e8f772c1ac
Previously, in #2128, we factored out a common "vanilla 64-bit ABI" implementation from the AArch64 ABI code, with the idea that this should be largely compatible with x64. This PR alters the new x64 backend to make use of the shared infrastructure, removing the duplication that existed previously. The generated code is nearly (not exactly) the same; the only difference relates to how the clobber-save region is padded in the prologue. This also changes some register allocations in the aarch64 code because call support in the shared ABI infra now passes a temp vreg in, rather than requiring use of a fixed, non-allocable temp; tests have been updated, and the runtime behavior is unchanged.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.