Messages in this thread | | | Date | Wed, 20 May 2015 14:44:30 +0100 | From | Ramana Radhakrishnan <> | Subject | Re: Compilers and RCU readers: Once more unto the breach! |
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On 20/05/15 14:37, David Howells wrote: > Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote: > >> I was thinking of "y" as a simple variable, but if it is something more >> complex, then the compiler could do this, right? >> >> char *x; >> >> y; >> x = z; > > Yeah. I presume it has to maintain the ordering, though.
The scheduler for e.g. is free to reorder if it can prove there is no dependence (or indeed side-effects for y) between insns produced for y and `x = z'.
regards Ramana
> > David >
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