Enum cranelift_codegen::ir::ArgumentLoc [−][src]
Expand description
Function argument location.
The ABI specifies how arguments are passed to a function, and where return values appear after
the call. Just like a ValueLoc
, function arguments can be passed in registers or on the
stack.
Function arguments on the stack are accessed differently for the incoming arguments to the current function and the outgoing arguments to a called external function. For this reason, the location of stack arguments is described as an offset into the array of function arguments on the stack.
An ArgumentLoc
can be translated to a ValueLoc
only when we know if we’re talking about an
incoming argument or an outgoing argument.
- For stack arguments, different
StackSlot
entities are used to represent incoming and outgoing arguments. - For register arguments, there is usually no difference, but if we ever add support for a register-window ISA like SPARC, register arguments would also need to be translated.
Variants
This argument has not been assigned to a location yet.
Argument is passed in a register.
Tuple Fields of Reg
0: RegUnit
Argument is passed on the stack, at the given byte offset into the argument array.
Tuple Fields of Stack
0: i32
Implementations
Is this an assigned location? (That is, not Unassigned
).
Trait Implementations
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for ArgumentLoc
impl Send for ArgumentLoc
impl Sync for ArgumentLoc
impl Unpin for ArgumentLoc
impl UnwindSafe for ArgumentLoc
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.