Safepoints at backward branches in c2

Jonathan Springer springer at
Mon May 12 07:27:01 PDT 2008

Gary Benson wrote:
> Hi all,
> I've been looking through the c2 code and I noticed that safepoint
> checks are inserted before backward branches but not forward branches.
> Why is this?

I believe that safepoints should be executed within a bounded amount
of computation.  Placing them at all backwards branches (and calls)
guarantees that there are no loops without at least one safepoint.


Jonathan Springer     |
Reservoir Labs, Inc.  |

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