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pinskia at gcc dot gnu dot org changed:
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--- Comment #5 from jv244 at cam dot ac dot uk 2007-07-03 18:21 ---
The optimization asked for in this PR is now being performed:
> gfortran -O3 -funroll-loops -S test.f90
yields
globl lxy_
.type lxy_, @function
lxy_:
.LFB2:
movl$3, %eax
ret
.LFE2:
--- Comment #4 from rguenth at gcc dot gnu dot org 2007-03-05 12:22 ---
Note that in addition to unrolling the outermost loop you can experiment with
adjusting the --param max-completely-peeled-insns param. Also I wonder if
DO lxb=0,0
is really common (if so, the frontend might want
--- Comment #3 from rakdver at atrey dot karlin dot mff dot cuni dot cz
2007-03-05 11:49 ---
Subject: Re: unroll/peel loops not aggressive enough
> We don't unroll non-innermost loops at the moment. I don't know if sccp can
> be taught to handle this case (and if it's worth it).
It
--- Comment #2 from jv244 at cam dot ac dot uk 2007-03-05 11:47 ---
(In reply to comment #1)
> We don't unroll non-innermost loops at the moment. I don't know if sccp can
> be taught to handle this case (and if it's worth it).
such small loops are quite typical for some quantum chemist
--- Comment #1 from rguenth at gcc dot gnu dot org 2007-03-05 10:18 ---
We don't unroll non-innermost loops at the moment. I don't know if sccp can
be taught to handle this case (and if it's worth it).
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rguenth at gcc dot gnu dot org changed:
What|Removed
