Re: Merge switch statements in tree-cfgcleanup

[Jeff Law]

On 07/22/2016 07:13 AM, Richard Biener wrote:

+  if (dom_info_available_p (CDI_DOMINATORS))

I think DOM info is always available during CFG cleanup
My recollection is that the cfg cleanup routines start by removing 
unreachables, then recomputing the dominator tree if it's not available.

That sequencing is vital as the dominator tree builder will assert 
there's no unreachables in the CFG.

jeff