//! Codegen of a single function
-use cranelift_codegen::binemit::{NullStackMapSink, NullTrapSink};
use rustc_ast::InlineAsmOptions;
use rustc_index::vec::IndexVec;
use rustc_middle::ty::adjustment::PointerCast;
use rustc_middle::ty::layout::FnAbiOf;
+use rustc_middle::ty::print::with_no_trimmed_paths;
+
+use indexmap::IndexSet;
use crate::constant::ConstantCx;
use crate::prelude::*;
+use crate::pretty_clif::CommentWriter;
pub(crate) fn codegen_fn<'tcx>(
cx: &mut crate::CodegenCx<'tcx>,
let mir = tcx.instance_mir(instance.def);
let _mir_guard = crate::PrintOnPanic(|| {
let mut buf = Vec::new();
- rustc_middle::mir::write_mir_pretty(tcx, Some(instance.def_id()), &mut buf).unwrap();
+ with_no_trimmed_paths!({
+ rustc_middle::mir::pretty::write_mir_fn(tcx, mir, &mut |_, _| Ok(()), &mut buf)
+ .unwrap();
+ });
String::from_utf8_lossy(&buf).into_owned()
});
let arg_uninhabited = fx
.mir
.args_iter()
- .any(|arg| fx.layout_of(fx.monomorphize(&fx.mir.local_decls[arg].ty)).abi.is_uninhabited());
+ .any(|arg| fx.layout_of(fx.monomorphize(fx.mir.local_decls[arg].ty)).abi.is_uninhabited());
if !crate::constant::check_constants(&mut fx) {
fx.bcx.append_block_params_for_function_params(fx.block_map[START_BLOCK]);
} else if arg_uninhabited {
fx.bcx.append_block_params_for_function_params(fx.block_map[START_BLOCK]);
fx.bcx.switch_to_block(fx.block_map[START_BLOCK]);
- crate::trap::trap_unreachable(&mut fx, "function has uninhabited argument");
+ fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
} else {
tcx.sess.time("codegen clif ir", || {
tcx.sess
// Recover all necessary data from fx, before accessing func will prevent future access to it.
let instance = fx.instance;
- let mut clif_comments = fx.clif_comments;
+ let clif_comments = fx.clif_comments;
let source_info_set = fx.source_info_set;
let local_map = fx.local_map;
fx.constants_cx.finalize(fx.tcx, &mut *fx.module);
- // Store function in context
- let context = &mut cx.cached_context;
- context.func = func;
-
crate::pretty_clif::write_clif_file(
tcx,
"unopt",
module.isa(),
instance,
- &context,
+ &func,
&clif_comments,
);
// Verify function
- verify_func(tcx, &clif_comments, &context.func);
+ verify_func(tcx, &clif_comments, &func);
+
+ compile_fn(
+ cx,
+ module,
+ instance,
+ symbol_name.name,
+ func_id,
+ func,
+ clif_comments,
+ source_info_set,
+ local_map,
+ );
+}
+
+fn compile_fn<'tcx>(
+ cx: &mut crate::CodegenCx<'tcx>,
+ module: &mut dyn Module,
+ instance: Instance<'tcx>,
+ symbol_name: &str,
+ func_id: FuncId,
+ func: Function,
+ mut clif_comments: CommentWriter,
+ source_info_set: IndexSet<SourceInfo>,
+ local_map: IndexVec<mir::Local, CPlace<'tcx>>,
+) {
+ let tcx = cx.tcx;
+
+ // Store function in context
+ let context = &mut cx.cached_context;
+ context.clear();
+ context.func = func;
// If the return block is not reachable, then the SSA builder may have inserted an `iconst.i128`
// instruction, which doesn't have an encoding.
);
});
+ #[cfg(any())] // This is never true
+ let _clif_guard = {
+ use std::fmt::Write;
+
+ let func_clone = context.func.clone();
+ let clif_comments_clone = clif_comments.clone();
+ let mut clif = String::new();
+ for flag in module.isa().flags().iter() {
+ writeln!(clif, "set {}", flag).unwrap();
+ }
+ write!(clif, "target {}", module.isa().triple().architecture.to_string()).unwrap();
+ for isa_flag in module.isa().isa_flags().iter() {
+ write!(clif, " {}", isa_flag).unwrap();
+ }
+ writeln!(clif, "\n").unwrap();
+ crate::PrintOnPanic(move || {
+ let mut clif = clif.clone();
+ ::cranelift_codegen::write::decorate_function(
+ &mut &clif_comments_clone,
+ &mut clif,
+ &func_clone,
+ )
+ .unwrap();
+ clif
+ })
+ };
+
// Define function
tcx.sess.time("define function", || {
context.want_disasm = crate::pretty_clif::should_write_ir(tcx);
- module
- .define_function(func_id, context, &mut NullTrapSink {}, &mut NullStackMapSink {})
- .unwrap()
+ module.define_function(func_id, context).unwrap();
});
// Write optimized function to file for debugging
"opt",
module.isa(),
instance,
- &context,
+ &context.func,
&clif_comments,
);
debug_context.define_function(
instance,
func_id,
- symbol_name.name,
+ symbol_name,
isa,
context,
&source_info_set,
}
unwind_context.add_function(func_id, &context, isa);
});
-
- // Clear context to make it usable for the next function
- context.clear();
}
pub(crate) fn verify_func(
if fx.clif_comments.enabled() {
let mut terminator_head = "\n".to_string();
- bb_data.terminator().kind.fmt_head(&mut terminator_head).unwrap();
+ with_no_trimmed_paths!({
+ bb_data.terminator().kind.fmt_head(&mut terminator_head).unwrap();
+ });
let inst = fx.bcx.func.layout.last_inst(block).unwrap();
fx.add_comment(inst, terminator_head);
}
let target = fx.get_block(*target);
let failure = fx.bcx.create_block();
- // FIXME Mark failure block as cold once Cranelift supports it
+ fx.bcx.set_cold_block(failure);
if *expected {
fx.bcx.ins().brz(cond, failure, &[]);
AssertKind::BoundsCheck { ref len, ref index } => {
let len = codegen_operand(fx, len).load_scalar(fx);
let index = codegen_operand(fx, index).load_scalar(fx);
- let location = fx.get_caller_location(source_info.span).load_scalar(fx);
+ let location = fx.get_caller_location(source_info).load_scalar(fx);
codegen_panic_inner(
fx,
}
_ => {
let msg_str = msg.description();
- codegen_panic(fx, msg_str, source_info.span);
+ codegen_panic(fx, msg_str, source_info);
}
}
}
func,
args,
destination,
+ target,
fn_span,
cleanup: _,
from_hir_call: _,
} => {
fx.tcx.sess.time("codegen call", || {
- crate::abi::codegen_terminator_call(fx, *fn_span, func, args, *destination)
+ crate::abi::codegen_terminator_call(
+ fx,
+ mir::SourceInfo { span: *fn_span, ..source_info },
+ func,
+ args,
+ *destination,
+ *target,
+ )
});
}
TerminatorKind::InlineAsm {
fx.bcx.ins().jump(destination_block, &[]);
}
None => {
- crate::trap::trap_unreachable(
- fx,
- "[corruption] Returned from noreturn inline asm",
- );
+ fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
}
}
}
TerminatorKind::Resume | TerminatorKind::Abort => {
- trap_unreachable(fx, "[corruption] Unwinding bb reached.");
+ // FIXME implement unwinding
+ fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
}
TerminatorKind::Unreachable => {
- trap_unreachable(fx, "[corruption] Hit unreachable code.");
+ fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
}
TerminatorKind::Yield { .. }
| TerminatorKind::FalseEdge { .. }
}
TerminatorKind::Drop { place, target, unwind: _ } => {
let drop_place = codegen_place(fx, *place);
- crate::abi::codegen_drop(fx, source_info.span, drop_place);
+ crate::abi::codegen_drop(fx, source_info, drop_place);
let target_block = fx.get_block(*target);
fx.bcx.ins().jump(target_block, &[]);
fx.set_debug_loc(stmt.source_info);
- #[cfg(disabled)]
+ #[cfg(any())] // This is never true
match &stmt.kind {
StatementKind::StorageLive(..) | StatementKind::StorageDead(..) => {} // Those are not very useful
_ => {
let val = codegen_operand(fx, operand);
lval.write_cvalue(fx, val);
}
+ Rvalue::CopyForDeref(place) => {
+ let cplace = codegen_place(fx, place);
+ let val = cplace.to_cvalue(fx);
+ lval.write_cvalue(fx, val)
+ }
Rvalue::Ref(_, _, place) | Rvalue::AddressOf(_, place) => {
let place = codegen_place(fx, place);
let ref_ = place.place_ref(fx, lval.layout());
let operand = codegen_operand(fx, operand);
lval.write_cvalue(fx, operand.cast_pointer_to(to_layout));
}
- Rvalue::Cast(CastKind::Misc, ref operand, to_ty) => {
+ Rvalue::Cast(
+ CastKind::Misc
+ | CastKind::PointerExposeAddress
+ | CastKind::PointerFromExposedAddress,
+ ref operand,
+ to_ty,
+ ) => {
let operand = codegen_operand(fx, operand);
let from_ty = operand.layout().ty;
let to_ty = fx.monomorphize(to_ty);
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.kind() {
- // enum -> discriminant value
- assert!(adt_def.is_enum());
- match to_ty.kind() {
- ty::Uint(_) | ty::Int(_) => {}
- _ => unreachable!("cast adt {} -> {}", from_ty, to_ty),
- }
- let to_clif_ty = fx.clif_type(to_ty).unwrap();
-
- let discriminant = crate::discriminant::codegen_get_discriminant(
- fx,
- operand,
- fx.layout_of(operand.layout().ty.discriminant_ty(fx.tcx)),
- )
- .load_scalar(fx);
-
- let res = crate::cast::clif_intcast(
- fx,
- discriminant,
- to_clif_ty,
- to_ty.is_signed(),
- );
- lval.write_cvalue(fx, CValue::by_val(res, dest_layout));
} else {
let to_clif_ty = fx.clif_type(to_ty).unwrap();
let from = operand.load_scalar(fx);
substs,
ty::ClosureKind::FnOnce,
)
+ .expect("failed to normalize and resolve closure during codegen")
.polymorphize(fx.tcx);
let func_ref = fx.get_function_ref(instance);
let func_addr = fx.bcx.ins().func_addr(fx.pointer_type, func_ref);
let times = fx
.monomorphize(times)
.eval(fx.tcx, ParamEnv::reveal_all())
- .val
+ .kind()
.try_to_bits(fx.tcx.data_layout.pointer_size)
.unwrap();
if operand.layout().size.bytes() == 0 {
let operand = operand.load_scalar(fx);
lval.write_cvalue(fx, CValue::by_val(operand, box_layout));
}
- Rvalue::NullaryOp(NullOp::Box, content_ty) => {
- let usize_type = fx.clif_type(fx.tcx.types.usize).unwrap();
- let content_ty = fx.monomorphize(content_ty);
- let layout = fx.layout_of(content_ty);
- let llsize = fx.bcx.ins().iconst(usize_type, layout.size.bytes() as i64);
- let llalign = fx.bcx.ins().iconst(usize_type, layout.align.abi.bytes() as i64);
- let box_layout = fx.layout_of(fx.tcx.mk_box(content_ty));
-
- // Allocate space:
- let def_id =
- match fx.tcx.lang_items().require(rustc_hir::LangItem::ExchangeMalloc) {
- Ok(id) => id,
- Err(s) => {
- fx.tcx
- .sess
- .fatal(&format!("allocation of `{}` {}", box_layout.ty, s));
- }
- };
- let instance = ty::Instance::mono(fx.tcx, def_id).polymorphize(fx.tcx);
- 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::by_val(ptr, box_layout));
- }
Rvalue::NullaryOp(null_op, ty) => {
assert!(
lval.layout()
let val = match null_op {
NullOp::SizeOf => layout.size.bytes(),
NullOp::AlignOf => layout.align.abi.bytes(),
- NullOp::Box => unreachable!(),
};
let val = CValue::const_val(fx, fx.layout_of(fx.tcx.types.usize), val.into());
lval.write_cvalue(fx, val);
}
StatementKind::StorageLive(_)
| StatementKind::StorageDead(_)
+ | StatementKind::Deinit(_)
| StatementKind::Nop
| StatementKind::FakeRead(..)
| StatementKind::Retag { .. }
| StatementKind::AscribeUserType(..) => {}
- StatementKind::LlvmInlineAsm(asm) => {
- match asm.asm.asm.as_str().trim() {
- "" => {
- // Black box
- }
- _ => fx.tcx.sess.span_fatal(
- stmt.source_info.span,
- "Legacy `llvm_asm!` inline assembly is not supported. \
- Try using the new `asm!` instead.",
- ),
- }
- }
StatementKind::Coverage { .. } => fx.tcx.sess.fatal("-Zcoverage is unimplemented"),
StatementKind::CopyNonOverlapping(inner) => {
let dst = codegen_operand(fx, &inner.dst);
PlaceElem::Deref => {
cplace = cplace.place_deref(fx);
}
+ PlaceElem::OpaqueCast(ty) => cplace = cplace.place_opaque_cast(fx, ty),
PlaceElem::Field(field, _ty) => {
cplace = cplace.place_field(fx, field);
}
match cplace.layout().ty.kind() {
ty::Array(elem_ty, _len) => {
assert!(!from_end, "array subslices are never `from_end`");
- let elem_layout = fx.layout_of(elem_ty);
+ let elem_layout = fx.layout_of(*elem_ty);
let ptr = cplace.to_ptr();
cplace = CPlace::for_ptr(
ptr.offset_i64(fx, elem_layout.size.bytes() as i64 * (from as i64)),
- fx.layout_of(fx.tcx.mk_array(elem_ty, to - from)),
+ fx.layout_of(fx.tcx.mk_array(*elem_ty, to - from)),
);
}
ty::Slice(elem_ty) => {
assert!(from_end, "slice subslices should be `from_end`");
- let elem_layout = fx.layout_of(elem_ty);
+ let elem_layout = fx.layout_of(*elem_ty);
let (ptr, len) = cplace.to_ptr_maybe_unsized();
let len = len.unwrap();
cplace = CPlace::for_ptr_with_extra(
}
}
-pub(crate) fn codegen_panic<'tcx>(fx: &mut FunctionCx<'_, '_, 'tcx>, msg_str: &str, span: Span) {
- let location = fx.get_caller_location(span).load_scalar(fx);
+pub(crate) fn codegen_panic<'tcx>(
+ fx: &mut FunctionCx<'_, '_, 'tcx>,
+ msg_str: &str,
+ source_info: mir::SourceInfo,
+) {
+ let location = fx.get_caller_location(source_info).load_scalar(fx);
let msg_ptr = fx.anonymous_str(msg_str);
let msg_len = fx.bcx.ins().iconst(fx.pointer_type, i64::try_from(msg_str.len()).unwrap());
let args = [msg_ptr, msg_len, location];
- codegen_panic_inner(fx, rustc_hir::LangItem::Panic, &args, span);
+ codegen_panic_inner(fx, rustc_hir::LangItem::Panic, &args, source_info.span);
}
pub(crate) fn codegen_panic_inner<'tcx>(
args,
);
- crate::trap::trap_unreachable(fx, "panic lang item returned");
+ fx.bcx.ins().trap(TrapCode::UnreachableCodeReached);
}