-use crate::prelude::*;
-
-struct PrintOnPanic<F: Fn() -> String>(F);
-impl<F: Fn() -> String> Drop for PrintOnPanic<F> {
- fn drop(&mut self) {
- if ::std::thread::panicking() {
- println!("{}", (self.0)());
- }
- }
-}
-
-pub fn trans_mono_item<'a, 'clif, 'tcx: 'a, B: Backend + 'static>(
- cx: &mut crate::CodegenCx<'a, 'clif, 'tcx, B>,
- mono_item: MonoItem<'tcx>,
- linkage: Linkage,
-) {
- let tcx = cx.tcx;
- match mono_item {
- MonoItem::Fn(inst) => {
- let _inst_guard =
- PrintOnPanic(|| format!("{:?} {}", inst, tcx.symbol_name(inst).as_str()));
- debug_assert!(!inst.substs.needs_infer());
- let _mir_guard = PrintOnPanic(|| {
- match inst.def {
- InstanceDef::Item(_)
- | InstanceDef::DropGlue(_, _)
- | InstanceDef::Virtual(_, _)
- if inst.def_id().krate == LOCAL_CRATE =>
- {
- let mut mir = ::std::io::Cursor::new(Vec::new());
- crate::rustc_mir::util::write_mir_pretty(
- tcx,
- Some(inst.def_id()),
- &mut mir,
- )
- .unwrap();
- String::from_utf8(mir.into_inner()).unwrap()
- }
- _ => {
- // FIXME fix write_mir_pretty for these instances
- format!("{:#?}", tcx.instance_mir(inst.def))
- }
- }
- });
+use rustc::ty::adjustment::PointerCast;
- trans_fn(cx, inst, linkage);
- }
- MonoItem::Static(def_id) => {
- crate::constant::codegen_static(&mut cx.ccx, def_id);
- }
- MonoItem::GlobalAsm(node_id) => tcx
- .sess
- .fatal(&format!("Unimplemented global asm mono item {:?}", node_id)),
- }
-}
+use crate::prelude::*;
-fn trans_fn<'a, 'clif, 'tcx: 'a, B: Backend + 'static>(
- cx: &mut crate::CodegenCx<'a, 'clif, 'tcx, B>,
+pub fn trans_fn<'clif, 'tcx, B: Backend + 'static>(
+ cx: &mut crate::CodegenCx<'clif, 'tcx, B>,
instance: Instance<'tcx>,
linkage: Linkage,
) {
let tcx = cx.tcx;
- // Step 1. Get mir
let mir = tcx.instance_mir(instance.def);
- // Step 2. Check fn sig for u128 and i128 and replace those functions with a trap.
- {
- // FIXME implement u128 and i128 support
-
- // Step 2a. Check sig for u128 and i128
- let fn_ty = instance.ty(tcx);
- let fn_sig = crate::abi::ty_fn_sig(tcx, fn_ty);
-
- struct UI128Visitor<'a, 'tcx: 'a>(TyCtxt<'a, 'tcx, 'tcx>, bool);
-
- impl<'a, 'tcx: 'a> rustc::ty::fold::TypeVisitor<'tcx> for UI128Visitor<'a, 'tcx> {
- fn visit_ty(&mut self, t: Ty<'tcx>) -> bool {
- if t.sty == self.0.types.u128.sty || t.sty == self.0.types.i128.sty {
- self.1 = true;
- return false; // stop visiting
- }
-
- t.super_visit_with(self)
- }
- }
-
- let mut visitor = UI128Visitor(tcx, false);
- fn_sig.visit_with(&mut visitor);
-
- // Step 2b. If found replace function with a trap.
- if visitor.1 {
- tcx.sess.warn("u128 and i128 are not yet supported. \
- Functions using these as args will be replaced with a trap.");
-
- // Step 2b1. Declare function with fake signature
- let sig = Signature {
- params: vec![AbiParam::new(types::INVALID)],
- returns: vec![],
- call_conv: CallConv::Fast,
- };
- let name = tcx.symbol_name(instance).as_str();
- let func_id = cx.module.declare_function(&*name, linkage, &sig).unwrap();
-
- // Step 2b2. Create trapping function
- let mut func = Function::with_name_signature(ExternalName::user(0, 0), sig);
- let mut func_ctx = FunctionBuilderContext::new();
- let mut bcx = FunctionBuilder::new(&mut func, &mut func_ctx);
- let start_ebb = bcx.create_ebb();
- bcx.append_ebb_params_for_function_params(start_ebb);
- bcx.switch_to_block(start_ebb);
- crate::trap::trap_unreachable(&mut bcx);
- bcx.seal_all_blocks();
- bcx.finalize();
-
- // Step 2b3. Define function
- cx.caches.context.func = func;
- cx.module
- .define_function(func_id, &mut cx.caches.context)
- .unwrap();
- cx.caches.context.clear();
- return;
- }
- }
-
- // Step 3. Declare function
+ // Declare function
let (name, sig) = get_function_name_and_sig(tcx, instance, false);
let func_id = cx.module.declare_function(&name, linkage, &sig).unwrap();
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));
- // Step 4. Make FunctionBuilder
+ // Make FunctionBuilder
let mut func = Function::with_name_signature(ExternalName::user(0, 0), sig);
let mut func_ctx = FunctionBuilderContext::new();
let mut bcx = FunctionBuilder::new(&mut func, &mut func_ctx);
- // Step 5. Predefine ebb's
+ // Predefine ebb's
let start_ebb = bcx.create_ebb();
let mut ebb_map: HashMap<BasicBlock, Ebb> = HashMap::new();
for (bb, _bb_data) in mir.basic_blocks().iter_enumerated() {
ebb_map.insert(bb, bcx.create_ebb());
}
- // Step 6. Make FunctionCx
+ // Make FunctionCx
let pointer_type = cx.module.target_config().pointer_type();
let clif_comments = crate::pretty_clif::CommentWriter::new(tcx, instance);
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(),
};
- // Step 7. Codegen function
- with_unimpl_span(fx.mir.span, || {
- crate::abi::codegen_fn_prelude(&mut fx, start_ebb);
- codegen_fn_content(&mut fx);
- });
- let source_info_set = fx.source_info_set.clone();
+ 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;
+ let clif_comments = fx.clif_comments;
+ let source_info_set = fx.source_info_set;
- // Step 8. Write function to file for debugging
#[cfg(debug_assertions)]
- fx.write_clif_file();
+ crate::pretty_clif::write_clif_file(cx.tcx, "unopt", instance, &func, &clif_comments, None);
+
+ // Verify function
+ verify_func(tcx, &clif_comments, &func);
- // Step 9. Verify function
- verify_func(tcx, fx.clif_comments, &func);
+ // Define function
+ let context = &mut cx.caches.context;
+ context.func = func;
+ cx.module.define_function(func_id, context).unwrap();
- // Step 10. Define function
- cx.caches.context.func = func;
- cx.module
- .define_function(func_id, &mut cx.caches.context)
- .unwrap();
+ let value_ranges = context
+ .build_value_labels_ranges(cx.module.isa())
+ .expect("value location ranges");
- // Step 11. Define debuginfo for function
- let context = &cx.caches.context;
+ // 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),
+ );
+
+ // Define debuginfo for function
let isa = cx.module.isa();
debug_context
.as_mut()
.map(|x| x.define(tcx, context, isa, &source_info_set));
- // Step 12. Clear context to make it usable for the next function
- cx.caches.context.clear();
+ // Clear context to make it usable for the next function
+ context.clear();
}
-fn verify_func(tcx: TyCtxt, writer: crate::pretty_clif::CommentWriter, func: &Function) {
+fn verify_func(tcx: TyCtxt, writer: &crate::pretty_clif::CommentWriter, func: &Function) {
let flags = settings::Flags::new(settings::builder());
match ::cranelift::codegen::verify_function(&func, &flags) {
Ok(_) => {}
let pretty_error = ::cranelift::codegen::print_errors::pretty_verifier_error(
&func,
None,
- Some(Box::new(&writer)),
+ Some(Box::new(writer)),
err,
);
tcx.sess
}
}
-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
TerminatorKind::Assert {
cond,
expected,
- msg: _,
+ msg,
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(&mut fx.bcx);
+ 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.");
}
- TerminatorKind::Resume | TerminatorKind::Abort | TerminatorKind::Unreachable => {
- trap_unreachable(&mut fx.bcx);
+ TerminatorKind::Unreachable => {
+ trap_unreachable(fx, "[corruption] Hit unreachable code.");
}
TerminatorKind::Yield { .. }
| TerminatorKind::FalseEdges { .. }
target,
unwind: _,
} => {
- let ty = location.ty(fx.mir, fx.tcx).to_ty(fx.tcx);
- let ty = fx.monomorphize(&ty);
- let drop_fn = crate::rustc_mir::monomorphize::resolve_drop_in_place(fx.tcx, ty);
-
- if let ty::InstanceDef::DropGlue(_, None) = drop_fn.def {
- // we don't actually need to drop anything
- } else {
- let drop_place = trans_place(fx, location);
- let drop_fn_ty = drop_fn.ty(fx.tcx);
- match ty.sty {
- ty::Dynamic(..) => {
- crate::abi::codegen_drop(fx, drop_place, drop_fn_ty);
- }
- _ => {
- let arg_place = CPlace::new_stack_slot(
- fx,
- fx.tcx.mk_ref(
- &ty::RegionKind::ReErased,
- TypeAndMut {
- ty,
- mutbl: crate::rustc::hir::Mutability::MutMutable,
- },
- ),
- );
- drop_place.write_place_ref(fx, arg_place);
- let arg_value = arg_place.to_cvalue(fx);
- crate::abi::codegen_call_inner(
- fx,
- None,
- drop_fn_ty,
- vec![arg_value],
- None,
- );
- }
- }
- }
+ let drop_place = trans_place(fx, location);
+ crate::abi::codegen_drop(fx, drop_place);
let target_ebb = fx.get_ebb(*target);
fx.bcx.ins().jump(target_ebb, &[]);
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::Tagged { .. } => {
- let ptr = place.place_field(fx, mir::Field::new(0));
- let to = layout
- .ty
- .ty_adt_def()
- .unwrap()
- .discriminant_for_variant(fx.tcx, *variant_index)
- .val;
- let discr = CValue::const_val(fx, ptr.layout().ty, to as u64 as i64);
- ptr.write_cvalue(fx, discr);
- }
- layout::Variants::NicheFilling {
- dataful_variant,
- ref niche_variants,
- niche_start,
- ..
- } => {
- if *variant_index != dataful_variant {
- let niche = place.place_field(fx, mir::Field::new(0));
- //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 as u64 as i64)
- };
- 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 => trans_bool_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::Uint(_) => {
- trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
- }
- ty::Int(_) => {
- trans_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
- }
- ty::Float(_) => trans_float_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::Char => trans_char_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::RawPtr(..) => trans_ptr_binop(fx, *bin_op, lhs, rhs, lval.layout().ty),
- ty::FnPtr(..) => 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 res = match ty.sty {
- ty::Uint(_) => {
- trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, false)
- }
- ty::Int(_) => {
- trans_checked_int_binop(fx, *bin_op, lhs, rhs, lval.layout().ty, true)
- }
- _ => unimplemented!("checked binop {:?} for {:?}", bin_op, ty),
+ let res = if !fx.tcx.sess.overflow_checks() {
+ 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.write_cvalue(fx, res);
}
Rvalue::UnaryOp(un_op, operand) => {
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(_) => {
+ CValue::by_val(fx.bcx.ins().bnot(val), layout)
}
- ty::Uint(_) | ty::Int(_) => fx.bcx.ins().bnot(val),
_ => 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();
- 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::ByVal(res, layout));
+ lval.write_cvalue(fx, res);
}
- Rvalue::Cast(CastKind::ReifyFnPointer, operand, ty) => {
+ 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(
.unwrap(),
);
let func_addr = fx.bcx.ins().func_addr(fx.pointer_type, func_ref);
- lval.write_cvalue(fx, CValue::ByVal(func_addr, layout));
+ lval.write_cvalue(fx, CValue::by_val(func_addr, layout));
}
_ => bug!("Trying to ReifyFnPointer on non FnDef {:?}", ty),
}
}
- Rvalue::Cast(CastKind::UnsafeFnPointer, operand, ty)
- | Rvalue::Cast(CastKind::MutToConstPointer, operand, ty) => {
+ Rvalue::Cast(CastKind::Pointer(PointerCast::UnsafeFnPointer), operand, ty)
+ | Rvalue::Cast(CastKind::Pointer(PointerCast::MutToConstPointer), operand, ty) => {
let operand = trans_operand(fx, operand);
let layout = fx.layout_of(ty);
lval.write_cvalue(fx, operand.unchecked_cast_to(layout));
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)
}
} else {
// fat-ptr -> thin-ptr
let (ptr, _extra) = operand.load_scalar_pair(fx);
- lval.write_cvalue(fx, CValue::ByVal(ptr, dest_layout))
+ 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::Addr(operand.force_stack(fx), None, 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 from_clif_ty = fx.clif_type(from_ty).unwrap();
let to_clif_ty = fx.clif_type(to_ty).unwrap();
let from = operand.load_scalar(fx);
- let signed = match from_ty.sty {
- ty::Ref(..) | ty::RawPtr(..) | ty::FnPtr(..) | ty::Char | ty::Uint(..) | ty::Bool => false,
- ty::Int(..) => true,
- ty::Float(..) => false, // `signed` is unused for floats
- _ => panic!("{}", from_ty),
- };
-
- let res = if from_clif_ty.is_int() && to_clif_ty.is_int() {
- // int-like -> int-like
- crate::common::clif_intcast(
- fx,
- from,
- to_clif_ty,
- signed,
- )
- } else if from_clif_ty.is_int() && to_clif_ty.is_float() {
- // int-like -> float
- // FIXME missing encoding for fcvt_from_sint.f32.i8
- let from = if from_clif_ty == types::I8 || from_clif_ty == types::I16 {
- fx.bcx.ins().uextend(types::I32, from)
- } else {
- from
- };
- if signed {
- fx.bcx.ins().fcvt_from_sint(to_clif_ty, from)
- } else {
- fx.bcx.ins().fcvt_from_uint(to_clif_ty, from)
- }
- } else if from_clif_ty.is_float() && to_clif_ty.is_int() {
- // float -> int-like
- let from = operand.load_scalar(fx);
- if signed {
- fx.bcx.ins().fcvt_to_sint_sat(to_clif_ty, from)
- } else {
- fx.bcx.ins().fcvt_to_uint_sat(to_clif_ty, from)
- }
- } else if from_clif_ty.is_float() && to_clif_ty.is_float() {
- // float -> float
- match (from_clif_ty, to_clif_ty) {
- (types::F32, types::F64) => {
- fx.bcx.ins().fpromote(types::F64, from)
- }
- (types::F64, types::F32) => {
- fx.bcx.ins().fdemote(types::F32, from)
- }
- _ => from,
- }
- } else {
- unimpl!("rval misc {:?} {:?}", from_ty, to_ty)
- };
- lval.write_cvalue(fx, CValue::ByVal(res, dest_layout));
+ 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::ClosureFnPointer, operand, _ty) => {
+ 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 = rustc_mir::monomorphize::resolve_closure(
+ let instance = Instance::resolve_closure(
fx.tcx,
def_id,
substs,
);
let func_ref = fx.get_function_ref(instance);
let func_addr = fx.bcx.ins().func_addr(fx.pointer_type, func_ref);
- lval.write_cvalue(fx, CValue::ByVal(func_addr, lval.layout()));
- }
- _ => {
- bug!("{} cannot be cast to a fn ptr", operand.layout().ty)
+ lval.write_cvalue(fx, CValue::by_val(func_addr, lval.layout()));
}
+ _ => bug!("{} cannot be cast to a fn ptr", operand.layout().ty),
}
}
- Rvalue::Cast(CastKind::Unsize, operand, _ty) => {
+ Rvalue::Cast(CastKind::Pointer(PointerCast::Unsize), operand, _ty) => {
let operand = trans_operand(fx, operand);
operand.unsize_value(fx, lval);
}
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) => {
let place = trans_place(fx, place);
let usize_layout = fx.layout_of(fx.tcx.types.usize);
let len = codegen_array_len(fx, place);
- lval.write_cvalue(fx, CValue::ByVal(len, usize_layout));
+ lval.write_cvalue(fx, CValue::by_val(len, usize_layout));
}
Rvalue::NullaryOp(NullOp::Box, content_ty) => {
use rustc::middle::lang_items::ExchangeMallocFnLangItem;
let func_ref = fx.get_function_ref(instance);
let call = fx.bcx.ins().call(func_ref, &[llsize, llalign]);
let ptr = fx.bcx.inst_results(call)[0];
- lval.write_cvalue(fx, CValue::ByVal(ptr, box_layout));
+ lval.write_cvalue(fx, CValue::by_val(ptr, box_layout));
}
Rvalue::NullaryOp(NullOp::SizeOf, ty) => {
assert!(lval
.ty
.is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all()));
let ty_size = fx.layout_of(ty).size.bytes();
- let val = CValue::const_val(fx, fx.tcx.types.usize, ty_size as i64);
+ let val = CValue::const_val(fx, fx.tcx.types.usize, ty_size.into());
lval.write_cvalue(fx, val);
}
Rvalue::Aggregate(kind, operands) => match **kind {
to.write_cvalue(fx, operand);
}
}
- _ => unimpl!("shouldn't exist at trans {:?}", rval),
+ _ => unreachable!("shouldn't exist at trans {:?}", to_place_and_rval.1),
},
}
}
| StatementKind::Retag { .. }
| StatementKind::AscribeUserType(..) => {}
- StatementKind::InlineAsm { .. } => unimpl!("Inline assembly is not supported"),
+ StatementKind::InlineAsm(asm) => {
+ use syntax::ast::Name;
+ 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
+ asm_str_style: _,
+ } = 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()
+ {
+ assert_eq!(&outputs[i].constraint.as_str(), c);
+ assert!(!outputs[i].is_rw);
+ assert!(!outputs[i].is_indirect);
+ }
+
+ assert_eq!(clobbers, &[Name::intern("rbx")]);
+
+ assert!(!volatile);
+ assert!(!alignstack);
+
+ crate::trap::trap_unimplemented(
+ fx,
+ "__cpuid_count arch intrinsic is not supported",
+ );
+ }
+ "xgetbv" => {
+ assert_eq!(inputs, &[Name::intern("{ecx}")]);
+
+ assert_eq!(outputs.len(), 2);
+ for (i, c) in (&["={eax}", "={edx}"]).iter().enumerate() {
+ assert_eq!(&outputs[i].constraint.as_str(), c);
+ assert!(!outputs[i].is_rw);
+ assert!(!outputs[i].is_indirect);
+ }
+
+ assert_eq!(clobbers, &[]);
+
+ assert!(!volatile);
+ assert!(!alignstack);
+
+ crate::trap::trap_unimplemented(fx, "_xgetbv arch intrinsic is not supported");
+ }
+ _ 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).unwrap_usize(fx.tcx) as i64;
+ let len = crate::constant::force_eval_const(fx, len)
+ .eval_usize(fx.tcx, ParamEnv::reveal_all()) as i64;
fx.bcx.ins().iconst(fx.pointer_type, len)
}
ty::Slice(_elem_ty) => place
}
}
-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);
- }
- match layout.variants {
- layout::Variants::Single { index } => {
- let discr_val = layout
- .ty
- .ty_adt_def()
- .map_or(index.as_u32() as u128, |def| {
- def.discriminant_for_variant(fx.tcx, index).val
- });
- return CValue::const_val(fx, dest_layout.ty, discr_val as u64 as i64);
- }
- layout::Variants::Tagged { .. } | layout::Variants::NicheFilling { .. } => {}
- }
-
- let discr = place.place_field(fx, mir::Field::new(0)).to_cvalue(fx);
- let discr_ty = discr.layout().ty;
- let lldiscr = discr.load_scalar(fx);
- match layout.variants {
- layout::Variants::Single { .. } => bug!(),
- layout::Variants::Tagged { ref tag, .. } => {
- let signed = match tag.value {
- layout::Int(_, signed) => signed,
- _ => false,
- };
- let val = clif_intcast(fx, lldiscr, fx.clif_type(dest_layout.ty).unwrap(), signed);
- return CValue::ByVal(val, dest_layout);
- }
- layout::Variants::NicheFilling {
- 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::ByVal(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::ByVal(val, dest_layout);
+pub fn trans_place<'tcx>(
+ fx: &mut FunctionCx<'_, 'tcx, impl Backend>,
+ place: &Place<'tcx>,
+) -> CPlace<'tcx> {
+ let mut cplace = match &place.base {
+ PlaceBase::Local(local) => fx.get_local_place(*local),
+ PlaceBase::Static(static_) => match static_.kind {
+ StaticKind::Static => {
+ crate::constant::codegen_static_ref(fx, static_.def_id, static_.ty)
}
- }
- }
-}
-
-macro_rules! binop_match {
- (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, bug) => {
- bug!("binop {} on {} lhs: {:?} rhs: {:?}", stringify!($var), $bug_fmt, $lhs, $rhs)
- };
- (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, icmp($cc:ident)) => {{
- assert_eq!($fx.tcx.types.bool, $ret_ty);
- let ret_layout = $fx.layout_of($ret_ty);
-
- let b = $fx.bcx.ins().icmp(IntCC::$cc, $lhs, $rhs);
- CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
- }};
- (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, fcmp($cc:ident)) => {{
- assert_eq!($fx.tcx.types.bool, $ret_ty);
- let ret_layout = $fx.layout_of($ret_ty);
- let b = $fx.bcx.ins().fcmp(FloatCC::$cc, $lhs, $rhs);
- CValue::ByVal($fx.bcx.ins().bint(types::I8, b), ret_layout)
- }};
- (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, custom(|| $body:expr)) => {{
- $body
- }};
- (@single $fx:expr, $bug_fmt:expr, $var:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $name:ident) => {{
- let ret_layout = $fx.layout_of($ret_ty);
- CValue::ByVal($fx.bcx.ins().$name($lhs, $rhs), ret_layout)
- }};
- (
- $fx:expr, $bin_op:expr, $signed:expr, $lhs:expr, $rhs:expr, $ret_ty:expr, $bug_fmt:expr;
- $(
- $var:ident ($sign:pat) $name:tt $( ( $($next:tt)* ) )? ;
- )*
- ) => {{
- let lhs = $lhs.load_scalar($fx);
- let rhs = $rhs.load_scalar($fx);
- match ($bin_op, $signed) {
- $(
- (BinOp::$var, $sign) => binop_match!(@single $fx, $bug_fmt, $var, $signed, lhs, rhs, $ret_ty, $name $( ( $($next)* ) )?),
- )*
- }
- }}
-}
-
-fn trans_bool_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- lhs: CValue<'tcx>,
- rhs: CValue<'tcx>,
- ty: Ty<'tcx>,
-) -> CValue<'tcx> {
- let res = binop_match! {
- fx, bin_op, false, lhs, rhs, ty, "bool";
- Add (_) bug;
- Sub (_) bug;
- Mul (_) bug;
- Div (_) bug;
- Rem (_) bug;
- BitXor (_) bxor;
- BitAnd (_) band;
- BitOr (_) bor;
- Shl (_) bug;
- Shr (_) bug;
-
- Eq (_) icmp(Equal);
- Lt (_) icmp(UnsignedLessThan);
- Le (_) icmp(UnsignedLessThanOrEqual);
- Ne (_) icmp(NotEqual);
- Ge (_) icmp(UnsignedGreaterThanOrEqual);
- Gt (_) icmp(UnsignedGreaterThan);
-
- Offset (_) bug;
- };
-
- res
-}
-
-pub fn trans_int_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- lhs: CValue<'tcx>,
- rhs: CValue<'tcx>,
- out_ty: Ty<'tcx>,
- signed: bool,
-) -> CValue<'tcx> {
- if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
- assert_eq!(
- lhs.layout().ty,
- rhs.layout().ty,
- "int binop requires lhs and rhs of same type"
- );
- }
- binop_match! {
- fx, bin_op, signed, lhs, rhs, out_ty, "int/uint";
- Add (_) iadd;
- Sub (_) isub;
- Mul (_) imul;
- Div (false) udiv;
- Div (true) sdiv;
- Rem (false) urem;
- Rem (true) srem;
- BitXor (_) bxor;
- BitAnd (_) band;
- BitOr (_) bor;
- Shl (_) ishl;
- Shr (false) ushr;
- Shr (true) sshr;
-
- Eq (_) icmp(Equal);
- Lt (false) icmp(UnsignedLessThan);
- Lt (true) icmp(SignedLessThan);
- Le (false) icmp(UnsignedLessThanOrEqual);
- Le (true) icmp(SignedLessThanOrEqual);
- Ne (_) icmp(NotEqual);
- Ge (false) icmp(UnsignedGreaterThanOrEqual);
- Ge (true) icmp(SignedGreaterThanOrEqual);
- Gt (false) icmp(UnsignedGreaterThan);
- Gt (true) icmp(SignedGreaterThan);
-
- Offset (_) bug;
- }
-}
-
-pub fn trans_checked_int_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- in_lhs: CValue<'tcx>,
- in_rhs: CValue<'tcx>,
- out_ty: Ty<'tcx>,
- signed: bool,
-) -> CValue<'tcx> {
- if bin_op != BinOp::Shl && bin_op != BinOp::Shr {
- assert_eq!(
- in_lhs.layout().ty,
- in_rhs.layout().ty,
- "checked int binop requires lhs and rhs of same type"
- );
- }
-
- let lhs = in_lhs.load_scalar(fx);
- let rhs = in_rhs.load_scalar(fx);
- let res = match bin_op {
- BinOp::Add => fx.bcx.ins().iadd(lhs, rhs),
- BinOp::Sub => fx.bcx.ins().isub(lhs, rhs),
- BinOp::Mul => fx.bcx.ins().imul(lhs, rhs),
- BinOp::Shl => fx.bcx.ins().ishl(lhs, rhs),
- BinOp::Shr => {
- if !signed {
- fx.bcx.ins().ushr(lhs, rhs)
- } else {
- fx.bcx.ins().sshr(lhs, rhs)
+ StaticKind::Promoted(promoted, substs) => {
+ let instance = Instance::new(static_.def_id, fx.monomorphize(&substs));
+ crate::constant::trans_promoted(fx, instance, promoted, static_.ty)
}
- }
- _ => bug!(
- "binop {:?} on checked int/uint lhs: {:?} rhs: {:?}",
- bin_op,
- in_lhs,
- in_rhs
- ),
+ },
};
- // TODO: check for overflow
- let has_overflow = fx.bcx.ins().iconst(types::I8, 0);
-
- let out_place = CPlace::new_stack_slot(fx, out_ty);
- let out_layout = out_place.layout();
- out_place.write_cvalue(fx, CValue::ByValPair(res, has_overflow, out_layout));
-
- out_place.to_cvalue(fx)
-}
-
-fn trans_float_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- lhs: CValue<'tcx>,
- rhs: CValue<'tcx>,
- ty: Ty<'tcx>,
-) -> CValue<'tcx> {
- let res = binop_match! {
- fx, bin_op, false, lhs, rhs, ty, "float";
- Add (_) fadd;
- Sub (_) fsub;
- Mul (_) fmul;
- Div (_) fdiv;
- Rem (_) custom(|| {
- assert_eq!(lhs.layout().ty, ty);
- assert_eq!(rhs.layout().ty, ty);
- match ty.sty {
- ty::Float(FloatTy::F32) => fx.easy_call("fmodf", &[lhs, rhs], ty),
- ty::Float(FloatTy::F64) => fx.easy_call("fmod", &[lhs, rhs], ty),
- _ => bug!(),
+ for elem in &*place.projection {
+ match *elem {
+ PlaceElem::Deref => {
+ cplace = cplace.place_deref(fx);
}
- });
- BitXor (_) bxor;
- BitAnd (_) band;
- BitOr (_) bor;
- Shl (_) bug;
- Shr (_) bug;
-
- Eq (_) fcmp(Equal);
- Lt (_) fcmp(LessThan);
- Le (_) fcmp(LessThanOrEqual);
- Ne (_) fcmp(NotEqual);
- Ge (_) fcmp(GreaterThanOrEqual);
- Gt (_) fcmp(GreaterThan);
-
- Offset (_) bug;
- };
-
- res
-}
-
-fn trans_char_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- lhs: CValue<'tcx>,
- rhs: CValue<'tcx>,
- ty: Ty<'tcx>,
-) -> CValue<'tcx> {
- let res = binop_match! {
- fx, bin_op, false, lhs, rhs, ty, "char";
- Add (_) bug;
- Sub (_) bug;
- Mul (_) bug;
- Div (_) bug;
- Rem (_) bug;
- BitXor (_) bug;
- BitAnd (_) bug;
- BitOr (_) bug;
- Shl (_) bug;
- Shr (_) bug;
-
- Eq (_) icmp(Equal);
- Lt (_) icmp(UnsignedLessThan);
- Le (_) icmp(UnsignedLessThanOrEqual);
- Ne (_) icmp(NotEqual);
- Ge (_) icmp(UnsignedGreaterThanOrEqual);
- Gt (_) icmp(UnsignedGreaterThan);
-
- Offset (_) bug;
- };
-
- res
-}
-
-fn trans_ptr_binop<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- bin_op: BinOp,
- lhs: CValue<'tcx>,
- rhs: CValue<'tcx>,
- ret_ty: Ty<'tcx>,
-) -> CValue<'tcx> {
- let not_fat = match lhs.layout().ty.sty {
- ty::RawPtr(TypeAndMut { ty, mutbl: _ }) => {
- ty.is_sized(fx.tcx.at(DUMMY_SP), ParamEnv::reveal_all())
- }
- ty::FnPtr(..) => true,
- _ => bug!("trans_ptr_binop on non ptr"),
- };
- if not_fat {
- if let BinOp::Offset = bin_op {
- let (base, offset) = (lhs, rhs.load_scalar(fx));
- let pointee_ty = base.layout().ty.builtin_deref(true).unwrap().ty;
- let pointee_size = fx.layout_of(pointee_ty).size.bytes();
- let ptr_diff = fx.bcx.ins().imul_imm(offset, pointee_size as i64);
- let base_val = base.load_scalar(fx);
- let res = fx.bcx.ins().iadd(base_val, ptr_diff);
- return CValue::ByVal(res, base.layout());
- }
-
- binop_match! {
- fx, bin_op, false, lhs, rhs, ret_ty, "ptr";
- Add (_) bug;
- Sub (_) bug;
- Mul (_) bug;
- Div (_) bug;
- Rem (_) bug;
- BitXor (_) bug;
- BitAnd (_) bug;
- BitOr (_) bug;
- Shl (_) bug;
- Shr (_) bug;
-
- Eq (_) icmp(Equal);
- Lt (_) icmp(UnsignedLessThan);
- Le (_) icmp(UnsignedLessThanOrEqual);
- Ne (_) icmp(NotEqual);
- Ge (_) icmp(UnsignedGreaterThanOrEqual);
- Gt (_) icmp(UnsignedGreaterThan);
-
- Offset (_) bug; // Handled above
- }
- } else {
- let (lhs_ptr, lhs_extra) = lhs.load_scalar_pair(fx);
- let (rhs_ptr, rhs_extra) = rhs.load_scalar_pair(fx);
- let res = match bin_op {
- BinOp::Eq => {
- let ptr_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_ptr, rhs_ptr);
- let extra_eq = fx.bcx.ins().icmp(IntCC::Equal, lhs_extra, rhs_extra);
- fx.bcx.ins().band(ptr_eq, extra_eq)
+ PlaceElem::Field(field, _ty) => {
+ cplace = cplace.place_field(fx, field);
}
- BinOp::Ne => {
- let ptr_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_ptr, rhs_ptr);
- let extra_ne = fx.bcx.ins().icmp(IntCC::NotEqual, lhs_extra, rhs_extra);
- fx.bcx.ins().bor(ptr_ne, extra_ne)
+ PlaceElem::Index(local) => {
+ let index = fx.get_local_place(local).to_cvalue(fx).load_scalar(fx);
+ cplace = cplace.place_index(fx, index);
}
- _ => unimplemented!(
- "trans_ptr_binop({:?}, <fat ptr>, <fat ptr>) not implemented",
- bin_op
- ),
- };
-
- assert_eq!(fx.tcx.types.bool, ret_ty);
- let ret_layout = fx.layout_of(ret_ty);
- CValue::ByVal(fx.bcx.ins().bint(types::I8, res), ret_layout)
- }
-}
-
-pub fn trans_place<'a, 'tcx: 'a>(
- fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
- place: &Place<'tcx>,
-) -> CPlace<'tcx> {
- match place {
- Place::Base(base) => match base {
- PlaceBase::Local(local) => fx.get_local_place(*local),
- PlaceBase::Promoted(data) => crate::constant::trans_promoted(fx, data.0, data.1),
- PlaceBase::Static(static_) => crate::constant::codegen_static_ref(fx, static_),
- }
- Place::Projection(projection) => {
- let base = trans_place(fx, &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).unwrap_usize(fx.tcx);
- CPlace::Addr(
- fx.bcx.ins().iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
- None,
- 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::Addr(
- fx.bcx.ins().iadd_imm(ptr, elem_layout.size.bytes() as i64 * from as i64),
- Some(fx.bcx.ins().iadd_imm(len, -(from as i64 + to as i64))),
- base.layout(),
- )
- }
- _ => unreachable!(),
+ 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!(),
}
- ProjectionElem::Downcast(_adt_def, variant) => base.downcast_variant(fx, variant),
+ }
+ PlaceElem::Downcast(_adt_def, variant) => {
+ cplace = cplace.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