--emit=[asm|llvm-bc|llvm-ir|obj] not emitting allocator or metadata

[0dvictor]

At present, rustc --emit=[asm|llvm-bc|llvm-ir|obj] only generates artifacts of the regular module but not allocators or metadata.

While working on #64191 , I found such behavior was very confusing as I expected it to output all artifacts I need to generate the final binary. Therefore, I am proposing to make rustc --emit=[asm|llvm-bc|llvm-ir|obj] emits allocators and metadata, in addition to the regular module. For example:

• rustc --emit=llvm-bc foo.rs would outputs foo.bc and foo.allocator.bc [crate-type bin doesn't need metadata]
• rustc --emit=llvm-ir foo.rs --crate-type=dylib would outputs foo.ll, foo.allocator.ll, and foo.metadata.ll

[workingjubilee]

Hmm. I don't believe we use a special allocator anymore...?

[bjorn3]

OP is refering to the allocator shim, which we still use.