[VM] Should probably add -fno-gcse to the GCC flags

Andreas Raab andreas.raab at gmx.de
Wed Aug 6 21:23:45 UTC 2003


Yes, that I'd be curious about as well. I was seriously wondering how
removing CSE would affect other parts of the system. The VM isn't just
interpret() and while speeding it up typically helps it's important to
balance the use of compiler flags with the overall performance.

Cheers,
  - Andreas

> -----Original Message-----
> From: squeak-dev-bounces at lists.squeakfoundation.org 
> [mailto:squeak-dev-bounces at lists.squeakfoundation.org] On 
> Behalf Of John M McIntosh
> Sent: Wednesday, August 06, 2003 11:10 PM
> To: The general-purpose Squeak developers list
> Subject: Re: [VM] Should probably add -fno-gcse to the GCC flags
> 
> 
> Ok, I get 2% better send/sec, but do you know what it does to the  
> macro-benchmarks?
> 
> On Wednesday, August 6, 2003, at 12:52  PM, Ned Konz wrote:
> 
> > The GCC manual recommends trying the -fno-gcse (omit global common
> > subexpression extraction) flag when you're using the 
> computed gotos. --
> ==============================================================
> ========== 
> ===
> John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
> Corporate Smalltalk Consulting Ltd.  
> http://www.smalltalkconsulting.com
> 
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