https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88478
Bug ID: 88478
Summary: valgrind error in cselib_record_sets
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C++ code:
struct a {
bool b;
int second;
template < typename c, typename d > a(c, d) {}
};
enum f {}g;
a h() { return a(false, g); }
compiled by a valgrind version of recent gcc trunk and compiler
flag -O2, does this:
$ ~/gcc/results/bin/gcc -c -O2 bug490.cc
==9146== Conditional jump or move depends on uninitialised value(s)
==9146== at 0x823414: cselib_record_sets(rtx_insn*) (cselib.c:2619)
==9146== by 0x82581F: cselib_process_insn(rtx_insn*) (cselib.c:2791)
==9146== by 0x12903FF: dse_step1 (dse.c:2660)
==9146== by 0x12903FF: rest_of_handle_dse (dse.c:3576)
$ ~/gcc/results/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/home/dcb/gcc/results/bin/gcc
COLLECT_LTO_WRAPPER=/home/dcb/gcc/results.267000.valgrind/libexec/gcc/x86_64-pc-linux-gnu/9.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: ../trunk/configure
--prefix=/home/dcb/gcc/results.267000.valgrind --disable-bootstrap
--disable-multilib --disable-werror --enable-checking=valgrind
--enable-languages=c,c++,fortran
Thread model: posix
gcc version 9.0.0 20181211 (experimental) (GCC)
$
