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Re: [tree-ssa Too many edges in CFG


On Thu, 2003-05-08 at 11:58, law@redhat.com wrote:
> In message <1052408863.3648.2078.camel@p4>, Andrew MacLeod writes:
>  >On Thu, 2003-05-08 at 11:39, Jason Merrill wrote:
>  >> On 08 May 2003 11:21:02 -0400, Andrew MacLeod <amacleod@redhat.com> wrote:
>  >> 
>  >> > That won't be good enough, we're going to need those copy-out operations
>  >> > before all function call locations anyway
>  >> 
>  >> Indeed, most non-pure function calls could potentially cause the current
>  >> function to exit abnormally via longjmp or throw.
>  >> 
>  >
>  >Or they could use the global, or re-enter a function with static
>  >locals... So the correct memory has to be stored to (and recovered after
>  >the call) if the variables hasn't coalesced with the correct memory
>  >location. Hoipefully that will be rare :-)
> But there's nothing to recover after a call to a nonreturning function.
> 

No, but that non-returning function might use the value of the
global.... so it has to be right before the call is made. 
 
Andrew


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