[llvm-dev] mem2reg not working in this case?

[Frank Winter via llvm-dev]

I can't get the alloca in attached function to be promoted to (a) register(s).

I try with

opt -mem2reg < module_eval0.ll

but the output is unchanged. Using LLVM 13 release.

Can anyone see why it's not working? Is this too complicated for mem2reg? The alloca is moved to the beginning.. is this the problem?

Frank

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