[llvm-dev] Multi-Threading Compilers

[David Chisnall via llvm-dev]

On 26/03/2020 11:06, Florian Hahn via llvm-dev wrote:
> One problem is that function passes can add new global, e.g. new declarations if they introduce new calls. I guess that would require some locking, but should happen quite infrequently.

Can they?  I have had to make a pass a ModulePass in the past, because 
it added a global to hold a cache.  The global was used in only the 
function being modified, but the fact that it was a global prevented the 
pass from being a FunctionPass.

David