[llvm-dev] Multi-Threading Compilers

[Chris Lattner via llvm-dev]

> On Mar 25, 2020, at 12:52 AM, Doerfert, Johannes <jdoerfert at anl.gov> wrote:
> 
> 
> Some random thoughts:
> 
> If no pass ever walks the use list of a constant, except globals which
> we could handle differently, we could get rid of their use-list or
> overwrite their use-list interface functions to make them no-ops. 

This would be really problematic because it breaks orthogonality in the compiler.  Today, you can walk the use-list of any operand to an instruction.  This would be broken by this change, which would make it much easier to write buggy/incorrect compiler code and passes.

-Chris

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