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* [Bug target/113084] New: aarch64: vget_low blocks tail-call @ 2023-12-19 16:30 joe.ramsay at arm dot com 2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: joe.ramsay at arm dot com @ 2023-12-19 16:30 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084 Bug ID: 113084 Summary: aarch64: vget_low blocks tail-call Product: gcc Version: 13.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: joe.ramsay at arm dot com Target Milestone: --- In the following, f could be tail-called. #include <arm_neon.h> float32x4_t f(float32x4_t); float32x2_t g(float32x2_t x) { return vget_low_f32 (f (vcombine_f32 (x, x))); } however GCC 13 emits the following at O1, O2 and O3 g: ins v0.d[1], v0.d[0] stp x29, x30, [sp, -16]! mov x29, sp bl f ldp x29, x30, [sp], 16 ret I observed the same or worse codegen for all versions of Arm64 GCC on Compiler Explorer ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call 2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com @ 2023-12-19 16:57 ` pinskia at gcc dot gnu.org 2023-12-19 16:57 ` pinskia at gcc dot gnu.org ` (2 subsequent siblings) 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-12-19 16:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|target |middle-end Keywords| |missed-optimization --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Gcc also currently does not support tail calls if the types change. There is another bug about that. ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call 2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com 2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org @ 2023-12-19 16:57 ` pinskia at gcc dot gnu.org 2023-12-19 17:26 ` pinskia at gcc dot gnu.org 2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-12-19 16:57 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug middle-end/113084] aarch64: vget_low blocks tail-call 2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com 2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org 2023-12-19 16:57 ` pinskia at gcc dot gnu.org @ 2023-12-19 17:26 ` pinskia at gcc dot gnu.org 2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2023-12-19 17:26 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=14441, | |https://gcc.gnu.org/bugzill | |a/show_bug.cgi?id=107503 Ever confirmed|0 |1 Status|UNCONFIRMED |NEW Last reconfirmed| |2023-12-19 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Also related to PR 107503 . ^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug target/113084] aarch64: vget_low blocks tail-call 2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com ` (2 preceding siblings ...) 2023-12-19 17:26 ` pinskia at gcc dot gnu.org @ 2024-01-26 5:19 ` pinskia at gcc dot gnu.org 3 siblings, 0 replies; 5+ messages in thread From: pinskia at gcc dot gnu.org @ 2024-01-26 5:19 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113084 Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|middle-end |target --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Oh __builtin_aarch64_get_lowv4sf is not lowered to BIT_FIELD_REF either which it can be now. ^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2024-01-26 5:19 UTC | newest] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2023-12-19 16:30 [Bug target/113084] New: aarch64: vget_low blocks tail-call joe.ramsay at arm dot com 2023-12-19 16:57 ` [Bug middle-end/113084] " pinskia at gcc dot gnu.org 2023-12-19 16:57 ` pinskia at gcc dot gnu.org 2023-12-19 17:26 ` pinskia at gcc dot gnu.org 2024-01-26 5:19 ` [Bug target/113084] " pinskia at gcc dot gnu.org
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