--- /dev/null
+use std::convert::TryFrom;
+use std::convert::TryInto;
+
+use gccjit::LValue;
+use gccjit::{Block, CType, RValue, Type, ToRValue};
+use rustc_codegen_ssa::mir::place::PlaceRef;
+use rustc_codegen_ssa::traits::{
+ BaseTypeMethods,
+ ConstMethods,
+ DerivedTypeMethods,
+ MiscMethods,
+ StaticMethods,
+};
+use rustc_middle::mir::Mutability;
+use rustc_middle::ty::ScalarInt;
+use rustc_middle::ty::layout::{TyAndLayout, LayoutOf};
+use rustc_middle::mir::interpret::{Allocation, GlobalAlloc, Scalar};
+use rustc_span::Symbol;
+use rustc_target::abi::{self, HasDataLayout, Pointer, Size};
+
+use crate::consts::const_alloc_to_gcc;
+use crate::context::CodegenCx;
+use crate::type_of::LayoutGccExt;
+
+impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
+ pub fn const_bytes(&self, bytes: &[u8]) -> RValue<'gcc> {
+ bytes_in_context(self, bytes)
+ }
+
+ fn const_cstr(&self, symbol: Symbol, _null_terminated: bool) -> LValue<'gcc> {
+ // TODO(antoyo): handle null_terminated.
+ if let Some(&value) = self.const_cstr_cache.borrow().get(&symbol) {
+ return value;
+ }
+
+ let global = self.global_string(&*symbol.as_str());
+
+ self.const_cstr_cache.borrow_mut().insert(symbol, global);
+ global
+ }
+
+ fn global_string(&self, string: &str) -> LValue<'gcc> {
+ // TODO(antoyo): handle non-null-terminated strings.
+ let string = self.context.new_string_literal(&*string);
+ let sym = self.generate_local_symbol_name("str");
+ let global = self.declare_private_global(&sym, self.val_ty(string));
+ global.global_set_initializer_value(string);
+ global
+ // TODO(antoyo): set linkage.
+ }
+
+ pub fn inttoptr(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
+ let func = block.get_function();
+ let local = func.new_local(None, value.get_type(), "intLocal");
+ block.add_assignment(None, local, value);
+ let value_address = local.get_address(None);
+
+ let ptr = self.context.new_cast(None, value_address, dest_ty.make_pointer());
+ ptr.dereference(None).to_rvalue()
+ }
+
+ pub fn ptrtoint(&self, block: Block<'gcc>, value: RValue<'gcc>, dest_ty: Type<'gcc>) -> RValue<'gcc> {
+ // TODO(antoyo): when libgccjit allow casting from pointer to int, remove this.
+ let func = block.get_function();
+ let local = func.new_local(None, value.get_type(), "ptrLocal");
+ block.add_assignment(None, local, value);
+ let ptr_address = local.get_address(None);
+
+ let ptr = self.context.new_cast(None, ptr_address, dest_ty.make_pointer());
+ ptr.dereference(None).to_rvalue()
+ }
+}
+
+pub fn bytes_in_context<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, bytes: &[u8]) -> RValue<'gcc> {
+ let context = &cx.context;
+ let byte_type = context.new_type::<u8>();
+ let typ = context.new_array_type(None, byte_type, bytes.len() as i32);
+ let elements: Vec<_> =
+ bytes.iter()
+ .map(|&byte| context.new_rvalue_from_int(byte_type, byte as i32))
+ .collect();
+ context.new_rvalue_from_array(None, typ, &elements)
+}
+
+pub fn type_is_pointer<'gcc>(typ: Type<'gcc>) -> bool {
+ typ.get_pointee().is_some()
+}
+
+impl<'gcc, 'tcx> ConstMethods<'tcx> for CodegenCx<'gcc, 'tcx> {
+ fn const_null(&self, typ: Type<'gcc>) -> RValue<'gcc> {
+ if type_is_pointer(typ) {
+ self.context.new_null(typ)
+ }
+ else {
+ self.const_int(typ, 0)
+ }
+ }
+
+ fn const_undef(&self, typ: Type<'gcc>) -> RValue<'gcc> {
+ let local = self.current_func.borrow().expect("func")
+ .new_local(None, typ, "undefined");
+ if typ.is_struct().is_some() {
+ // NOTE: hack to workaround a limitation of the rustc API: see comment on
+ // CodegenCx.structs_as_pointer
+ let pointer = local.get_address(None);
+ self.structs_as_pointer.borrow_mut().insert(pointer);
+ pointer
+ }
+ else {
+ local.to_rvalue()
+ }
+ }
+
+ fn const_int(&self, typ: Type<'gcc>, int: i64) -> RValue<'gcc> {
+ self.context.new_rvalue_from_long(typ, i64::try_from(int).expect("i64::try_from"))
+ }
+
+ fn const_uint(&self, typ: Type<'gcc>, int: u64) -> RValue<'gcc> {
+ self.context.new_rvalue_from_long(typ, u64::try_from(int).expect("u64::try_from") as i64)
+ }
+
+ fn const_uint_big(&self, typ: Type<'gcc>, num: u128) -> RValue<'gcc> {
+ let num64: Result<i64, _> = num.try_into();
+ if let Ok(num) = num64 {
+ // FIXME(antoyo): workaround for a bug where libgccjit is expecting a constant.
+ // The operations >> 64 and | low are making the normal case a non-constant.
+ return self.context.new_rvalue_from_long(typ, num as i64);
+ }
+
+ if num >> 64 != 0 {
+ // FIXME(antoyo): use a new function new_rvalue_from_unsigned_long()?
+ let low = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
+ let high = self.context.new_rvalue_from_long(typ, (num >> 64) as u64 as i64);
+
+ let sixty_four = self.context.new_rvalue_from_long(typ, 64);
+ (high << sixty_four) | self.context.new_cast(None, low, typ)
+ }
+ else if typ.is_i128(self) {
+ let num = self.context.new_rvalue_from_long(self.u64_type, num as u64 as i64);
+ self.context.new_cast(None, num, typ)
+ }
+ else {
+ self.context.new_rvalue_from_long(typ, num as u64 as i64)
+ }
+ }
+
+ fn const_bool(&self, val: bool) -> RValue<'gcc> {
+ self.const_uint(self.type_i1(), val as u64)
+ }
+
+ fn const_i32(&self, i: i32) -> RValue<'gcc> {
+ self.const_int(self.type_i32(), i as i64)
+ }
+
+ fn const_u32(&self, i: u32) -> RValue<'gcc> {
+ self.const_uint(self.type_u32(), i as u64)
+ }
+
+ fn const_u64(&self, i: u64) -> RValue<'gcc> {
+ self.const_uint(self.type_u64(), i)
+ }
+
+ fn const_usize(&self, i: u64) -> RValue<'gcc> {
+ let bit_size = self.data_layout().pointer_size.bits();
+ if bit_size < 64 {
+ // make sure it doesn't overflow
+ assert!(i < (1 << bit_size));
+ }
+
+ self.const_uint(self.usize_type, i)
+ }
+
+ fn const_u8(&self, _i: u8) -> RValue<'gcc> {
+ unimplemented!();
+ }
+
+ fn const_real(&self, _t: Type<'gcc>, _val: f64) -> RValue<'gcc> {
+ unimplemented!();
+ }
+
+ fn const_str(&self, s: Symbol) -> (RValue<'gcc>, RValue<'gcc>) {
+ let len = s.as_str().len();
+ let cs = self.const_ptrcast(self.const_cstr(s, false).get_address(None),
+ self.type_ptr_to(self.layout_of(self.tcx.types.str_).gcc_type(self, true)),
+ );
+ (cs, self.const_usize(len as u64))
+ }
+
+ fn const_struct(&self, values: &[RValue<'gcc>], packed: bool) -> RValue<'gcc> {
+ let fields: Vec<_> = values.iter()
+ .map(|value| value.get_type())
+ .collect();
+ // TODO(antoyo): cache the type? It's anonymous, so probably not.
+ let typ = self.type_struct(&fields, packed);
+ let struct_type = typ.is_struct().expect("struct type");
+ self.context.new_rvalue_from_struct(None, struct_type, values)
+ }
+
+ fn const_to_opt_uint(&self, _v: RValue<'gcc>) -> Option<u64> {
+ // TODO(antoyo)
+ None
+ }
+
+ fn const_to_opt_u128(&self, _v: RValue<'gcc>, _sign_ext: bool) -> Option<u128> {
+ // TODO(antoyo)
+ None
+ }
+
+ fn scalar_to_backend(&self, cv: Scalar, layout: abi::Scalar, ty: Type<'gcc>) -> RValue<'gcc> {
+ let bitsize = if layout.is_bool() { 1 } else { layout.value.size(self).bits() };
+ match cv {
+ Scalar::Int(ScalarInt::ZST) => {
+ assert_eq!(0, layout.value.size(self).bytes());
+ self.const_undef(self.type_ix(0))
+ }
+ Scalar::Int(int) => {
+ let data = int.assert_bits(layout.value.size(self));
+
+ // FIXME(antoyo): there's some issues with using the u128 code that follows, so hard-code
+ // the paths for floating-point values.
+ if ty == self.float_type {
+ return self.context.new_rvalue_from_double(ty, f32::from_bits(data as u32) as f64);
+ }
+ else if ty == self.double_type {
+ return self.context.new_rvalue_from_double(ty, f64::from_bits(data as u64));
+ }
+
+ let value = self.const_uint_big(self.type_ix(bitsize), data);
+ if layout.value == Pointer {
+ self.inttoptr(self.current_block.borrow().expect("block"), value, ty)
+ } else {
+ self.const_bitcast(value, ty)
+ }
+ }
+ Scalar::Ptr(ptr, _size) => {
+ let (alloc_id, offset) = ptr.into_parts();
+ let base_addr =
+ match self.tcx.global_alloc(alloc_id) {
+ GlobalAlloc::Memory(alloc) => {
+ let init = const_alloc_to_gcc(self, alloc);
+ let value =
+ match alloc.mutability {
+ Mutability::Mut => self.static_addr_of_mut(init, alloc.align, None),
+ _ => self.static_addr_of(init, alloc.align, None),
+ };
+ if !self.sess().fewer_names() {
+ // TODO(antoyo): set value name.
+ }
+ value
+ },
+ GlobalAlloc::Function(fn_instance) => {
+ self.get_fn_addr(fn_instance)
+ },
+ GlobalAlloc::Static(def_id) => {
+ assert!(self.tcx.is_static(def_id));
+ self.get_static(def_id).get_address(None)
+ },
+ };
+ let ptr_type = base_addr.get_type();
+ let base_addr = self.const_bitcast(base_addr, self.usize_type);
+ let offset = self.context.new_rvalue_from_long(self.usize_type, offset.bytes() as i64);
+ let ptr = self.const_bitcast(base_addr + offset, ptr_type);
+ if layout.value != Pointer {
+ self.const_bitcast(ptr.dereference(None).to_rvalue(), ty)
+ }
+ else {
+ self.const_bitcast(ptr, ty)
+ }
+ }
+ }
+ }
+
+ fn const_data_from_alloc(&self, alloc: &Allocation) -> Self::Value {
+ const_alloc_to_gcc(self, alloc)
+ }
+
+ fn from_const_alloc(&self, layout: TyAndLayout<'tcx>, alloc: &Allocation, offset: Size) -> PlaceRef<'tcx, RValue<'gcc>> {
+ assert_eq!(alloc.align, layout.align.abi);
+ let ty = self.type_ptr_to(layout.gcc_type(self, true));
+ let value =
+ if layout.size == Size::ZERO {
+ let value = self.const_usize(alloc.align.bytes());
+ self.context.new_cast(None, value, ty)
+ }
+ else {
+ let init = const_alloc_to_gcc(self, alloc);
+ let base_addr = self.static_addr_of(init, alloc.align, None);
+
+ let array = self.const_bitcast(base_addr, self.type_i8p());
+ let value = self.context.new_array_access(None, array, self.const_usize(offset.bytes())).get_address(None);
+ self.const_bitcast(value, ty)
+ };
+ PlaceRef::new_sized(value, layout)
+ }
+
+ fn const_ptrcast(&self, val: RValue<'gcc>, ty: Type<'gcc>) -> RValue<'gcc> {
+ self.context.new_cast(None, val, ty)
+ }
+}
+
+pub trait SignType<'gcc, 'tcx> {
+ fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
+ fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc>;
+}
+
+impl<'gcc, 'tcx> SignType<'gcc, 'tcx> for Type<'gcc> {
+ fn is_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.is_i8(cx) || self.is_i16(cx) || self.is_i32(cx) || self.is_i64(cx) || self.is_i128(cx)
+ }
+
+ fn is_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.is_u8(cx) || self.is_u16(cx) || self.is_u32(cx) || self.is_u64(cx) || self.is_u128(cx)
+ }
+
+ fn to_signed(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
+ if self.is_u8(cx) {
+ cx.i8_type
+ }
+ else if self.is_u16(cx) {
+ cx.i16_type
+ }
+ else if self.is_u32(cx) {
+ cx.i32_type
+ }
+ else if self.is_u64(cx) {
+ cx.i64_type
+ }
+ else if self.is_u128(cx) {
+ cx.i128_type
+ }
+ else {
+ self.clone()
+ }
+ }
+
+ fn to_unsigned(&self, cx: &CodegenCx<'gcc, 'tcx>) -> Type<'gcc> {
+ if self.is_i8(cx) {
+ cx.u8_type
+ }
+ else if self.is_i16(cx) {
+ cx.u16_type
+ }
+ else if self.is_i32(cx) {
+ cx.u32_type
+ }
+ else if self.is_i64(cx) {
+ cx.u64_type
+ }
+ else if self.is_i128(cx) {
+ cx.u128_type
+ }
+ else {
+ self.clone()
+ }
+ }
+}
+
+pub trait TypeReflection<'gcc, 'tcx> {
+ fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+
+ fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+
+ fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+ fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool;
+}
+
+impl<'gcc, 'tcx> TypeReflection<'gcc, 'tcx> for Type<'gcc> {
+ fn is_uchar(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u8_type
+ }
+
+ fn is_ushort(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u16_type
+ }
+
+ fn is_uint(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.uint_type
+ }
+
+ fn is_ulong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.ulong_type
+ }
+
+ fn is_ulonglong(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.ulonglong_type
+ }
+
+ fn is_i8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.i8_type
+ }
+
+ fn is_u8(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u8_type
+ }
+
+ fn is_i16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.i16_type
+ }
+
+ fn is_u16(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u16_type
+ }
+
+ fn is_i32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.i32_type
+ }
+
+ fn is_u32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u32_type
+ }
+
+ fn is_i64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.i64_type
+ }
+
+ fn is_u64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.u64_type
+ }
+
+ fn is_i128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.context.new_c_type(CType::Int128t)
+ }
+
+ fn is_u128(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.context.new_c_type(CType::UInt128t)
+ }
+
+ fn is_f32(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.context.new_type::<f32>()
+ }
+
+ fn is_f64(&self, cx: &CodegenCx<'gcc, 'tcx>) -> bool {
+ self.unqualified() == cx.context.new_type::<f64>()
+ }
+}
projects / rustc.git / blobdiff