forked from M-Labs/nac3
core: remove List proxy
This commit is contained in:
parent
d2650e6979
commit
7e45c104be
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@ -1,11 +1,10 @@
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use crate::codegen::{CodeGenContext, CodeGenerator};
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use inkwell::context::Context;
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use inkwell::types::{BasicType, StructType};
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use inkwell::values::{BasicValue, StructValue};
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use inkwell::types::BasicType;
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use inkwell::values::BasicValue;
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use inkwell::{
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types::{AnyTypeEnum, BasicTypeEnum, IntType, PointerType},
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types::AnyTypeEnum,
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values::{BasicValueEnum, IntValue, PointerValue},
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AddressSpace, IntPredicate,
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IntPredicate,
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};
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/// A LLVM type that is used to represent a non-primitive type in NAC3.
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@ -502,374 +501,3 @@ impl<'ctx> ArrayLikeIndexer<'ctx> for ArraySliceValue<'ctx> {
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impl<'ctx> UntypedArrayLikeAccessor<'ctx> for ArraySliceValue<'ctx> {}
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impl<'ctx> UntypedArrayLikeMutator<'ctx> for ArraySliceValue<'ctx> {}
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/// Proxy type for a `list` type in LLVM.
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#[derive(Debug, PartialEq, Eq, Clone, Copy)]
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pub struct ListType<'ctx> {
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ty: PointerType<'ctx>,
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llvm_usize: IntType<'ctx>,
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}
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impl<'ctx> ListType<'ctx> {
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/// Checks whether `llvm_ty` represents a `list` type, returning [Err] if it does not.
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pub fn is_type(llvm_ty: PointerType<'ctx>, llvm_usize: IntType<'ctx>) -> Result<(), String> {
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let llvm_list_ty = llvm_ty.get_element_type();
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let AnyTypeEnum::StructType(llvm_list_ty) = llvm_list_ty else {
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return Err(format!("Expected struct type for `list` type, got {llvm_list_ty}"));
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};
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if llvm_list_ty.count_fields() != 2 {
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return Err(format!(
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"Expected 2 fields in `list`, got {}",
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llvm_list_ty.count_fields()
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));
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}
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let list_size_ty = llvm_list_ty.get_field_type_at_index(0).unwrap();
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let Ok(_) = PointerType::try_from(list_size_ty) else {
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return Err(format!("Expected pointer type for `list.0`, got {list_size_ty}"));
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};
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let list_data_ty = llvm_list_ty.get_field_type_at_index(1).unwrap();
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let Ok(list_data_ty) = IntType::try_from(list_data_ty) else {
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return Err(format!("Expected int type for `list.1`, got {list_data_ty}"));
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};
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if list_data_ty.get_bit_width() != llvm_usize.get_bit_width() {
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return Err(format!(
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"Expected {}-bit int type for `list.1`, got {}-bit int",
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llvm_usize.get_bit_width(),
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list_data_ty.get_bit_width()
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));
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}
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Ok(())
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}
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/// Creates an instance of [`ListType`].
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#[must_use]
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pub fn new<G: CodeGenerator + ?Sized>(
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generator: &G,
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ctx: &'ctx Context,
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element_type: BasicTypeEnum<'ctx>,
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) -> Self {
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let llvm_usize = generator.get_size_type(ctx);
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let llvm_list = ctx
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.struct_type(
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&[element_type.ptr_type(AddressSpace::default()).into(), llvm_usize.into()],
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false,
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)
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.ptr_type(AddressSpace::default());
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ListType::from_type(llvm_list, llvm_usize)
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}
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/// Creates an [`ListType`] from a [`PointerType`].
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#[must_use]
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pub fn from_type(ptr_ty: PointerType<'ctx>, llvm_usize: IntType<'ctx>) -> Self {
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debug_assert!(Self::is_type(ptr_ty, llvm_usize).is_ok());
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ListType { ty: ptr_ty, llvm_usize }
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}
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/// Returns the type of the `size` field of this `list` type.
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#[must_use]
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pub fn size_type(&self) -> IntType<'ctx> {
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self.as_base_type()
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.get_element_type()
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.into_struct_type()
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.get_field_type_at_index(1)
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.map(BasicTypeEnum::into_int_type)
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.unwrap()
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}
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/// Returns the element type of this `list` type.
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#[must_use]
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pub fn element_type(&self) -> AnyTypeEnum<'ctx> {
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self.as_base_type()
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.get_element_type()
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.into_struct_type()
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.get_field_type_at_index(0)
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.map(BasicTypeEnum::into_pointer_type)
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.map(PointerType::get_element_type)
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.unwrap()
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}
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}
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impl<'ctx> ProxyType<'ctx> for ListType<'ctx> {
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type Base = PointerType<'ctx>;
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type Underlying = StructType<'ctx>;
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type Value = ListValue<'ctx>;
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fn new_value<G: CodeGenerator + ?Sized>(
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&self,
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, '_>,
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name: Option<&'ctx str>,
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) -> Self::Value {
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self.create_value(
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generator.gen_var_alloc(ctx, self.as_underlying_type().into(), name).unwrap(),
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name,
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)
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}
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fn create_value(
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&self,
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value: <Self::Value as ProxyValue<'ctx>>::Base,
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name: Option<&'ctx str>,
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) -> Self::Value {
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debug_assert_eq!(value.get_type(), self.as_base_type());
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ListValue { value, llvm_usize: self.llvm_usize, name }
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}
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fn as_base_type(&self) -> Self::Base {
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self.ty
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}
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fn as_underlying_type(&self) -> Self::Underlying {
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self.as_base_type().get_element_type().into_struct_type()
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}
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}
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impl<'ctx> From<ListType<'ctx>> for PointerType<'ctx> {
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fn from(value: ListType<'ctx>) -> Self {
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value.as_base_type()
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}
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}
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/// Proxy type for accessing a `list` value in LLVM.
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#[derive(Copy, Clone)]
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pub struct ListValue<'ctx> {
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value: PointerValue<'ctx>,
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llvm_usize: IntType<'ctx>,
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name: Option<&'ctx str>,
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}
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impl<'ctx> ListValue<'ctx> {
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/// Checks whether `value` is an instance of `list`, returning [Err] if `value` is not an
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/// instance.
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pub fn is_instance(value: PointerValue<'ctx>, llvm_usize: IntType<'ctx>) -> Result<(), String> {
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ListType::is_type(value.get_type(), llvm_usize)
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}
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/// Creates an [`ListValue`] from a [`PointerValue`].
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#[must_use]
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pub fn from_ptr_val(
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ptr: PointerValue<'ctx>,
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llvm_usize: IntType<'ctx>,
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name: Option<&'ctx str>,
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) -> Self {
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debug_assert!(Self::is_instance(ptr, llvm_usize).is_ok());
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<Self as ProxyValue<'ctx>>::Type::from_type(ptr.get_type(), llvm_usize)
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.create_value(ptr, name)
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}
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/// Returns the double-indirection pointer to the `data` array, as if by calling `getelementptr`
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/// on the field.
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fn pptr_to_data(&self, ctx: &CodeGenContext<'ctx, '_>) -> PointerValue<'ctx> {
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let llvm_i32 = ctx.ctx.i32_type();
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let var_name = self.name.map(|v| format!("{v}.data.addr")).unwrap_or_default();
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unsafe {
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ctx.builder
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.build_in_bounds_gep(
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self.as_base_value(),
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&[llvm_i32.const_zero(), llvm_i32.const_zero()],
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var_name.as_str(),
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)
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.unwrap()
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}
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}
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/// Returns the pointer to the field storing the size of this `list`.
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fn ptr_to_size(&self, ctx: &CodeGenContext<'ctx, '_>) -> PointerValue<'ctx> {
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let llvm_i32 = ctx.ctx.i32_type();
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let var_name = self.name.map(|v| format!("{v}.size.addr")).unwrap_or_default();
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unsafe {
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ctx.builder
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.build_in_bounds_gep(
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self.as_base_value(),
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&[llvm_i32.const_zero(), llvm_i32.const_int(1, true)],
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var_name.as_str(),
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)
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.unwrap()
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}
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}
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/// Stores the array of data elements `data` into this instance.
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fn store_data(&self, ctx: &CodeGenContext<'ctx, '_>, data: PointerValue<'ctx>) {
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ctx.builder.build_store(self.pptr_to_data(ctx), data).unwrap();
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}
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/// Convenience method for creating a new array storing data elements with the given element
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/// type `elem_ty` and `size`.
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///
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/// If `size` is [None], the size stored in the field of this instance is used instead.
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pub fn create_data(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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elem_ty: BasicTypeEnum<'ctx>,
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size: Option<IntValue<'ctx>>,
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) {
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let size = size.unwrap_or_else(|| self.load_size(ctx, None));
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let data = ctx
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.builder
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.build_select(
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ctx.builder
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.build_int_compare(IntPredicate::NE, size, self.llvm_usize.const_zero(), "")
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.unwrap(),
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ctx.builder.build_array_alloca(elem_ty, size, "").unwrap(),
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elem_ty.ptr_type(AddressSpace::default()).const_zero(),
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"",
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)
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.map(BasicValueEnum::into_pointer_value)
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.unwrap();
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self.store_data(ctx, data);
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}
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/// Returns the double-indirection pointer to the `data` array, as if by calling `getelementptr`
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/// on the field.
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#[must_use]
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pub fn data(&self) -> ListDataProxy<'ctx, '_> {
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ListDataProxy(self)
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}
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/// Stores the `size` of this `list` into this instance.
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pub fn store_size<G: CodeGenerator + ?Sized>(
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&self,
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ctx: &CodeGenContext<'ctx, '_>,
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generator: &G,
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size: IntValue<'ctx>,
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) {
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debug_assert_eq!(size.get_type(), generator.get_size_type(ctx.ctx));
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let psize = self.ptr_to_size(ctx);
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ctx.builder.build_store(psize, size).unwrap();
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}
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/// Returns the size of this `list` as a value.
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pub fn load_size(&self, ctx: &CodeGenContext<'ctx, '_>, name: Option<&str>) -> IntValue<'ctx> {
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let psize = self.ptr_to_size(ctx);
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let var_name = name
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.map(ToString::to_string)
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.or_else(|| self.name.map(|v| format!("{v}.size")))
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.unwrap_or_default();
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ctx.builder
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.build_load(psize, var_name.as_str())
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.map(BasicValueEnum::into_int_value)
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.unwrap()
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}
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}
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impl<'ctx> ProxyValue<'ctx> for ListValue<'ctx> {
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type Base = PointerValue<'ctx>;
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type Underlying = StructValue<'ctx>;
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type Type = ListType<'ctx>;
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fn get_type(&self) -> Self::Type {
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ListType::from_type(self.as_base_value().get_type(), self.llvm_usize)
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}
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fn as_base_value(&self) -> Self::Base {
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self.value
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}
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fn as_underlying_value(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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name: Option<&'ctx str>,
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) -> Self::Underlying {
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ctx.builder
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.build_load(self.as_base_value(), name.unwrap_or_default())
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.map(BasicValueEnum::into_struct_value)
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.unwrap()
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}
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}
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impl<'ctx> From<ListValue<'ctx>> for PointerValue<'ctx> {
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fn from(value: ListValue<'ctx>) -> Self {
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value.as_base_value()
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}
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}
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/// Proxy type for accessing the `data` array of an `list` instance in LLVM.
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#[derive(Copy, Clone)]
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pub struct ListDataProxy<'ctx, 'a>(&'a ListValue<'ctx>);
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impl<'ctx> ArrayLikeValue<'ctx> for ListDataProxy<'ctx, '_> {
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fn element_type<G: CodeGenerator + ?Sized>(
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&self,
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_: &CodeGenContext<'ctx, '_>,
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_: &G,
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) -> AnyTypeEnum<'ctx> {
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self.0.value.get_type().get_element_type()
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}
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fn base_ptr<G: CodeGenerator + ?Sized>(
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&self,
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ctx: &CodeGenContext<'ctx, '_>,
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_: &G,
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) -> PointerValue<'ctx> {
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let var_name = self.0.name.map(|v| format!("{v}.data")).unwrap_or_default();
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ctx.builder
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.build_load(self.0.pptr_to_data(ctx), var_name.as_str())
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.map(BasicValueEnum::into_pointer_value)
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.unwrap()
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}
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fn size<G: CodeGenerator + ?Sized>(
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&self,
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ctx: &CodeGenContext<'ctx, '_>,
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_: &G,
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) -> IntValue<'ctx> {
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self.0.load_size(ctx, None)
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}
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}
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impl<'ctx> ArrayLikeIndexer<'ctx> for ListDataProxy<'ctx, '_> {
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unsafe fn ptr_offset_unchecked<G: CodeGenerator + ?Sized>(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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generator: &mut G,
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idx: &IntValue<'ctx>,
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name: Option<&str>,
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) -> PointerValue<'ctx> {
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let var_name = name.map(|v| format!("{v}.addr")).unwrap_or_default();
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unsafe {
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ctx.builder
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.build_in_bounds_gep(self.base_ptr(ctx, generator), &[*idx], var_name.as_str())
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.unwrap()
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}
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}
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fn ptr_offset<G: CodeGenerator + ?Sized>(
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&self,
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ctx: &mut CodeGenContext<'ctx, '_>,
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generator: &mut G,
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idx: &IntValue<'ctx>,
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name: Option<&str>,
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) -> PointerValue<'ctx> {
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debug_assert_eq!(idx.get_type(), generator.get_size_type(ctx.ctx));
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let size = self.size(ctx, generator);
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let in_range = ctx.builder.build_int_compare(IntPredicate::ULT, *idx, size, "").unwrap();
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ctx.make_assert(
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generator,
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in_range,
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"0:IndexError",
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"list index out of range",
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[None, None, None],
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ctx.current_loc,
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);
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unsafe { self.ptr_offset_unchecked(ctx, generator, idx, name) }
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}
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}
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impl<'ctx> UntypedArrayLikeAccessor<'ctx> for ListDataProxy<'ctx, '_> {}
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impl<'ctx> UntypedArrayLikeMutator<'ctx> for ListDataProxy<'ctx, '_> {}
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|
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