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https://github.com/roc-lang/roc.git
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Move repr-specific functions to LayoutRepr and impl deref
This commit is contained in:
Ayaz Hafiz
parent
58fe2bb4e0
commit
7b2d149deb
1 changed files with 101 additions and 85 deletions
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@ -2482,13 +2482,90 @@ impl<'a> Layout<'a> {
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})
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}
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pub fn stack_size_and_alignment_slices<I>(
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interner: &I,
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slices: &[&[InLayout<'a>]],
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target_info: TargetInfo,
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) -> (u32, u32)
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where
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I: LayoutInterner<'a>,
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{
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let mut data_align = 1;
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let mut data_width = 0;
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for tag in slices {
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let mut total = 0;
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for layout in tag.iter() {
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let (stack_size, alignment) = interner
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.get(*layout)
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.stack_size_and_alignment(interner, target_info);
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total += stack_size;
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data_align = data_align.max(alignment);
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}
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data_width = data_width.max(total);
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}
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data_width = round_up_to_alignment(data_width, data_align);
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(data_width, data_align)
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}
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/// Used to build a `Layout::Struct` where the field name order is irrelevant.
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// TODO: to be eliminated once we have SemanticRepr playing a role.
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pub fn struct_no_name_order(field_layouts: &'a [InLayout]) -> Self {
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if field_layouts.is_empty() {
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Self::UNIT_NAKED
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} else {
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Self {
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repr: LayoutRepr::Struct {
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field_layouts,
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field_order_hash: FieldOrderHash::IRRELEVANT_NON_ZERO_FIELD_HASH,
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},
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semantic: SemanticRepr::None,
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}
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}
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}
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pub fn runtime_representation<I>(&self, interner: &I) -> Self
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where
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match self.repr {
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LambdaSet(lambda_set) => interner.get(lambda_set.runtime_representation()),
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_ => *self,
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}
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}
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pub fn runtime_representation_in<I>(layout: InLayout<'a>, interner: &I) -> InLayout<'a>
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where
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match interner.get(layout).repr {
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LambdaSet(lambda_set) => lambda_set.runtime_representation(),
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_ => layout,
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}
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}
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}
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impl<'a> std::ops::Deref for Layout<'a> {
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type Target = LayoutRepr<'a>;
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fn deref(&self) -> &Self::Target {
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&self.repr
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}
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}
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impl<'a> LayoutRepr<'a> {
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pub fn safe_to_memcpy<I>(&self, interner: &I) -> bool
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where
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match self.repr {
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match self {
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Builtin(builtin) => builtin.safe_to_memcpy(),
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Struct { field_layouts, .. } => field_layouts
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.iter()
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@ -2532,7 +2609,7 @@ impl<'a> Layout<'a> {
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where
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I: LayoutInterner<'a>,
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{
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match self.repr {
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match self {
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LayoutRepr::Builtin(builtin) => {
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use Builtin::*;
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@ -2583,12 +2660,12 @@ impl<'a> Layout<'a> {
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{
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use LayoutRepr::*;
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match self.repr {
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match self {
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Builtin(builtin) => builtin.stack_size(target_info),
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Struct { field_layouts, .. } => {
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let mut sum = 0;
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for field_layout in field_layouts {
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for field_layout in *field_layouts {
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sum += interner
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.get(*field_layout)
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.stack_size(interner, target_info);
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@ -2610,7 +2687,7 @@ impl<'a> Layout<'a> {
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match self.repr {
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match self {
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Struct { field_layouts, .. } => field_layouts
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.iter()
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.map(|x| interner.get(*x).alignment_bytes(interner, target_info))
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@ -2665,7 +2742,7 @@ impl<'a> Layout<'a> {
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let ptr_width = target_info.ptr_width() as u32;
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use LayoutRepr::*;
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match self.repr {
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match self {
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Builtin(builtin) => builtin.allocation_alignment_bytes(interner, target_info),
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Struct { .. } => self.alignment_bytes(interner, target_info).max(ptr_width),
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Union(union_layout) => union_layout.allocation_alignment_bytes(interner, target_info),
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@ -2677,45 +2754,16 @@ impl<'a> Layout<'a> {
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}
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Boxed(inner) => Ord::max(
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ptr_width,
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interner.get(inner).alignment_bytes(interner, target_info),
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interner.get(*inner).alignment_bytes(interner, target_info),
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),
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}
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}
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pub fn stack_size_and_alignment_slices<I>(
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interner: &I,
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slices: &[&[InLayout<'a>]],
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target_info: TargetInfo,
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) -> (u32, u32)
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where
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I: LayoutInterner<'a>,
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{
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let mut data_align = 1;
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let mut data_width = 0;
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for tag in slices {
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let mut total = 0;
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for layout in tag.iter() {
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let (stack_size, alignment) = interner
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.get(*layout)
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.stack_size_and_alignment(interner, target_info);
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total += stack_size;
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data_align = data_align.max(alignment);
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}
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data_width = data_width.max(total);
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}
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data_width = round_up_to_alignment(data_width, data_align);
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(data_width, data_align)
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}
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pub fn is_refcounted(&self) -> bool {
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use self::Builtin::*;
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use LayoutRepr::*;
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match self.repr {
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match self {
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Union(UnionLayout::NonRecursive(_)) => false,
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Union(_) => true,
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@ -2737,7 +2785,7 @@ impl<'a> Layout<'a> {
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{
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use LayoutRepr::*;
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match self.repr {
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match self {
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Builtin(builtin) => builtin.is_refcounted(),
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Struct { field_layouts, .. } => field_layouts
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.iter()
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@ -2768,13 +2816,13 @@ impl<'a> Layout<'a> {
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where
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I: LayoutInterner<'a>,
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{
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let mut stack: Vec<Layout> = bumpalo::collections::Vec::new_in(arena);
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let mut stack: Vec<LayoutRepr> = bumpalo::collections::Vec::new_in(arena);
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stack.push(self);
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use LayoutRepr::*;
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while let Some(layout) = stack.pop() {
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match layout.repr {
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match layout {
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Builtin(builtin) => {
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use self::Builtin::*;
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match builtin {
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@ -2788,25 +2836,31 @@ impl<'a> Layout<'a> {
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}
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}
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// If there's any layer of indirection (behind a pointer), then it doesn't vary!
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Struct { field_layouts, .. } => {
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stack.extend(field_layouts.iter().map(|interned| interner.get(*interned)))
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}
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Struct { field_layouts, .. } => stack.extend(
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field_layouts
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.iter()
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.map(|interned| interner.get(*interned).repr),
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),
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Union(tag_union) => match tag_union {
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UnionLayout::NonRecursive(tags) | UnionLayout::Recursive(tags) => {
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for tag in tags {
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stack.extend(tag.iter().map(|interned| interner.get(*interned)));
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stack.extend(tag.iter().map(|interned| interner.get(*interned).repr));
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}
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}
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UnionLayout::NonNullableUnwrapped(fields) => {
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stack.extend(fields.iter().map(|interned| interner.get(*interned)));
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stack.extend(fields.iter().map(|interned| interner.get(*interned).repr));
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}
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UnionLayout::NullableWrapped { other_tags, .. } => {
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for tag in other_tags {
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stack.extend(tag.iter().map(|interned| interner.get(*interned)));
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stack.extend(tag.iter().map(|interned| interner.get(*interned).repr));
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}
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}
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UnionLayout::NullableUnwrapped { other_fields, .. } => {
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stack.extend(other_fields.iter().map(|interned| interner.get(*interned)));
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stack.extend(
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other_fields
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.iter()
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.map(|interned| interner.get(*interned).repr),
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);
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}
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},
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LambdaSet(_) => return true,
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@ -2821,44 +2875,6 @@ impl<'a> Layout<'a> {
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false
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}
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/// Used to build a `Layout::Struct` where the field name order is irrelevant.
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// TODO: to be eliminated once we have SemanticRepr playing a role.
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pub fn struct_no_name_order(field_layouts: &'a [InLayout]) -> Self {
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if field_layouts.is_empty() {
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Self::UNIT_NAKED
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} else {
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Self {
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repr: LayoutRepr::Struct {
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field_layouts,
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field_order_hash: FieldOrderHash::IRRELEVANT_NON_ZERO_FIELD_HASH,
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},
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semantic: SemanticRepr::None,
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}
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}
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}
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pub fn runtime_representation<I>(&self, interner: &I) -> Self
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where
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match self.repr {
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LambdaSet(lambda_set) => interner.get(lambda_set.runtime_representation()),
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_ => *self,
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}
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}
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pub fn runtime_representation_in<I>(layout: InLayout<'a>, interner: &I) -> InLayout<'a>
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where
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I: LayoutInterner<'a>,
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{
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use LayoutRepr::*;
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match interner.get(layout).repr {
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LambdaSet(lambda_set) => lambda_set.runtime_representation(),
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_ => layout,
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}
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}
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}
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pub type SeenRecPtrs<'a> = VecSet<InLayout<'a>>;
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