Refactorings for enabling parallel compilation (part 1) #1264
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The new codegen_and_compile_fn function only calls codegen_fn and then compile_fn. This makes it possible for both parts to be called separately by the driver.
This allows it to be executed on a background thread.
The allocator shim doesn't get reused and the allocator shim is just under 2kb, so reusing it is likely more expensive than regenerating it.
This reduces memory usage and may improve performance slightly.
The copy depends on Session, which is only available on the main thread. As such the copy can't be done on future codegen threads.
Error reporting requires a Session, which isn't available on background threads.
TyCtxt isn't available on background threads.
bjorn3
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bjorn3
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This was referenced Aug 13, 2022
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This PR contains a bunch of refactorings to remove dependencies on TyCtxt and Session for various functions that will in the future be called on background threads as those types are only available on the main thread.
While I was working on this refactoring I also managed to remove the partial linking hack previously necessary for allowing incremental compilation and inline assembly to work together. This fixes support for inline assembly on macOS. cc #1204
Part of #652
See #1266 for the next PR in this series.