Can we use a prebuilt llvm for iree?

[FlintWangacc]

I try to debug the instruction selection part of neural network compile. But the default build of iree with llvm seems has no line number information.

(gdb) n
Single stepping until exit from function _ZN4llvm16SelectionDAGISelC2ERNS_13TargetMachineENS_15CodeGenOptLevelE@plt,
which has no line number information.

Is there any method to fix this?

[ScottTodd]

To answer the direct question, yes... with some constraints. See https://github.com/iree-org/iree/tree/main/build_tools/llvm.

You should be able to get more debug information from a source build with the right compiler options though.