https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109502
Bug ID: 109502 Summary: [12/13 Regression] wrong code with -O -ftree-vectorize -fvect-cost-model=unlimited on aarch64 Product: gcc Version: 13.0 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: aarch64-unknown-linux-gnu Created attachment 54853 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54853&action=edit reduced testcase Output: $ aarch64-unknown-linux-gnu-gcc -O -ftree-vectorize -fvect-cost-model=unlimited testcase.c -static $ qemu-aarch64 -- ./a.out qemu: uncaught target signal 6 (Aborted) - core dumped Aborted The value is 0xffffffff instead of 1. $ aarch64-unknown-linux-gnu-gcc -v Using built-in specs. COLLECT_GCC=/repo/gcc-trunk/binary-latest-aarch64/bin/aarch64-unknown-linux-gnu-gcc COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r13-7165-20230413001648-g66c7257b675-checking-yes-rtl-df-extra-aarch64/bin/../libexec/gcc/aarch64-unknown-linux-gnu/13.0.1/lto-wrapper Target: aarch64-unknown-linux-gnu Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++ --enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra --with-cloog --with-ppl --with-isl --with-sysroot=/usr/aarch64-unknown-linux-gnu --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=aarch64-unknown-linux-gnu --with-ld=/usr/bin/aarch64-unknown-linux-gnu-ld --with-as=/usr/bin/aarch64-unknown-linux-gnu-as --disable-libstdcxx-pch --prefix=/repo/gcc-trunk//binary-trunk-r13-7165-20230413001648-g66c7257b675-checking-yes-rtl-df-extra-aarch64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 13.0.1 20230413 (experimental) (GCC)