[llvm-dev] Multi-Threading Compilers

David Chisnall via llvm-dev llvm-dev at lists.llvm.org
Thu Mar 26 04:09:18 PDT 2020

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.


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