Messages in this thread | | | From | David Howells <> | Subject | Re: Compilers and RCU readers: Once more unto the breach! | Date | Wed, 20 May 2015 14:18:37 +0100 |
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Paul E. McKenney <paulmck@linux.vnet.ibm.com> wrote:
> > Additionally, what about the following code? > > > > char *x = y ? z : z; > > > > Does that extend a dependency chain from z to x? If so, I can imagine a > > CPU breaking that in practice. > > I am not seeing this. I would expect the compiler to optimize to > something like this: > > char *x = z;
Why? What if y has a potential side-effect (say it makes a function call)?
David
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