c9bc4edd08
The ABI common code currently passes the fixed frame size to the gen_clobber_save back-end routine, which is required to emit code to allocate the required stack space in the prologue. Similarly, the back-end needs to emit code to de-allocate the stack in the epilogue. However, at this point the back-end does not have access to that fixed frame size value any more. With targets that use a frame pointer, this does not matter, since de-allocation can be done simply by assigning the frame pointer back to the stack pointer. However, on targets that do not use a frame pointer, the frame size is required. To allow back-ends that option, this patch changes ABI common code to pass the fixed frame size to get_clobber_restore as well (the same value as is passed to get_clobber_save).
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.