merge llvm-16.0.6

Merge LLVM 13.0.0.

Merge LLVM 11.1.0.

Delete my leftover comment.

This comment was from my commit of 2020-05-02,
> Don't make an illegal adde. Avoids fatal error on PowerPC.

When we merged LLVM 10, we got upstream's fix for the illega

Delete my leftover comment.

This comment was from my commit of 2020-05-02,
> Don't make an illegal adde. Avoids fatal error on PowerPC.

When we merged LLVM 10, we got upstream's fix for the illegal adde
problem, and this comment became the only difference in this file
between us and upstream.

Found by Brad Smith.

show more ...

Import LLVM 10.0.1 including clang, lld and lldb.

Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty