
| ^~~~
0x2092efd diagnostic_context::diagnostic_impl(rich_location*,
diagnostic_metadata const*, int, char const*, __va_list_tag (*) [1],
diagnostic_t)
???:0
0x20a0a8f internal_error(char const*, ...)
???:0
0x754efb fancy_abort(char const*, int, char const*)
???:0
0x736659 factor_out_conditional_operation(edge_def*, edge_def*, gphi*,
tree_node*, tree_node*, gimple*) [clone .cold]
???:0
0xfaea97 (anonymous namespace)::pass_phiopt::execute(function*)
???:0
$ gcc -v |& unnix
Using built-in specs.
COLLECT_GCC=/<<NIX>>/gcc-15.0.0/bin/gcc
COLLECT_LTO_WRAPPER=/<<NIX>>/gcc-15.0.0/libexec/gcc/x86_64-unknown-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../source/configure --prefix=/<<NIX>>/gcc-15.0.0
--with-gmp-include=/<<NIX>>/gmp-6.3.0-dev/include
--with-gmp-lib=/<<NIX>>/gmp-6.3.0/lib
--with-mpfr-include=/<<NIX>>/mpfr-4.2.1-dev/include
--with-mpfr-lib=/<<NIX>>/mpfr-4.2.1/lib --with-mpc=/<<NIX>>/libmpc-1.3.1
--with-native-system-header-dir=/<<NIX>>/glibc-2.39-52-dev/include
--with-build-sysroot=/
--with-gxx-include-dir=/<<NIX>>/gcc-15.0.0/include/c++/15.0.0/
--program-prefix= --enable-lto --disable-libstdcxx-pch
--without-included-gettext --with-system-zlib --enable-checking=release
--enable-static --enable-languages=c,c++ --disable-multilib --enable-plugin
--disable-libcc1 --with-isl=/<<NIX>>/isl-0.20 --disable-bootstrap
--build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu
--target=x86_64-unknown-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 99999999 (experimental) (GCC)
