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* [Bug target/92953] Undesired if-conversion with overflow builtins
[not found] <bug-92953-4@http.gcc.gnu.org/bugzilla/>
@ 2023-02-18 4:23 ` pinskia at gcc dot gnu.org
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From: pinskia at gcc dot gnu.org @ 2023-02-18 4:23 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92953
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
On x86_64 since the flags get clobbered with almost all instructions. Either
you do the subtraction twice or you use set instruction. GCC choses the later
... I suspect that is a general issue that shows up more than normal on x86_64
than any other target due to that.
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[not found] <bug-92953-4@http.gcc.gnu.org/bugzilla/>
2023-02-18 4:23 ` [Bug target/92953] Undesired if-conversion with overflow builtins pinskia at gcc dot gnu.org
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