Re-Apply "[DXIL][Analysis] Implement enough of DXILResourceAnalysis for buffers" (#104517)

Some build configs allow `llvm_unreachable` in a constexpr context, but
not all, so these functions that map a fully covered enum to a string
can't be constexpr. This version fixes that by dropping constexpr from
those functions.

This reverts commit fcc318ff7960d7de8cbac56eb4f32b44b5261677, reapplying
28d577ecefa1557f5dea5566bf33b885c563d14b.

Original message follows:

This implements the DXILResourceAnalysis pass for `dx.TypedBuffer` and
`dx.RawBuffer` types. This should be sufficient to lower
`dx.handle.fromBinding` for this set of types, but it leaves a number of
TODOs around for other resource types.

This also includes a straightforward `print` method in `ResourceInfo` to
make the analysis testable. This is deliberately different than the
printer in `lib/Target/DirectX/DXILResource.cpp`, which attempts to
print bindings in a format compatible with the comments `dxc` prints. We
will eventually want to make that functionality driven by this analysis
pass, but it isn't sufficient for testing so we need both.

0 files changed, 0 insertions, 0 deletions