ee76e01efc
The pinned register hack didn't work because the GetPinnedReg is marked as having side-effects, so that GVN wouldn't try to common it out. This commit tweaks the function used during lowering to vcode, so that the GetPinnedReg opcode is specially handled. It's a bit lame, but it makes the hack work again. Also, use_input needs to be a no-op for real registers.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.