[tree-profiling-branch] Fix mudflap

[Frank Eigler]

Steven Bosscher <stevenb@suse.de> writes:

> [...]  On the tree-profiling-branch, all mudflap test were failing
> because mudflap is not a CFG-aware pass.  The attached patch changes
> this.  It makes mudflap2 work on the CFG.  [...]

Thanks.  I have no objection to putting this on mainline too, if it
does not worsen the test results.  (I don't know if mainline ssa
already makes it possible for mudflap2 to deal with CFGs instead of
trees.)

- FChE