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From: "vsevolod.livinskij at frtk dot ru" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102622] New: Wrong code with -O3 for skylake-avx512 and icelake-server Date: Tue, 05 Oct 2021 19:37:23 +0000 [thread overview] Message-ID: <bug-102622-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102622 Bug ID: 102622 Summary: Wrong code with -O3 for skylake-avx512 and icelake-server Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: vsevolod.livinskij at frtk dot ru Target Milestone: --- Reproducer: // func.cpp #include <algorithm> extern int var_20, var_22; extern short arr_32[]; extern char arr_45[]; void test(int a, unsigned b, long long *c) { for (short d = 0; d < 13; d++) { for (int e = 0; e < a; e += 3) var_20 = 0; if (std::max(b, unsigned((short)b))) { arr_32[d] = 0; var_22 = *c; } for (unsigned f = 0; f < 69; f += 4) arr_45[f] = 0; } } driver.cpp #include <stdio.h> unsigned long long int a = 10693271954245845448ULL; unsigned int b = 1144022456U; long long int c = 42; int var_20 = 0; long long int var_22 = 0; unsigned short arr_32 [13]; unsigned char arr_45 [69]; void test(int a, unsigned int b, long long int* c); int main() { test(a, b, &c); printf("%llu\n", var_22); } Error: >$ g++ -O3 -march=skylake-avx512 func.cpp driver.cpp && sde -skx -- ./a.out 0 >$ g++ -O2 -march=skylake-avx512 func.cpp driver.cpp && sde -skx -- ./a.out 42 GCC version: Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/testing/gcc/bin/libexec/gcc/x86_64-pc-linux-gnu/12.0.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /testing/gcc/gcc_src/configure --enable-multilib --prefix=/testing/gcc/bin --disable-bootstrap Thread model: posix Supported LTO compression algorithms: zlib gcc version 12.0.0 20211004 (154fd0896ef22fcf5235e35e2b795394dddd7a33) (GCC)
next reply other threads:[~2021-10-05 19:37 UTC|newest] Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-10-05 19:37 vsevolod.livinskij at frtk dot ru [this message] 2021-10-05 22:21 ` [Bug tree-optimization/102622] [12 Regression] " pinskia at gcc dot gnu.org 2021-10-05 22:36 ` pinskia at gcc dot gnu.org 2021-10-05 23:31 ` pinskia at gcc dot gnu.org 2021-10-06 7:23 ` [Bug tree-optimization/102622] [12 Regression] Wrong code with -O3 for skylake-avx512 and icelake-server by r12-3903 aldyh at gcc dot gnu.org 2021-10-06 8:42 ` rguenth at gcc dot gnu.org 2021-10-06 12:55 ` hjl.tools at gmail dot com 2021-10-06 13:04 ` hjl.tools at gmail dot com 2021-10-06 13:10 ` aldyh at gcc dot gnu.org 2021-10-06 13:12 ` aldyh at gcc dot gnu.org 2021-10-06 13:26 ` hjl.tools at gmail dot com 2021-10-06 14:19 ` aldyh at redhat dot com 2021-10-06 14:21 ` hjl.tools at gmail dot com 2021-10-07 16:07 ` aldyh at gcc dot gnu.org 2021-10-07 21:29 ` pinskia at gcc dot gnu.org 2021-10-07 21:31 ` pinskia at gcc dot gnu.org 2021-10-08 6:04 ` pinskia at gcc dot gnu.org 2021-10-09 22:25 ` pinskia at gcc dot gnu.org 2021-10-10 1:05 ` [Bug tree-optimization/102622] [9/10/12 Regression] Wrong code with -O1 and above due to phiopt and signed one bit integer types pinskia at gcc dot gnu.org 2021-10-10 1:54 ` pinskia at gcc dot gnu.org 2021-10-10 5:49 ` pinskia at gcc dot gnu.org 2021-10-10 9:04 ` cvs-commit at gcc dot gnu.org 2021-10-10 9:06 ` [Bug tree-optimization/102622] [9/10 " pinskia at gcc dot gnu.org 2021-10-10 9:18 ` pinskia at gcc dot gnu.org 2021-10-10 23:21 ` pinskia at gcc dot gnu.org 2021-10-11 9:22 ` cvs-commit at gcc dot gnu.org 2021-10-11 9:24 ` [Bug tree-optimization/102622] [9 " pinskia at gcc dot gnu.org 2021-10-11 21:07 ` cvs-commit at gcc dot gnu.org 2021-10-11 21:08 ` pinskia at gcc dot gnu.org 2021-10-11 21:19 ` cvs-commit at gcc dot gnu.org 2021-11-09 19:03 ` cvs-commit at gcc dot gnu.org
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