https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77761
Bug ID: 77761 Summary: [7 Regression] wrong code with -fschedule-insns -mavx512f --param=max-pending-list-length=512 Product: gcc Version: 7.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: zsojka at seznam dot cz Target Milestone: --- Host: x86_64-pc-linux-gnu Target: x86_64-pc-linux-gnu Build: x86_64-pc-linux-gnu Created attachment 39702 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39702&action=edit reduced testcase Compiler output: $ x86_64-pc-linux-gnu-gcc -O2 -fno-guess-branch-probability -fschedule-insns -fno-tree-ter -mavx512f --param=max-pending-list-length=512 testcase.c $ sde64 -- ./a.out Aborted Correct value of x[0] is 0x0000000000ff00ff0000000000fd0002, wrong value is 0x0000000000ff00000000000100fd0001 $ x86_64-pc-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-240535-checking-yes-rtl-df-extra-nobootstrap-nographite-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/7.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --disable-bootstrap --without-cloog --without-ppl --without-isl --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --with-ld=/usr/bin/x86_64-pc-linux-gnu-ld --with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-240535-checking-yes-rtl-df-extra-nobootstrap-nographite-amd64 Thread model: posix gcc version 7.0.0 20160927 (experimental) (GCC)