* [IA32] -fschedule-insns and -fschedule-insns2...
@ 2003-08-01 10:20 Daniel Blueman
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From: Daniel Blueman @ 2003-08-01 10:20 UTC (permalink / raw)
To: gcc
I have always been finding that adding the flag -fschedule-insns when
building on IA32/i686 can buy as much as 5% performance improvement in code
execution time.
This page [http://www.gnu.org/software/gcc/projects/optimize.html] states
that it is always disabled by the IA32 back-end - what is the current status of
developers' views on it?
I am aware that this an cause register allocation failures at compile-time,
so is that why it is disabled? Also, this must imply that -fschedule-insns2
is disabled, no?
Please CC me on any replies!
Many thanks,
Dan
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Daniel J Blueman
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2003-08-01 10:20 [IA32] -fschedule-insns and -fschedule-insns2 Daniel Blueman
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