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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/102798] New: [9/10/11/12 Regression] wrong code with -O3 -fno-tree-pta -mavx512f Date: Sat, 16 Oct 2021 12:43:56 +0000 [thread overview] Message-ID: <bug-102798-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102798 Bug ID: 102798 Summary: [9/10/11/12 Regression] wrong code with -O3 -fno-tree-pta -mavx512f Product: gcc Version: 12.0 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 Created attachment 51616 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51616&action=edit auto-reduced testcase (from OpenSSL sources) $ x86_64-pc-linux-gnu-gcc -O3 -fno-tree-pta -mavx512f testcase.c $ gdb ./a.out ... (gdb) r Starting program: /home/smatz/gcc-bug/58/a.out Program received signal SIGSEGV, Segmentation fault. BUF_reverse (out=<optimized out>, out@entry=0x7fffffffda60 "", in=<optimized out>, in@entry=0x0, size=size@entry=40) at testcase.c:11 11 *out-- = *in++; (gdb) disas Dump of assembler code for function BUF_reverse: ... 0x0000000000401200 <+96>: and $0xffffffffffffffe0,%r9 0x0000000000401204 <+100>: add %rcx,%r9 0x0000000000401207 <+103>: nopw 0x0(%rax,%rax,1) => 0x0000000000401210 <+112>: vmovdqu (%rdx),%ymm2 0x0000000000401214 <+116>: add $0x20,%rdx 0x0000000000401218 <+120>: sub $0x20,%rdi 0x000000000040121c <+124>: vperm2i128 $0x1,%ymm2,%ymm2,%ymm0 ... (gdb) info reg rax 0x28 40 rbx 0x4013d0 4199376 rcx 0x0 0 rdx 0x0 0 ... $ 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-r12-4456-20211016001627-g93d183a5fff-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.0/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 --with-cloog --with-ppl --with-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-r12-4456-20211016001627-g93d183a5fff-checking-yes-rtl-df-extra-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.0 20211016 (experimental) (GCC)
next reply other threads:[~2021-10-16 12:43 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-16 12:43 zsojka at seznam dot cz [this message] 2021-10-16 15:54 ` [Bug tree-optimization/102798] [9/10/11/12 Regression] wrong code with -O3 -fno-tree-pta -mavx512f by r9-2475 hjl.tools at gmail dot com 2021-10-16 16:31 ` hjl.tools at gmail dot com 2021-10-16 18:10 ` hjl.tools at gmail dot com 2021-10-16 18:16 ` hjl.tools at gmail dot com 2021-10-16 18:42 ` pinskia at gcc dot gnu.org 2021-10-16 18:43 ` pinskia at gcc dot gnu.org 2021-10-16 18:46 ` [Bug tree-optimization/102798] [9/10/11/12 Regression] wrong code with -O3 -fno-tree-pta " pinskia at gcc dot gnu.org 2021-10-16 19:08 ` hjl.tools at gmail dot com 2021-10-17 0:53 ` hjl.tools at gmail dot com 2021-10-17 2:49 ` hjl.tools at gmail dot com 2021-10-17 13:33 ` hjl.tools at gmail dot com 2021-10-17 18:29 ` hjl.tools at gmail dot com 2021-10-18 6:39 ` rguenth at gcc dot gnu.org 2021-10-18 7:03 ` rguenth at gcc dot gnu.org 2021-10-18 8:26 ` cvs-commit at gcc dot gnu.org 2021-10-18 8:27 ` [Bug tree-optimization/102798] [9/10/11 " rguenth at gcc dot gnu.org 2021-11-08 13:32 ` cvs-commit at gcc dot gnu.org 2022-02-17 10:48 ` [Bug tree-optimization/102798] [9/10 " cvs-commit at gcc dot gnu.org 2022-02-17 11:57 ` [Bug tree-optimization/102798] [9 " cvs-commit at gcc dot gnu.org 2022-02-17 11:58 ` rguenth at gcc dot gnu.org 2022-02-18 7:10 ` rguenth at gcc dot gnu.org 2022-02-18 7:11 ` rguenth at gcc dot gnu.org 2022-02-18 7:13 ` rguenth at gcc dot gnu.org 2022-02-18 8:21 ` rguenth at gcc dot gnu.org 2022-02-18 8:22 ` rguenth at gcc dot gnu.org
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