Struct cranelift_codegen::ir::RelSourceLoc

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pub struct RelSourceLoc(_);

Expand description

Source location relative to another base source location.

Implementations§

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impl RelSourceLoc

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pub fn new(bits: u32) -> Self

Create a new relative source location with the given bits.

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pub fn from_base_offset(base: SourceLoc, offset: SourceLoc) -> Self

Creates a new RelSourceLoc based on the given base and offset.

Panics

Panics if the offset is smaller than the base.

Examples found in repository ?

src/ir/function.rs (line 492)

    pub fn set_srcloc(&mut self, inst: Inst, srcloc: SourceLoc) {
        let base = self.params.ensure_base_srcloc(srcloc);
        self.stencil.srclocs[inst] = RelSourceLoc::from_base_offset(base, srcloc);
    }

More examples

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src/legalizer/heap.rs (line 401)

fn cast_index_to_pointer_ty(
    index: ir::Value,
    index_ty: ir::Type,
    pointer_ty: ir::Type,
    pos: &mut FuncCursor,
) -> ir::Value {
    if index_ty == pointer_ty {
        return index;
    }
    // Note that using 64-bit heaps on a 32-bit host is not currently supported,
    // would require at least a bounds check here to ensure that the truncation
    // from 64-to-32 bits doesn't lose any upper bits. For now though we're
    // mostly interested in the 32-bit-heaps-on-64-bit-hosts cast.
    assert!(index_ty.bits() < pointer_ty.bits());

    // Convert `index` to `addr_ty`.
    let extended_index = pos.ins().uextend(pointer_ty, index);

    // Add debug value-label alias so that debuginfo can name the extended
    // value as the address
    let loc = pos.srcloc();
    let loc = RelSourceLoc::from_base_offset(pos.func.params.base_srcloc(), loc);
    pos.func
        .stencil
        .dfg
        .add_value_label_alias(extended_index, loc, index);

    extended_index
}

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pub fn expand(&self, base: SourceLoc) -> SourceLoc

Expands the relative source location into an absolute one, using the given base.

Examples found in repository ?

src/ir/function.rs (line 498)

    pub fn srcloc(&self, inst: Inst) -> SourceLoc {
        let base = self.params.base_srcloc();
        self.stencil.srclocs[inst].expand(base)
    }

More examples

Hide additional examples

src/machinst/buffer.rs (line 1557)

    fn apply_params(self, params: &FunctionParameters) -> MachSrcLoc<Final> {
        MachSrcLoc {
            start: self.start,
            end: self.end,
            loc: self.loc.expand(params.base_srcloc()),
        }
    }

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pub fn is_default(self) -> bool

Is this the default relative source location?

Examples found in repository ?

src/ir/sourceloc.rs (line 80)

    pub fn expand(&self, base: SourceLoc) -> SourceLoc {
        if self.is_default() || base.is_default() {
            Default::default()
        } else {
            SourceLoc::new(self.0.wrapping_add(base.bits()))
        }
    }

    /// Is this the default relative source location?
    pub fn is_default(self) -> bool {
        self == Default::default()
    }
}

impl Default for RelSourceLoc {
    fn default() -> Self {
        Self(!0)
    }
}

impl fmt::Display for RelSourceLoc {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        if self.is_default() {
            write!(f, "@-")
        } else {
            write!(f, "@+{:04x}", self.0)
        }
    }