Run CI with "expensive pattern checks" on

[AlexanderViand-Intel]

[asraa]

Nice! We already have an asan config at least!

[AlexanderViand-Intel]

Ok, I feel a bit dumb asking this, but how do I pass these kind of flags to the LLVM build from bazel? It seems like configure_llvm only has provisions for selecting targets, but no more general options?

[asraa]

I think you might need to test this since I'm not totally certain but the easiest way would be to create a build configuration in the bazelrc like

build:expensive --copt -DMLIR_ENABLE_EXPENSIVE
build:expensive --config asan

So if you run any build with bazel build --config expensive then it would enable the asan flags and the macro.

I think that's at least how I'd work around the configure_llvm limitation