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From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/104604] New: wrong code with -O2 -fconserve-stack --param=vrp1-mode=ranger Date: Sat, 19 Feb 2022 07:55:17 +0000 [thread overview] Message-ID: <bug-104604-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104604 Bug ID: 104604 Summary: wrong code with -O2 -fconserve-stack --param=vrp1-mode=ranger Product: gcc Version: 12.0 Status: UNCONFIRMED Keywords: wrong-code Severity: normal Priority: P3 Component: tree-optimization 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 52479 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52479&action=edit reduced testcase Output: $ x86_64-pc-linux-gnu-gcc -O2 -fconserve-stack --param=vrp1-mode=ranger testcase.c -Wno-psabi $ ./a.out Aborted The value of x[] is {3, 3, 3, 3, ... } It seems "i /= c;" got optimised out. $ 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-r12-7293-20220218075854-gfe79d652c96-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/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 --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-r12-7293-20220218075854-gfe79d652c96-checking-yes-rtl-df-extra-nobootstrap-amd64 Thread model: posix Supported LTO compression algorithms: zlib zstd gcc version 12.0.1 20220218 (experimental) (GCC)
next reply other threads:[~2022-02-19 7:55 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-19 7:55 zsojka at seznam dot cz [this message] 2022-02-19 8:10 ` [Bug tree-optimization/104604] [12 Regression]wrong code with -O2 VRP Complex integer division issue pinskia at gcc dot gnu.org 2022-02-21 9:44 ` rguenth at gcc dot gnu.org 2022-02-21 12:40 ` [Bug tree-optimization/104604] [12 Regression]wrong code with -O2 VRP Complex integer division issue since r12-3328 jakub at gcc dot gnu.org 2022-02-21 13:04 ` jakub at gcc dot gnu.org 2022-02-22 9:43 ` cvs-commit at gcc dot gnu.org 2022-02-22 9:56 ` jakub at gcc dot gnu.org
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