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Re: PR 15492: floating-point arguments are loaded too early to x87 stack
On Saturday 21 August 2004 03:29, James E Wilson wrote:
> Uros Bizjak wrote:
> > Is there everything OK with fsched-insn2 for pentum4 case?
>
> The problem here is that we have no DFA scheduler for pentium4, and we
> also have no default scheduling info. As a result, the compiler assumes
> that almost everything takes 1 cycle. This is unlikely to result in a
> good schedule.
Note, that since we've completely switched over to DFA scheduler
descriptions only, the compiler assumes everything takes 0 cycles.
In the old pipeline description, the compiler assumed a default
ready latency of 1 cycle for every insn that did not match a
define_function_unit. In the DFA scheduler, the compiler assumes
a default ready latency of 0 cycles for insns that do not match
a define_insn_reservation.
Gr.
Steven