Support more reference constants in wast scripts (#6865)

Spec tests use constants like `ref.array` and `ref.eq` to assert that
exported function return references of the correct types. Support more
such constants in the wast parser.

Also fix a bug where the interpretation of `array.new_data` for arrays
of packed fields was not properly truncating the packed data. Move the
function for reading fields from memory from literal.cpp to
wasm-interpreter.h, where the function for truncating packed data lives.

Other bugs prevent us from enabling any more spec tests as a result of
this change, but we can get farther through several of them before
failing. Update the comments about the failures accordingly.

0 files changed, 0 insertions, 0 deletions