https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83086
Bug ID: 83086 Summary: valgrind error in recent build 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: --- I tried a valgrind build of recent gcc trunk with -O3 and got this: ==26140== Conditional jump or move depends on uninitialised value(s) ==26140== at 0x145D303: (anonymous namespace)::imm_store_chain_info::try_coalesce_bswap((anonymous namespace)::merged_store_group*, unsigned int, unsigned int) (gimple-ssa-store-merging.c:2393) ==26140== by 0x146390F: coalesce_immediate_stores (gimple-ssa-store-merging.c:2575) ==26140== by 0x146390F: terminate_and_process_chain (gimple-ssa-store-merging.c:3726) Source code is 254948 jakub if (n.base_addr && vuse_store) Configure is ../trunk/configure --prefix=/home/dcb/gcc/results.254990.valgrind \ --disable-bootstrap \ --disable-multilib \ --disable-werror \ --enable-checking=valgrind \ --enable-languages=c,c++,fortran sed 's/-O2/-O3 -funroll-loops -Wtautological-compare/' < Makefile > Makefile.tmp mv Makefile.tmp Makefile