32622b3e6f
Previously, the pinned register (enabled by the `enable_pinned_reg` Cranelift setting and used via the `get_pinned_reg` and `set_pinned_reg` CLIF ops) was only used when Cranelift was embedded in SpiderMonkey, in order to support a pinned heap register. SpiderMonkey has its own calling convention in Cranelift (named after the integration layer, "Baldrdash"). However, the feature is more general, and should be usable with the default system calling convention too, e.g. SysV or Windows Fastcall. This PR fixes the ABI code to properly treat the pinned register as a globally allocated register -- and hence an implicit input and output to every function, not saved/restored in the prologue/epilogue -- for SysV on x86-64 and aarch64, and Fastcall on x86-64. Fixes #4170.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.