[llvm-dev] Virtual register defs don't dominate all uses

Quentin Colombet via llvm-dev llvm-dev at lists.llvm.org
Tue Apr 16 15:05:03 PDT 2019

Hi Josh,

That means that at least one use of the reporter virtual register happens before its definition.
… = V1 <—— V1 is not defined here
V1 = … <— V1 def does not dominate all its use

> On Apr 16, 2019, at 2:47 PM, Josh Sharp via llvm-dev <llvm-dev at lists.llvm.org> wrote:
>  Hi all,
> I'm getting this error:  "Virtual register defs don't dominate all uses". It comes from llvm/lib/CodeGen/MachineVerifier.cpp:2138 
> I don't understand what it means. Does anyone know?
> Thanks.
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