Program analysis has specific requirements for compiler toolchains that are usually unsatisfied. Ideally, an analysis tool would pick the best-fit representation that preserves interesting semantic features. Such a representation would know the precise relationships between low-level constructs in IR and the analyzed source code. LLVM IR is rarely the best fit representation for program analysis. In this talk, we will look at how we can improve the situation using an MLIR infrastructure called VAST. VAST is an MLIR library for multi-level C/C++ representation. With VAST, an analysis does not need to commit to a single best fit. Instead, an analysis can have simultaneous visibility into multiple progressions of the code, from very high-level down to very low-level.