On Thu, Apr 21, 2016 at 11:39 AM, Jonathan Wakely <jwakely....@gmail.com> wrote: > On 21 April 2016 at 03:41, lh_mouse wrote: >> See this example: http://coliru.stacked-crooked.com/a/048b4aa5046da11b >> >> In this example the function is called recursively. > > See the original email you replied to: > > "I understand if this function is recursive and pointer of the array > is involved, GCC would have to maintain the array on stack and hence > the initialization." > > The question is about cases where that doesn't happen.
The decision on whether to localize the array and inline the init is done at gimplification time. The plan is to delay this until SRA which could then also apply the desired optimization of removing the local in case it is never written to. Richard.
