Enum cretonne_codegen::ir::ArgumentLoc
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pub enum ArgumentLoc { Unassigned, Reg(RegUnit), Stack(i32), }
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
Unassigned
This argument has not been assigned to a location yet.
Reg(RegUnit)
Argument is passed in a register.
Stack(i32)
Argument is passed on the stack, at the given byte offset into the argument array.
Methods
impl ArgumentLoc
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pub fn is_assigned(&self) -> bool
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Is this an assigned location? (That is, not Unassigned
).
pub fn is_reg(&self) -> bool
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Is this a register location?
pub fn is_stack(&self) -> bool
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Is this a stack location?
pub fn display<'a, R: Into<Option<&'a RegInfo>>>(
self,
regs: R
) -> DisplayArgumentLoc<'a>
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self,
regs: R
) -> DisplayArgumentLoc<'a>
Return an object that can display this argument location, using the register info from the target ISA.
Trait Implementations
impl Copy for ArgumentLoc
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impl Clone for ArgumentLoc
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fn clone(&self) -> ArgumentLoc
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
Performs copy-assignment from source
. Read more
impl Debug for ArgumentLoc
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Eq for ArgumentLoc
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impl PartialEq for ArgumentLoc
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fn eq(&self, __arg_0: &ArgumentLoc) -> bool
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This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &ArgumentLoc) -> bool
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This method tests for !=
.
impl Hash for ArgumentLoc
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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
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Feeds this value into the given [Hasher
]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher
]. Read more