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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/104869] [12 Regression] Miscompilation of qt5-qtdeclarative since r12-6342-ge7a7dbb5ca5dd696 Date: Fri, 11 Mar 2022 11:00:24 +0000 [thread overview] Message-ID: <bug-104869-4-jjeJAHG4o8@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-104869-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104869 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2022-03-11 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Reduced self-contained testcase for the testsuite: // PR rtl-optimization/104869 // { dg-do run } // { dg-options "-O2 -fvisibility=hidden" } // { dg-require-visibility "" } struct QBasicAtomicInteger { [[gnu::noipa]] int loadRelaxed() { return 1; } }; struct RefCount { bool deref() { int count = atomic.loadRelaxed(); if (count) return false; return deref(); } QBasicAtomicInteger atomic; }; struct QArrayData { RefCount ref; }; struct QString { ~QString(); QArrayData d; }; int ok; QString::~QString() { d.ref.deref(); } struct Label { bool isValid() { return generator; } int *generator; int index; }; struct ControlFlow; struct Codegen { [[gnu::noipa]] bool visit(); ControlFlow *controlFlow; }; struct ControlFlow { enum UnwindType { EE }; struct UnwindTarget { Label linkLabel; }; ControlFlow *parent; UnwindType unwindTarget_type; UnwindTarget unwindTarget() { QString label; ControlFlow *flow = this; while (flow) { Label l = getUnwindTarget(unwindTarget_type, label); if (l.isValid()) return {l}; flow = flow->parent; } return UnwindTarget(); } [[gnu::noipa]] Label getUnwindTarget(UnwindType, QString &) { Label l = { &ok, 0 }; return l; } }; [[gnu::noipa]] void foo(int) { ok = 1; } [[gnu::noipa]] bool Codegen::visit() { if (!controlFlow) return false; ControlFlow::UnwindTarget target = controlFlow->unwindTarget(); if (target.linkLabel.isValid()) foo(2); return false; } int main() { ControlFlow cf = { nullptr, ControlFlow::UnwindType::EE }; Codegen c = { &cf }; c.visit(); if (!ok) __builtin_abort (); }
next prev parent reply other threads:[~2022-03-11 11:00 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-03-10 18:43 [Bug rtl-optimization/104869] New: [12 Regression] Miscompilation of qt5-qtdeclarative jakub at gcc dot gnu.org 2022-03-10 19:32 ` [Bug rtl-optimization/104869] [12 Regression] Miscompilation of qt5-qtdeclarative since r12-6342-ge7a7dbb5ca5dd696 jakub at gcc dot gnu.org 2022-03-10 19:32 ` jakub at gcc dot gnu.org 2022-03-11 11:00 ` jakub at gcc dot gnu.org [this message] 2022-03-11 12:04 ` jakub at gcc dot gnu.org 2022-03-20 14:02 ` rsandifo at gcc dot gnu.org 2022-03-21 10:52 ` cvs-commit at gcc dot gnu.org 2022-03-21 10:52 ` rsandifo at gcc dot gnu.org 2022-07-04 19:02 ` cvs-commit at gcc dot gnu.org
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