use crate::prelude::*;
-pub fn trans_fn<'a, 'clif, 'tcx: 'a, B: Backend + 'static>(
+pub fn trans_fn<'clif, 'tcx, B: Backend + 'static>(
cx: &mut crate::CodegenCx<'clif, 'tcx, B>,
instance: Instance<'tcx>,
linkage: Linkage,
let mut debug_context = cx
.debug_context
.as_mut()
- .map(|debug_context| FunctionDebugContext::new(tcx, debug_context, mir, &name, &sig));
+ .map(|debug_context| FunctionDebugContext::new(tcx, debug_context, mir, func_id, &name, &sig));
// Make FunctionBuilder
let mut func = Function::with_name_signature(ExternalName::user(0, 0), sig);
local_map: HashMap::new(),
clif_comments,
- constants: &mut cx.ccx,
+ constants_cx: &mut cx.constants_cx,
caches: &mut cx.caches,
source_info_set: indexmap::IndexSet::new(),
};
- with_unimpl_span(fx.mir.span, || {
- crate::abi::codegen_fn_prelude(&mut fx, start_ebb);
- codegen_fn_content(&mut fx);
- });
+ crate::abi::codegen_fn_prelude(&mut fx, start_ebb);
+ codegen_fn_content(&mut fx);
// Recover all necessary data from fx, before accessing func will prevent future access to it.
let instance = fx.instance;
// Define function
let context = &mut cx.caches.context;
context.func = func;
- cx.module
- .define_function(func_id, context)
- .unwrap();
+ cx.module.define_function(func_id, context).unwrap();
- let value_ranges = context.build_value_labels_ranges(cx.module.isa()).expect("value location ranges");
+ let value_ranges = context
+ .build_value_labels_ranges(cx.module.isa())
+ .expect("value location ranges");
// Write optimized function to file for debugging
#[cfg(debug_assertions)]
- crate::pretty_clif::write_clif_file(cx.tcx, "opt", instance, &context.func, &clif_comments, Some(&value_ranges));
+ crate::pretty_clif::write_clif_file(
+ cx.tcx,
+ "opt",
+ instance,
+ &context.func,
+ &clif_comments,
+ Some(&value_ranges),
+ );
// Define debuginfo for function
let isa = cx.module.isa();
}
}
-fn codegen_fn_content<'a, 'tcx: 'a>(fx: &mut FunctionCx<'a, 'tcx, impl Backend>) {
+fn codegen_fn_content(fx: &mut FunctionCx<'_, '_, impl Backend>) {
for (bb, bb_data) in fx.mir.basic_blocks().iter_enumerated() {
if bb_data.is_cleanup {
// Unwinding after panicking is not supported
target,
cleanup: _,
} => {
+ if !fx.tcx.sess.overflow_checks() {
+ if let mir::interpret::PanicInfo::OverflowNeg = *msg {
+ let target = fx.get_ebb(*target);
+ fx.bcx.ins().jump(target, &[]);
+ continue;
+ }
+ }
let cond = trans_operand(fx, cond).load_scalar(fx);
// TODO HACK brz/brnz for i8/i16 is not yet implemented
let cond = fx.bcx.ins().uextend(types::I32, cond);
} else {
fx.bcx.ins().brz(cond, target, &[]);
};
- trap_panic(fx, format!("[panic] Assert {:?} at {:?} failed.", msg, bb_data.terminator().source_info.span));
+ trap_panic(
+ fx,
+ format!(
+ "[panic] Assert {:?} at {:?} failed.",
+ msg,
+ bb_data.terminator().source_info.span
+ ),
+ );
}
TerminatorKind::SwitchInt {
cleanup: _,
from_hir_call: _,
} => {
- crate::abi::codegen_terminator_call(fx, func, args, destination);
+ crate::abi::codegen_terminator_call(
+ fx,
+ func,
+ args,
+ destination,
+ bb_data.terminator().source_info.span,
+ );
}
TerminatorKind::Resume | TerminatorKind::Abort => {
trap_unreachable(fx, "[corruption] Unwinding bb reached.");
fx.bcx.finalize();
}
-fn trans_stmt<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+fn trans_stmt<'tcx>(
+ fx: &mut FunctionCx<'_, 'tcx, impl Backend>,
cur_ebb: Ebb,
stmt: &Statement<'tcx>,
) {
variant_index,
} => {
let place = trans_place(fx, place);
- let layout = place.layout();
- if layout.for_variant(&*fx, *variant_index).abi == layout::Abi::Uninhabited {
- return;
- }
- match layout.variants {
- layout::Variants::Single { index } => {
- assert_eq!(index, *variant_index);
- }
- layout::Variants::Multiple {
- discr: _,
- discr_index,
- discr_kind: layout::DiscriminantKind::Tag,
- variants: _,
- } => {
- let ptr = place.place_field(fx, mir::Field::new(discr_index));
- let to = layout
- .ty
- .discriminant_for_variant(fx.tcx, *variant_index)
- .unwrap()
- .val;
- let discr = CValue::const_val(fx, ptr.layout().ty, to);
- ptr.write_cvalue(fx, discr);
- }
- layout::Variants::Multiple {
- discr: _,
- discr_index,
- discr_kind: layout::DiscriminantKind::Niche {
- dataful_variant,
- ref niche_variants,
- niche_start,
- },
- variants: _,
- } => {
- if *variant_index != dataful_variant {
- let niche = place.place_field(fx, mir::Field::new(discr_index));
- //let niche_llty = niche.layout.immediate_llvm_type(bx.cx);
- let niche_value =
- ((variant_index.as_u32() - niche_variants.start().as_u32()) as u128)
- .wrapping_add(niche_start);
- // FIXME(eddyb) Check the actual primitive type here.
- let niche_llval = if niche_value == 0 {
- CValue::const_val(fx, niche.layout().ty, 0)
- } else {
- CValue::const_val(fx, niche.layout().ty, niche_value)
- };
- niche.write_cvalue(fx, niche_llval);
- }
- }
- }
+ crate::discriminant::codegen_set_discriminant(fx, place, *variant_index);
}
- StatementKind::Assign(to_place, rval) => {
- let lval = trans_place(fx, to_place);
+ StatementKind::Assign(to_place_and_rval) => {
+ let lval = trans_place(fx, &to_place_and_rval.0);
let dest_layout = lval.layout();
- match &**rval {
+ match &to_place_and_rval.1 {
Rvalue::Use(operand) => {
let val = trans_operand(fx, operand);
lval.write_cvalue(fx, val);
place.write_place_ref(fx, lval);
}
Rvalue::BinaryOp(bin_op, lhs, rhs) => {
- let ty = fx.monomorphize(&lhs.ty(fx.mir, fx.tcx));
let lhs = trans_operand(fx, lhs);
let rhs = trans_operand(fx, rhs);
- let res = match ty.sty {
- ty::Bool => crate::num::trans_bool_binop(fx, *bin_op, lhs, rhs),
- ty::Uint(_) => {
- crate::num::trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
- }
- ty::Int(_) => {
- crate::num::trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
- }
- ty::Float(_) => crate::num::trans_float_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::Char => crate::num::trans_char_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::RawPtr(..) | ty::FnPtr(..) => {
- crate::num::trans_ptr_binop(fx, *bin_op, lhs, rhs, lval.layout().ty)
- }
- _ => unimplemented!("binop {:?} for {:?}", bin_op, ty),
- };
+ let res = crate::num::codegen_binop(fx, *bin_op, lhs, rhs);
lval.write_cvalue(fx, res);
}
Rvalue::CheckedBinaryOp(bin_op, lhs, rhs) => {
- let ty = fx.monomorphize(&lhs.ty(fx.mir, fx.tcx));
let lhs = trans_operand(fx, lhs);
let rhs = trans_operand(fx, rhs);
- let signed = type_sign(ty);
-
let res = if !fx.tcx.sess.overflow_checks() {
- let val = crate::num::trans_int_binop(fx, *bin_op, lhs, rhs, lhs.layout().ty, signed).load_scalar(fx);
+ let val =
+ crate::num::trans_int_binop(fx, *bin_op, lhs, rhs).load_scalar(fx);
let is_overflow = fx.bcx.ins().iconst(types::I8, 0);
CValue::by_val_pair(val, is_overflow, lval.layout())
} else {
- crate::num::trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, signed)
+ crate::num::trans_checked_int_binop(fx, *bin_op, lhs, rhs)
};
lval.write_cvalue(fx, res);
let val = operand.load_scalar(fx);
let res = match un_op {
UnOp::Not => {
- match layout.ty.sty {
+ match layout.ty.kind {
ty::Bool => {
let val = fx.bcx.ins().uextend(types::I32, val); // WORKAROUND for CraneStation/cranelift#466
let res = fx.bcx.ins().icmp_imm(IntCC::Equal, val, 0);
- fx.bcx.ins().bint(types::I8, res)
+ CValue::by_val(fx.bcx.ins().bint(types::I8, res), layout)
}
ty::Uint(_) | ty::Int(_) => {
- fx.bcx.ins().bnot(val)
+ CValue::by_val(fx.bcx.ins().bnot(val), layout)
}
_ => unimplemented!("un op Not for {:?}", layout.ty),
}
}
- UnOp::Neg => match layout.ty.sty {
+ UnOp::Neg => match layout.ty.kind {
ty::Int(_) => {
- let clif_ty = fx.clif_type(layout.ty).unwrap();
- if clif_ty == types::I128 {
- crate::trap::trap_unreachable_ret_value(fx, layout, "i128 neg is not yet supported").load_scalar(fx)
- } else {
- let zero = fx.bcx.ins().iconst(clif_ty, 0);
- fx.bcx.ins().isub(zero, val)
- }
+ let zero = CValue::const_val(fx, layout.ty, 0);
+ crate::num::trans_int_binop(fx, BinOp::Sub, zero, operand)
+ }
+ ty::Float(_) => {
+ CValue::by_val(fx.bcx.ins().fneg(val), layout)
}
- ty::Float(_) => fx.bcx.ins().fneg(val),
_ => unimplemented!("un op Neg for {:?}", layout.ty),
},
};
- lval.write_cvalue(fx, CValue::by_val(res, layout));
+ lval.write_cvalue(fx, res);
}
Rvalue::Cast(CastKind::Pointer(PointerCast::ReifyFnPointer), operand, ty) => {
let layout = fx.layout_of(ty);
match fx
.monomorphize(&operand.ty(&fx.mir.local_decls, fx.tcx))
- .sty
+ .kind
{
ty::FnDef(def_id, substs) => {
let func_ref = fx.get_function_ref(
Rvalue::Cast(CastKind::Misc, operand, to_ty) => {
let operand = trans_operand(fx, operand);
let from_ty = operand.layout().ty;
-
- fn is_fat_ptr<'a, 'tcx: 'a>(fx: &FunctionCx<'a, 'tcx, impl Backend>, ty: Ty<'tcx>) -> bool {
- ty
- .builtin_deref(true)
- .map(|ty::TypeAndMut {ty: pointee_ty, mutbl: _ }| fx.layout_of(pointee_ty).is_unsized())
+ let to_ty = fx.monomorphize(to_ty);
+
+ fn is_fat_ptr<'tcx>(
+ fx: &FunctionCx<'_, 'tcx, impl Backend>,
+ ty: Ty<'tcx>,
+ ) -> bool {
+ ty.builtin_deref(true)
+ .map(
+ |ty::TypeAndMut {
+ ty: pointee_ty,
+ mutbl: _,
+ }| has_ptr_meta(fx.tcx, pointee_ty),
+ )
.unwrap_or(false)
}
let (ptr, _extra) = operand.load_scalar_pair(fx);
lval.write_cvalue(fx, CValue::by_val(ptr, dest_layout))
}
- } else if let ty::Adt(adt_def, _substs) = from_ty.sty {
+ } else if let ty::Adt(adt_def, _substs) = from_ty.kind {
// enum -> discriminant value
assert!(adt_def.is_enum());
- match to_ty.sty {
- ty::Uint(_) | ty::Int(_) => {},
+ match to_ty.kind {
+ ty::Uint(_) | ty::Int(_) => {}
_ => unreachable!("cast adt {} -> {}", from_ty, to_ty),
}
- // FIXME avoid forcing to stack
- let place =
- CPlace::for_addr(operand.force_stack(fx), operand.layout());
- let discr = trans_get_discriminant(fx, place, fx.layout_of(to_ty));
+ let discr = crate::discriminant::codegen_get_discriminant(
+ fx,
+ operand,
+ fx.layout_of(to_ty),
+ );
lval.write_cvalue(fx, discr);
} else {
let to_clif_ty = fx.clif_type(to_ty).unwrap();
let from = operand.load_scalar(fx);
- let res = clif_int_or_float_cast(fx, from, type_sign(from_ty), to_clif_ty, type_sign(to_ty));
+ let res = clif_int_or_float_cast(
+ fx,
+ from,
+ type_sign(from_ty),
+ to_clif_ty,
+ type_sign(to_ty),
+ );
lval.write_cvalue(fx, CValue::by_val(res, dest_layout));
}
}
Rvalue::Cast(CastKind::Pointer(PointerCast::ClosureFnPointer(_)), operand, _ty) => {
let operand = trans_operand(fx, operand);
- match operand.layout().ty.sty {
+ match operand.layout().ty.kind {
ty::Closure(def_id, substs) => {
let instance = Instance::resolve_closure(
fx.tcx,
let func_addr = fx.bcx.ins().func_addr(fx.pointer_type, func_ref);
lval.write_cvalue(fx, CValue::by_val(func_addr, lval.layout()));
}
- _ => {
- bug!("{} cannot be cast to a fn ptr", operand.layout().ty)
- }
+ _ => bug!("{} cannot be cast to a fn ptr", operand.layout().ty),
}
}
Rvalue::Cast(CastKind::Pointer(PointerCast::Unsize), operand, _ty) => {
}
Rvalue::Discriminant(place) => {
let place = trans_place(fx, place);
- let discr = trans_get_discriminant(fx, place, dest_layout);
+ let value = place.to_cvalue(fx);
+ let discr =
+ crate::discriminant::codegen_get_discriminant(fx, value, dest_layout);
lval.write_cvalue(fx, discr);
}
Rvalue::Repeat(operand, times) => {
to.write_cvalue(fx, operand);
}
}
- _ => unimpl!("shouldn't exist at trans {:?}", rval),
+ _ => unreachable!("shouldn't exist at trans {:?}", to_place_and_rval.1),
},
}
}
StatementKind::InlineAsm(asm) => {
use syntax::ast::Name;
- let InlineAsm { asm, outputs: _, inputs: _ } = &**asm;
+ let InlineAsm {
+ asm,
+ outputs: _,
+ inputs: _,
+ } = &**asm;
let rustc::hir::InlineAsm {
asm: asm_code, // Name
- outputs, // Vec<Name>
- inputs, // Vec<Name>
- clobbers, // Vec<Name>
- volatile, // bool
- alignstack, // bool
- dialect: _, // syntax::ast::AsmDialect
+ outputs, // Vec<Name>
+ inputs, // Vec<Name>
+ clobbers, // Vec<Name>
+ volatile, // bool
+ alignstack, // bool
+ dialect: _, // syntax::ast::AsmDialect
asm_str_style: _,
- ctxt: _,
} = asm;
match &*asm_code.as_str() {
+ "" => {
+ assert_eq!(inputs, &[Name::intern("r")]);
+ assert!(outputs.is_empty(), "{:?}", outputs);
+
+ // Black box
+ }
"cpuid" | "cpuid\n" => {
assert_eq!(inputs, &[Name::intern("{eax}"), Name::intern("{ecx}")]);
assert_eq!(outputs.len(), 4);
- for (i, c) in (&["={eax}", "={ebx}", "={ecx}", "={edx}"]).iter().enumerate() {
+ for (i, c) in (&["={eax}", "={ebx}", "={ecx}", "={edx}"])
+ .iter()
+ .enumerate()
+ {
assert_eq!(&outputs[i].constraint.as_str(), c);
assert!(!outputs[i].is_rw);
assert!(!outputs[i].is_indirect);
assert!(!volatile);
assert!(!alignstack);
- crate::trap::trap_unimplemented(fx, "__cpuid_count arch intrinsic is not supported");
+ crate::trap::trap_unimplemented(
+ fx,
+ "__cpuid_count arch intrinsic is not supported",
+ );
}
"xgetbv" => {
assert_eq!(inputs, &[Name::intern("{ecx}")]);
crate::trap::trap_unimplemented(fx, "_xgetbv arch intrinsic is not supported");
}
- _ if fx.tcx.symbol_name(fx.instance).as_str() == "__rust_probestack" => {
+ _ if fx.tcx.symbol_name(fx.instance).name.as_str() == "__rust_probestack" => {
crate::trap::trap_unimplemented(fx, "__rust_probestack is not supported");
}
_ => unimpl!("Inline assembly is not supported"),
}
}
-fn codegen_array_len<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+fn codegen_array_len<'tcx>(
+ fx: &mut FunctionCx<'_, 'tcx, impl Backend>,
place: CPlace<'tcx>,
) -> Value {
- match place.layout().ty.sty {
+ match place.layout().ty.kind {
ty::Array(_elem_ty, len) => {
let len = crate::constant::force_eval_const(fx, len)
.eval_usize(fx.tcx, ParamEnv::reveal_all()) as i64;
}
}
-pub fn trans_get_discriminant<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- place: CPlace<'tcx>,
- dest_layout: TyLayout<'tcx>,
-) -> CValue<'tcx> {
- let layout = place.layout();
-
- if layout.abi == layout::Abi::Uninhabited {
- return trap_unreachable_ret_value(fx, dest_layout, "[panic] Tried to get discriminant for uninhabited type.");
- }
-
- let (discr_scalar, discr_index, discr_kind) = match &layout.variants {
- layout::Variants::Single { index } => {
- let discr_val = layout
- .ty
- .ty_adt_def()
- .map_or(u128::from(index.as_u32()), |def| {
- def.discriminant_for_variant(fx.tcx, *index).val
- });
- return CValue::const_val(fx, dest_layout.ty, discr_val);
- }
- layout::Variants::Multiple { discr, discr_index, discr_kind, variants: _ } => {
- (discr, *discr_index, discr_kind)
- }
- };
-
- let discr = place.place_field(fx, mir::Field::new(discr_index)).to_cvalue(fx);
- let discr_ty = discr.layout().ty;
- let lldiscr = discr.load_scalar(fx);
- match discr_kind {
- layout::DiscriminantKind::Tag => {
- let signed = match discr_scalar.value {
- layout::Int(_, signed) => signed,
- _ => false,
- };
- let val = clif_intcast(fx, lldiscr, fx.clif_type(dest_layout.ty).unwrap(), signed);
- return CValue::by_val(val, dest_layout);
- }
- layout::DiscriminantKind::Niche {
- dataful_variant,
- ref niche_variants,
- niche_start,
- } => {
- let niche_llty = fx.clif_type(discr_ty).unwrap();
- let dest_clif_ty = fx.clif_type(dest_layout.ty).unwrap();
- if niche_variants.start() == niche_variants.end() {
- let b = fx
- .bcx
- .ins()
- .icmp_imm(IntCC::Equal, lldiscr, *niche_start as u64 as i64);
- let if_true = fx
- .bcx
- .ins()
- .iconst(dest_clif_ty, niche_variants.start().as_u32() as i64);
- let if_false = fx
- .bcx
- .ins()
- .iconst(dest_clif_ty, dataful_variant.as_u32() as i64);
- let val = fx.bcx.ins().select(b, if_true, if_false);
- return CValue::by_val(val, dest_layout);
- } else {
- // Rebase from niche values to discriminant values.
- let delta = niche_start.wrapping_sub(niche_variants.start().as_u32() as u128);
- let delta = fx.bcx.ins().iconst(niche_llty, delta as u64 as i64);
- let lldiscr = fx.bcx.ins().isub(lldiscr, delta);
- let b = fx.bcx.ins().icmp_imm(
- IntCC::UnsignedLessThanOrEqual,
- lldiscr,
- niche_variants.end().as_u32() as i64,
- );
- let if_true =
- clif_intcast(fx, lldiscr, fx.clif_type(dest_layout.ty).unwrap(), false);
- let if_false = fx
- .bcx
- .ins()
- .iconst(dest_clif_ty, dataful_variant.as_u32() as i64);
- let val = fx.bcx.ins().select(b, if_true, if_false);
- return CValue::by_val(val, dest_layout);
- }
- }
- }
-}
-
-pub fn trans_place<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+pub fn trans_place<'tcx>(
+ fx: &mut FunctionCx<'_, 'tcx, impl Backend>,
place: &Place<'tcx>,
) -> CPlace<'tcx> {
- let base = match &place.base {
+ let mut cplace = match &place.base {
PlaceBase::Local(local) => fx.get_local_place(*local),
PlaceBase::Static(static_) => match static_.kind {
- StaticKind::Static(def_id) => {
- crate::constant::codegen_static_ref(fx, def_id, static_.ty)
+ StaticKind::Static => {
+ crate::constant::codegen_static_ref(fx, static_.def_id, static_.ty)
}
- StaticKind::Promoted(promoted) => {
- crate::constant::trans_promoted(fx, promoted, static_.ty)
+ StaticKind::Promoted(promoted, substs) => {
+ let instance = Instance::new(static_.def_id, fx.monomorphize(&substs));
+ crate::constant::trans_promoted(fx, instance, promoted, static_.ty)
}
- }
- };
-
- trans_place_projection(fx, base, &place.projection)
-}
-
-pub fn trans_place_projection<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- base: CPlace<'tcx>,
- projection: &Option<Box<Projection<'tcx>>>,
-) -> CPlace<'tcx> {
- let projection = if let Some(projection) = projection {
- projection
- } else {
- return base;
+ },
};
- let base = trans_place_projection(fx, base, &projection.base);
-
- match projection.elem {
- ProjectionElem::Deref => base.place_deref(fx),
- ProjectionElem::Field(field, _ty) => base.place_field(fx, field),
- ProjectionElem::Index(local) => {
- let index = fx.get_local_place(local).to_cvalue(fx).load_scalar(fx);
- base.place_index(fx, index)
- }
- ProjectionElem::ConstantIndex {
- offset,
- min_length: _,
- from_end,
- } => {
- let index = if !from_end {
- fx.bcx.ins().iconst(fx.pointer_type, offset as i64)
- } else {
- let len = codegen_array_len(fx, base);
- fx.bcx.ins().iadd_imm(len, -(offset as i64))
- };
- base.place_index(fx, index)
- }
- ProjectionElem::Subslice { from, to } => {
- // These indices are generated by slice patterns.
- // slice[from:-to] in Python terms.
-
- match base.layout().ty.sty {
- ty::Array(elem_ty, len) => {
- let elem_layout = fx.layout_of(elem_ty);
- let ptr = base.to_addr(fx);
- let len = crate::constant::force_eval_const(fx, len)
- .eval_usize(fx.tcx, ParamEnv::reveal_all());
- CPlace::for_addr(
- fx.bcx.ins().iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
- fx.layout_of(fx.tcx.mk_array(elem_ty, len - from as u64 - to as u64)),
- )
- }
- ty::Slice(elem_ty) => {
- let elem_layout = fx.layout_of(elem_ty);
- let (ptr, len) = base.to_addr_maybe_unsized(fx);
- let len = len.unwrap();
- CPlace::for_addr_with_extra(
- fx.bcx.ins().iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
- fx.bcx.ins().iadd_imm(len, -(from as i64 + to as i64)),
- base.layout(),
- )
+ for elem in &*place.projection {
+ match *elem {
+ PlaceElem::Deref => {
+ cplace = cplace.place_deref(fx);
+ }
+ PlaceElem::Field(field, _ty) => {
+ cplace = cplace.place_field(fx, field);
+ }
+ PlaceElem::Index(local) => {
+ let index = fx.get_local_place(local).to_cvalue(fx).load_scalar(fx);
+ cplace = cplace.place_index(fx, index);
+ }
+ PlaceElem::ConstantIndex {
+ offset,
+ min_length: _,
+ from_end,
+ } => {
+ let index = if !from_end {
+ fx.bcx.ins().iconst(fx.pointer_type, offset as i64)
+ } else {
+ let len = codegen_array_len(fx, cplace);
+ fx.bcx.ins().iadd_imm(len, -(offset as i64))
+ };
+ cplace = cplace.place_index(fx, index);
+ }
+ PlaceElem::Subslice { from, to } => {
+ // These indices are generated by slice patterns.
+ // slice[from:-to] in Python terms.
+
+ match cplace.layout().ty.kind {
+ ty::Array(elem_ty, len) => {
+ let elem_layout = fx.layout_of(elem_ty);
+ let ptr = cplace.to_addr(fx);
+ let len = crate::constant::force_eval_const(fx, len)
+ .eval_usize(fx.tcx, ParamEnv::reveal_all());
+ cplace = CPlace::for_addr(
+ fx.bcx
+ .ins()
+ .iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
+ fx.layout_of(fx.tcx.mk_array(elem_ty, len - from as u64 - to as u64)),
+ );
+ }
+ ty::Slice(elem_ty) => {
+ let elem_layout = fx.layout_of(elem_ty);
+ let (ptr, len) = cplace.to_addr_maybe_unsized(fx);
+ let len = len.unwrap();
+ cplace = CPlace::for_addr_with_extra(
+ fx.bcx
+ .ins()
+ .iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
+ fx.bcx.ins().iadd_imm(len, -(from as i64 + to as i64)),
+ cplace.layout(),
+ );
+ }
+ _ => unreachable!(),
}
- _ => unreachable!(),
+ }
+ PlaceElem::Downcast(_adt_def, variant) => {
+ cplace = cplace.downcast_variant(fx, variant);
}
}
- ProjectionElem::Downcast(_adt_def, variant) => base.downcast_variant(fx, variant),
}
+
+ cplace
}
-pub fn trans_operand<'a, 'tcx>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
+pub fn trans_operand<'tcx>(
+ fx: &mut FunctionCx<'_, 'tcx, impl Backend>,
operand: &Operand<'tcx>,
) -> CValue<'tcx> {
match operand {
projects / rust.git / blobdiff