unknown tbaa call instruction user inst: %249 = tail call double @tanh(double noundef %248) #37, !tbaa !4 vdptr: {[]:Pointer, [-1]:Integer}

[superustc]

/home/mixu/software/llvm-20.1.8/llvm-project-llvmorg-20.1.8/build/bin/clang++ -O3 -DNDEBUG -std=gnu++17 -fPIC --target=x86_64-pc-linux-gnu --gcc-toolchain=/home/mixu/dev/vNNN/FBU_Dependencies/thirdparty/compilers/gcc/linx64/bin/.. -std=c++17 -stdlib=libstdc++ -Wno-deprecated-builtins -Wno-deprecated-declarations -Wno-unknown-warning-option -Wno-c++20-extensions -w -Wno-missing-template-arg-list-after-template-kw -fplugin="/home/mixu/software/Enzyme/enzyme/build-20/Enzyme/libClangEnzyme.so" -mllvm -enzyme-loose-types=1 -mllvm -enzyme-detect-readthrow=0 -MD -MT FanSource.cxx.o -MF FanSource.cxx.o.d -o FanSource.cxx.o -c FanSource.cxx

gives

unknown tbaa call instruction user inst:   %249 = tail call double @tanh(double noundef %248) #37, !tbaa !4 vdptr: {[]:Pointer, [-1]:Integer}
unknown tbaa call instruction user inst:   %277 = tail call double @sqrt(double noundef %276) #35, !tbaa !33 vdptr: {[]:Pointer, [-1]:Integer}
 unknown tbaa call instruction user inst:   %513 = tail call double @tanh(double noundef %512) #35, !tbaa !4 vdptr: {[]:Pointer, [-1]:Integer}
 unknown tbaa call instruction user inst:   %524 = tail call double @tanh(double noundef %523) #35, !tbaa !4 vdptr: {[]:Pointer, [-1]:Integer}

[superustc]

from chatgpt " Enzyme’s TBAA parser in TypeAnalysis.cpp doesn’t know how to handle the new LLVM 20 call-site !tbaa metadata, so it hits the “unknown tbaa call instruction” path and asserts. The calls
you see (tanh, sqrt) now carry !tbaa, which triggers that assert." and the proposed fix

[jeffpollock9]

I think this might be the same warning I was getting in #2490