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Re: [PATCH] Fix DCE REG_LIBCALL note moving from noop move insns (PR rtl-optimization/33644)
Paolo Bonzini wrote:
>> So that would mean that you don't even need libcall notes to CSE
>> _tls_get_addr calls?
> CALL_INSNs are never DCE'd:
> static bool
> deletable_insn_p (rtx insn, bool fast)
> rtx body, x;
> int i;
> if (!NONJUMP_INSN_P (insn))
> return false;
this could be too conservative, there is no reason not dce pure or const