Failed to deduce type of memset with optimization level > 0 about enzyme HOT 4 OPEN

Yeah a reproducer would be helpful. As one hint, it seems to not be terribly happy about: _ZZ3runE13__sharedStack. Maybe mark it as inactive?

Regardless you probably want to have all differentiable variables passed as arguments rather than globals

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Sorry, I found it was my mistake. Although _ZZ3runE13__sharedStack is a local variable, but I mistakenly mark it as static, so it became a global variable.

Closing this issue, and it would be great to see if the compiler can warn me about this.

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Sorry but after I changed it to static, the "failed to deduce type of memset" message still occurs. This time _ZZ3runE13__sharedStack is a genuine local variable. Besides, it is not inactive, because gradient actually flows by this variable.

_ZZ3runE13__sharedStack is actually a holder array for other variables I use. Other variables are slices of this array.

See the log and the reproducer:
log.txt
run-4ab46e.cpp.txt
run-4ab46e.sh.txt
Please change *.cpp.txt to *.txt, and *.sh.txt to *.txt. It was because GitHub don't allow uploading .cpp and .sh files.

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I'm having some issues reproducing this. Can you make a version which errors in the Enzyme Compiler Explorer? https://enzyme.mit.edu/explorer/

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