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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/115363] New: Missing loop vectorization due to loop bound load not being pulled out Date: Wed, 05 Jun 2024 17:55:04 +0000 [thread overview] Message-ID: <bug-115363-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115363 Bug ID: 115363 Summary: Missing loop vectorization due to loop bound load not being pulled out Product: gcc Version: 15.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: enhancement Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pinskia at gcc dot gnu.org Target Milestone: --- Take: ``` struct out { unsigned *array; }; struct m{ void f(out *output); void f1(out *output); int size; }; void m::f(out *output) { for (int k = 0; k < size; k++) { output->array[k] += 1; } } void m::f1(out *output) { int tmp = size; for (int k = 0; k < size; k++) { output->array[k] += 1; } } ``` We should be able to vectorize `m::f` but currently does not since this->size might alias array[k]. But we could version the loop to pull out the this->size out of the loop and we could vectorize the loop then.
next reply other threads:[~2024-06-05 17:55 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2024-06-05 17:55 pinskia at gcc dot gnu.org [this message] 2024-06-06 6:48 ` [Bug tree-optimization/115363] " rguenth at gcc dot gnu.org 2024-06-07 14:19 ` pinskia at gcc dot gnu.org
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