Implement TRAMPOLINE-STACK-SIZE
Implement TRAMPOLINE-STACK-REF
TRAMPOLINE-STACK-REF rejects negative stack indices
TRAMPOLINE-STACK-REF checks index upper bound
Kill STACK-SIZE/INTERNAL
TRAMPOLINE-ALLOCATE will use the stack for a large parameter
TRAMPOLINE-ALLOCATE can handle multiple stack parameters
Extract SET-STACK
TRAMPOLINE-ALLOCATE overflows from registers to stack
Extract NUMBER-OF-WORDS-HAVING-TYPE
Extract *TRAMPOLINE-GP-COUNT* and *TRAMPOLINE-SSE-COUNT*
STORE-IN-REGISTERS? -> ENOUGH-REGISTERS?
Extract STORE-PARAMETER/REGISTERS
ENOUGH-REGISTERS? -> OK-FOR-REGISTERS?
SET-STACK -> WRITE-STACK-TO-TRAMPOLINE
TRAMPOLINE-ALLOCATE spills SSE words onto stack