diff options
Diffstat (limited to 'compiler/rustc_middle/src/mir/pretty.rs')
| -rw-r--r-- | compiler/rustc_middle/src/mir/pretty.rs | 1251 |
1 files changed, 980 insertions, 271 deletions
diff --git a/compiler/rustc_middle/src/mir/pretty.rs b/compiler/rustc_middle/src/mir/pretty.rs index 773056e8a..f032fd29d 100644 --- a/compiler/rustc_middle/src/mir/pretty.rs +++ b/compiler/rustc_middle/src/mir/pretty.rs @@ -1,19 +1,19 @@ use std::collections::BTreeSet; -use std::fmt::Display; -use std::fmt::Write as _; +use std::fmt::{self, Debug, Display, Write as _}; use std::fs; -use std::io::{self, Write}; +use std::io::{self, Write as _}; use std::path::{Path, PathBuf}; use super::graphviz::write_mir_fn_graphviz; use super::spanview::write_mir_fn_spanview; use either::Either; +use rustc_ast::InlineAsmTemplatePiece; use rustc_data_structures::fx::FxHashMap; use rustc_hir::def_id::DefId; use rustc_index::Idx; use rustc_middle::mir::interpret::{ - alloc_range, read_target_uint, AllocBytes, AllocId, Allocation, ConstAllocation, ConstValue, - GlobalAlloc, Pointer, Provenance, + alloc_range, read_target_uint, AllocBytes, AllocId, Allocation, ConstAllocation, GlobalAlloc, + Pointer, Provenance, }; use rustc_middle::mir::visit::Visitor; use rustc_middle::mir::*; @@ -79,7 +79,7 @@ pub fn dump_mir<'tcx, F>( body: &Body<'tcx>, extra_data: F, ) where - F: FnMut(PassWhere, &mut dyn Write) -> io::Result<()>, + F: FnMut(PassWhere, &mut dyn io::Write) -> io::Result<()>, { if !dump_enabled(tcx, pass_name, body.source.def_id()) { return; @@ -116,7 +116,7 @@ fn dump_matched_mir_node<'tcx, F>( body: &Body<'tcx>, mut extra_data: F, ) where - F: FnMut(PassWhere, &mut dyn Write) -> io::Result<()>, + F: FnMut(PassWhere, &mut dyn io::Write) -> io::Result<()>, { let _: io::Result<()> = try { let mut file = create_dump_file(tcx, "mir", pass_num, pass_name, disambiguator, body)?; @@ -260,11 +260,14 @@ pub fn create_dump_file<'tcx>( ) } +/////////////////////////////////////////////////////////////////////////// +// Whole MIR bodies + /// Write out a human-readable textual representation for the given MIR. pub fn write_mir_pretty<'tcx>( tcx: TyCtxt<'tcx>, single: Option<DefId>, - w: &mut dyn Write, + w: &mut dyn io::Write, ) -> io::Result<()> { writeln!(w, "// WARNING: This output format is intended for human consumers only")?; writeln!(w, "// and is subject to change without notice. Knock yourself out.")?; @@ -278,7 +281,7 @@ pub fn write_mir_pretty<'tcx>( writeln!(w)?; } - let render_body = |w: &mut dyn Write, body| -> io::Result<()> { + let render_body = |w: &mut dyn io::Write, body| -> io::Result<()> { write_mir_fn(tcx, body, &mut |_, _| Ok(()), w)?; for body in tcx.promoted_mir(def_id) { @@ -309,10 +312,10 @@ pub fn write_mir_fn<'tcx, F>( tcx: TyCtxt<'tcx>, body: &Body<'tcx>, extra_data: &mut F, - w: &mut dyn Write, + w: &mut dyn io::Write, ) -> io::Result<()> where - F: FnMut(PassWhere, &mut dyn Write) -> io::Result<()>, + F: FnMut(PassWhere, &mut dyn io::Write) -> io::Result<()>, { write_mir_intro(tcx, body, w)?; for block in body.basic_blocks.indices() { @@ -330,16 +333,267 @@ where Ok(()) } +/// Prints local variables in a scope tree. +fn write_scope_tree( + tcx: TyCtxt<'_>, + body: &Body<'_>, + scope_tree: &FxHashMap<SourceScope, Vec<SourceScope>>, + w: &mut dyn io::Write, + parent: SourceScope, + depth: usize, +) -> io::Result<()> { + let indent = depth * INDENT.len(); + + // Local variable debuginfo. + for var_debug_info in &body.var_debug_info { + if var_debug_info.source_info.scope != parent { + // Not declared in this scope. + continue; + } + + let indented_debug_info = format!("{0:1$}debug {2:?};", INDENT, indent, var_debug_info); + + if tcx.sess.opts.unstable_opts.mir_include_spans { + writeln!( + w, + "{0:1$} // in {2}", + indented_debug_info, + ALIGN, + comment(tcx, var_debug_info.source_info), + )?; + } else { + writeln!(w, "{indented_debug_info}")?; + } + } + + // Local variable types. + for (local, local_decl) in body.local_decls.iter_enumerated() { + if (1..body.arg_count + 1).contains(&local.index()) { + // Skip over argument locals, they're printed in the signature. + continue; + } + + if local_decl.source_info.scope != parent { + // Not declared in this scope. + continue; + } + + let mut_str = local_decl.mutability.prefix_str(); + + let mut indented_decl = ty::print::with_no_trimmed_paths!(format!( + "{0:1$}let {2}{3:?}: {4}", + INDENT, indent, mut_str, local, local_decl.ty + )); + if let Some(user_ty) = &local_decl.user_ty { + for user_ty in user_ty.projections() { + write!(indented_decl, " as {user_ty:?}").unwrap(); + } + } + indented_decl.push(';'); + + let local_name = if local == RETURN_PLACE { " return place" } else { "" }; + + if tcx.sess.opts.unstable_opts.mir_include_spans { + writeln!( + w, + "{0:1$} //{2} in {3}", + indented_decl, + ALIGN, + local_name, + comment(tcx, local_decl.source_info), + )?; + } else { + writeln!(w, "{indented_decl}",)?; + } + } + + let Some(children) = scope_tree.get(&parent) else { + return Ok(()); + }; + + for &child in children { + let child_data = &body.source_scopes[child]; + assert_eq!(child_data.parent_scope, Some(parent)); + + let (special, span) = if let Some((callee, callsite_span)) = child_data.inlined { + ( + format!( + " (inlined {}{})", + if callee.def.requires_caller_location(tcx) { "#[track_caller] " } else { "" }, + callee + ), + Some(callsite_span), + ) + } else { + (String::new(), None) + }; + + let indented_header = format!("{0:1$}scope {2}{3} {{", "", indent, child.index(), special); + + if tcx.sess.opts.unstable_opts.mir_include_spans { + if let Some(span) = span { + writeln!( + w, + "{0:1$} // at {2}", + indented_header, + ALIGN, + tcx.sess.source_map().span_to_embeddable_string(span), + )?; + } else { + writeln!(w, "{indented_header}")?; + } + } else { + writeln!(w, "{indented_header}")?; + } + + write_scope_tree(tcx, body, scope_tree, w, child, depth + 1)?; + writeln!(w, "{0:1$}}}", "", depth * INDENT.len())?; + } + + Ok(()) +} + +impl Debug for VarDebugInfo<'_> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + if let Some(box VarDebugInfoFragment { ty, ref projection }) = self.composite { + pre_fmt_projection(&projection[..], fmt)?; + write!(fmt, "({}: {})", self.name, ty)?; + post_fmt_projection(&projection[..], fmt)?; + } else { + write!(fmt, "{}", self.name)?; + } + + write!(fmt, " => {:?}", self.value) + } +} + +/// Write out a human-readable textual representation of the MIR's `fn` type and the types of its +/// local variables (both user-defined bindings and compiler temporaries). +pub fn write_mir_intro<'tcx>( + tcx: TyCtxt<'tcx>, + body: &Body<'_>, + w: &mut dyn io::Write, +) -> io::Result<()> { + write_mir_sig(tcx, body, w)?; + writeln!(w, "{{")?; + + // construct a scope tree and write it out + let mut scope_tree: FxHashMap<SourceScope, Vec<SourceScope>> = Default::default(); + for (index, scope_data) in body.source_scopes.iter().enumerate() { + if let Some(parent) = scope_data.parent_scope { + scope_tree.entry(parent).or_default().push(SourceScope::new(index)); + } else { + // Only the argument scope has no parent, because it's the root. + assert_eq!(index, OUTERMOST_SOURCE_SCOPE.index()); + } + } + + write_scope_tree(tcx, body, &scope_tree, w, OUTERMOST_SOURCE_SCOPE, 1)?; + + // Add an empty line before the first block is printed. + writeln!(w)?; + + Ok(()) +} + +fn write_mir_sig(tcx: TyCtxt<'_>, body: &Body<'_>, w: &mut dyn io::Write) -> io::Result<()> { + use rustc_hir::def::DefKind; + + trace!("write_mir_sig: {:?}", body.source.instance); + let def_id = body.source.def_id(); + let kind = tcx.def_kind(def_id); + let is_function = match kind { + DefKind::Fn | DefKind::AssocFn | DefKind::Ctor(..) => true, + _ => tcx.is_closure(def_id), + }; + match (kind, body.source.promoted) { + (_, Some(i)) => write!(w, "{i:?} in ")?, + (DefKind::Const | DefKind::AssocConst, _) => write!(w, "const ")?, + (DefKind::Static(hir::Mutability::Not), _) => write!(w, "static ")?, + (DefKind::Static(hir::Mutability::Mut), _) => write!(w, "static mut ")?, + (_, _) if is_function => write!(w, "fn ")?, + (DefKind::AnonConst | DefKind::InlineConst, _) => {} // things like anon const, not an item + _ => bug!("Unexpected def kind {:?}", kind), + } + + ty::print::with_forced_impl_filename_line! { + // see notes on #41697 elsewhere + write!(w, "{}", tcx.def_path_str(def_id))? + } + + if body.source.promoted.is_none() && is_function { + write!(w, "(")?; + + // fn argument types. + for (i, arg) in body.args_iter().enumerate() { + if i != 0 { + write!(w, ", ")?; + } + write!(w, "{:?}: {}", Place::from(arg), body.local_decls[arg].ty)?; + } + + write!(w, ") -> {}", body.return_ty())?; + } else { + assert_eq!(body.arg_count, 0); + write!(w, ": {} =", body.return_ty())?; + } + + if let Some(yield_ty) = body.yield_ty() { + writeln!(w)?; + writeln!(w, "yields {yield_ty}")?; + } + + write!(w, " ")?; + // Next thing that gets printed is the opening { + + Ok(()) +} + +fn write_user_type_annotations( + tcx: TyCtxt<'_>, + body: &Body<'_>, + w: &mut dyn io::Write, +) -> io::Result<()> { + if !body.user_type_annotations.is_empty() { + writeln!(w, "| User Type Annotations")?; + } + for (index, annotation) in body.user_type_annotations.iter_enumerated() { + writeln!( + w, + "| {:?}: user_ty: {}, span: {}, inferred_ty: {}", + index.index(), + annotation.user_ty, + tcx.sess.source_map().span_to_embeddable_string(annotation.span), + with_no_trimmed_paths!(format!("{}", annotation.inferred_ty)), + )?; + } + if !body.user_type_annotations.is_empty() { + writeln!(w, "|")?; + } + Ok(()) +} + +pub fn dump_mir_def_ids(tcx: TyCtxt<'_>, single: Option<DefId>) -> Vec<DefId> { + if let Some(i) = single { + vec![i] + } else { + tcx.mir_keys(()).iter().map(|def_id| def_id.to_def_id()).collect() + } +} + +/////////////////////////////////////////////////////////////////////////// +// Basic blocks and their parts (statements, terminators, ...) + /// Write out a human-readable textual representation for the given basic block. pub fn write_basic_block<'tcx, F>( tcx: TyCtxt<'tcx>, block: BasicBlock, body: &Body<'tcx>, extra_data: &mut F, - w: &mut dyn Write, + w: &mut dyn io::Write, ) -> io::Result<()> where - F: FnMut(PassWhere, &mut dyn Write) -> io::Result<()>, + F: FnMut(PassWhere, &mut dyn io::Write) -> io::Result<()>, { let data = &body[block]; @@ -400,10 +654,528 @@ where writeln!(w, "{INDENT}}}") } +impl Debug for Statement<'_> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + use self::StatementKind::*; + match self.kind { + Assign(box (ref place, ref rv)) => write!(fmt, "{place:?} = {rv:?}"), + FakeRead(box (ref cause, ref place)) => { + write!(fmt, "FakeRead({cause:?}, {place:?})") + } + Retag(ref kind, ref place) => write!( + fmt, + "Retag({}{:?})", + match kind { + RetagKind::FnEntry => "[fn entry] ", + RetagKind::TwoPhase => "[2phase] ", + RetagKind::Raw => "[raw] ", + RetagKind::Default => "", + }, + place, + ), + StorageLive(ref place) => write!(fmt, "StorageLive({place:?})"), + StorageDead(ref place) => write!(fmt, "StorageDead({place:?})"), + SetDiscriminant { ref place, variant_index } => { + write!(fmt, "discriminant({place:?}) = {variant_index:?}") + } + Deinit(ref place) => write!(fmt, "Deinit({place:?})"), + PlaceMention(ref place) => { + write!(fmt, "PlaceMention({place:?})") + } + AscribeUserType(box (ref place, ref c_ty), ref variance) => { + write!(fmt, "AscribeUserType({place:?}, {variance:?}, {c_ty:?})") + } + Coverage(box self::Coverage { ref kind, code_region: Some(ref rgn) }) => { + write!(fmt, "Coverage::{kind:?} for {rgn:?}") + } + Coverage(box ref coverage) => write!(fmt, "Coverage::{:?}", coverage.kind), + Intrinsic(box ref intrinsic) => write!(fmt, "{intrinsic}"), + ConstEvalCounter => write!(fmt, "ConstEvalCounter"), + Nop => write!(fmt, "nop"), + } + } +} + +impl Display for NonDivergingIntrinsic<'_> { + fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { + match self { + Self::Assume(op) => write!(f, "assume({op:?})"), + Self::CopyNonOverlapping(CopyNonOverlapping { src, dst, count }) => { + write!(f, "copy_nonoverlapping(dst = {dst:?}, src = {src:?}, count = {count:?})") + } + } + } +} + +impl<'tcx> Debug for TerminatorKind<'tcx> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + self.fmt_head(fmt)?; + let successor_count = self.successors().count(); + let labels = self.fmt_successor_labels(); + assert_eq!(successor_count, labels.len()); + + // `Cleanup` is already included in successors + let show_unwind = !matches!(self.unwind(), None | Some(UnwindAction::Cleanup(_))); + let fmt_unwind = |fmt: &mut Formatter<'_>| -> fmt::Result { + write!(fmt, "unwind ")?; + match self.unwind() { + // Not needed or included in successors + None | Some(UnwindAction::Cleanup(_)) => unreachable!(), + Some(UnwindAction::Continue) => write!(fmt, "continue"), + Some(UnwindAction::Unreachable) => write!(fmt, "unreachable"), + Some(UnwindAction::Terminate(reason)) => { + write!(fmt, "terminate({})", reason.as_short_str()) + } + } + }; + + match (successor_count, show_unwind) { + (0, false) => Ok(()), + (0, true) => { + write!(fmt, " -> ")?; + fmt_unwind(fmt) + } + (1, false) => write!(fmt, " -> {:?}", self.successors().next().unwrap()), + _ => { + write!(fmt, " -> [")?; + for (i, target) in self.successors().enumerate() { + if i > 0 { + write!(fmt, ", ")?; + } + write!(fmt, "{}: {:?}", labels[i], target)?; + } + if show_unwind { + write!(fmt, ", ")?; + fmt_unwind(fmt)?; + } + write!(fmt, "]") + } + } + } +} + +impl<'tcx> TerminatorKind<'tcx> { + /// Writes the "head" part of the terminator; that is, its name and the data it uses to pick the + /// successor basic block, if any. The only information not included is the list of possible + /// successors, which may be rendered differently between the text and the graphviz format. + pub fn fmt_head<W: fmt::Write>(&self, fmt: &mut W) -> fmt::Result { + use self::TerminatorKind::*; + match self { + Goto { .. } => write!(fmt, "goto"), + SwitchInt { discr, .. } => write!(fmt, "switchInt({discr:?})"), + Return => write!(fmt, "return"), + GeneratorDrop => write!(fmt, "generator_drop"), + UnwindResume => write!(fmt, "resume"), + UnwindTerminate(reason) => { + write!(fmt, "abort({})", reason.as_short_str()) + } + Yield { value, resume_arg, .. } => write!(fmt, "{resume_arg:?} = yield({value:?})"), + Unreachable => write!(fmt, "unreachable"), + Drop { place, .. } => write!(fmt, "drop({place:?})"), + Call { func, args, destination, .. } => { + write!(fmt, "{destination:?} = ")?; + write!(fmt, "{func:?}(")?; + for (index, arg) in args.iter().enumerate() { + if index > 0 { + write!(fmt, ", ")?; + } + write!(fmt, "{arg:?}")?; + } + write!(fmt, ")") + } + Assert { cond, expected, msg, .. } => { + write!(fmt, "assert(")?; + if !expected { + write!(fmt, "!")?; + } + write!(fmt, "{cond:?}, ")?; + msg.fmt_assert_args(fmt)?; + write!(fmt, ")") + } + FalseEdge { .. } => write!(fmt, "falseEdge"), + FalseUnwind { .. } => write!(fmt, "falseUnwind"), + InlineAsm { template, ref operands, options, .. } => { + write!(fmt, "asm!(\"{}\"", InlineAsmTemplatePiece::to_string(template))?; + for op in operands { + write!(fmt, ", ")?; + let print_late = |&late| if late { "late" } else { "" }; + match op { + InlineAsmOperand::In { reg, value } => { + write!(fmt, "in({reg}) {value:?}")?; + } + InlineAsmOperand::Out { reg, late, place: Some(place) } => { + write!(fmt, "{}out({}) {:?}", print_late(late), reg, place)?; + } + InlineAsmOperand::Out { reg, late, place: None } => { + write!(fmt, "{}out({}) _", print_late(late), reg)?; + } + InlineAsmOperand::InOut { + reg, + late, + in_value, + out_place: Some(out_place), + } => { + write!( + fmt, + "in{}out({}) {:?} => {:?}", + print_late(late), + reg, + in_value, + out_place + )?; + } + InlineAsmOperand::InOut { reg, late, in_value, out_place: None } => { + write!(fmt, "in{}out({}) {:?} => _", print_late(late), reg, in_value)?; + } + InlineAsmOperand::Const { value } => { + write!(fmt, "const {value:?}")?; + } + InlineAsmOperand::SymFn { value } => { + write!(fmt, "sym_fn {value:?}")?; + } + InlineAsmOperand::SymStatic { def_id } => { + write!(fmt, "sym_static {def_id:?}")?; + } + } + } + write!(fmt, ", options({options:?}))") + } + } + } + + /// Returns the list of labels for the edges to the successor basic blocks. + pub fn fmt_successor_labels(&self) -> Vec<Cow<'static, str>> { + use self::TerminatorKind::*; + match *self { + Return | UnwindResume | UnwindTerminate(_) | Unreachable | GeneratorDrop => vec![], + Goto { .. } => vec!["".into()], + SwitchInt { ref targets, .. } => targets + .values + .iter() + .map(|&u| Cow::Owned(u.to_string())) + .chain(iter::once("otherwise".into())) + .collect(), + Call { target: Some(_), unwind: UnwindAction::Cleanup(_), .. } => { + vec!["return".into(), "unwind".into()] + } + Call { target: Some(_), unwind: _, .. } => vec!["return".into()], + Call { target: None, unwind: UnwindAction::Cleanup(_), .. } => vec!["unwind".into()], + Call { target: None, unwind: _, .. } => vec![], + Yield { drop: Some(_), .. } => vec!["resume".into(), "drop".into()], + Yield { drop: None, .. } => vec!["resume".into()], + Drop { unwind: UnwindAction::Cleanup(_), .. } => vec!["return".into(), "unwind".into()], + Drop { unwind: _, .. } => vec!["return".into()], + Assert { unwind: UnwindAction::Cleanup(_), .. } => { + vec!["success".into(), "unwind".into()] + } + Assert { unwind: _, .. } => vec!["success".into()], + FalseEdge { .. } => vec!["real".into(), "imaginary".into()], + FalseUnwind { unwind: UnwindAction::Cleanup(_), .. } => { + vec!["real".into(), "unwind".into()] + } + FalseUnwind { unwind: _, .. } => vec!["real".into()], + InlineAsm { destination: Some(_), unwind: UnwindAction::Cleanup(_), .. } => { + vec!["return".into(), "unwind".into()] + } + InlineAsm { destination: Some(_), unwind: _, .. } => { + vec!["return".into()] + } + InlineAsm { destination: None, unwind: UnwindAction::Cleanup(_), .. } => { + vec!["unwind".into()] + } + InlineAsm { destination: None, unwind: _, .. } => vec![], + } + } +} + +impl<'tcx> Debug for Rvalue<'tcx> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + use self::Rvalue::*; + + match *self { + Use(ref place) => write!(fmt, "{place:?}"), + Repeat(ref a, b) => { + write!(fmt, "[{a:?}; ")?; + pretty_print_const(b, fmt, false)?; + write!(fmt, "]") + } + Len(ref a) => write!(fmt, "Len({a:?})"), + Cast(ref kind, ref place, ref ty) => { + with_no_trimmed_paths!(write!(fmt, "{place:?} as {ty} ({kind:?})")) + } + BinaryOp(ref op, box (ref a, ref b)) => write!(fmt, "{op:?}({a:?}, {b:?})"), + CheckedBinaryOp(ref op, box (ref a, ref b)) => { + write!(fmt, "Checked{op:?}({a:?}, {b:?})") + } + UnaryOp(ref op, ref a) => write!(fmt, "{op:?}({a:?})"), + Discriminant(ref place) => write!(fmt, "discriminant({place:?})"), + NullaryOp(ref op, ref t) => { + let t = with_no_trimmed_paths!(format!("{}", t)); + match op { + NullOp::SizeOf => write!(fmt, "SizeOf({t})"), + NullOp::AlignOf => write!(fmt, "AlignOf({t})"), + NullOp::OffsetOf(fields) => write!(fmt, "OffsetOf({t}, {fields:?})"), + } + } + ThreadLocalRef(did) => ty::tls::with(|tcx| { + let muta = tcx.static_mutability(did).unwrap().prefix_str(); + write!(fmt, "&/*tls*/ {}{}", muta, tcx.def_path_str(did)) + }), + Ref(region, borrow_kind, ref place) => { + let kind_str = match borrow_kind { + BorrowKind::Shared => "", + BorrowKind::Fake => "fake ", + BorrowKind::Mut { .. } => "mut ", + }; + + // When printing regions, add trailing space if necessary. + let print_region = ty::tls::with(|tcx| { + tcx.sess.verbose() || tcx.sess.opts.unstable_opts.identify_regions + }); + let region = if print_region { + let mut region = region.to_string(); + if !region.is_empty() { + region.push(' '); + } + region + } else { + // Do not even print 'static + String::new() + }; + write!(fmt, "&{region}{kind_str}{place:?}") + } + + CopyForDeref(ref place) => write!(fmt, "deref_copy {place:#?}"), + + AddressOf(mutability, ref place) => { + let kind_str = match mutability { + Mutability::Mut => "mut", + Mutability::Not => "const", + }; + + write!(fmt, "&raw {kind_str} {place:?}") + } + + Aggregate(ref kind, ref places) => { + let fmt_tuple = |fmt: &mut Formatter<'_>, name: &str| { + let mut tuple_fmt = fmt.debug_tuple(name); + for place in places { + tuple_fmt.field(place); + } + tuple_fmt.finish() + }; + + match **kind { + AggregateKind::Array(_) => write!(fmt, "{places:?}"), + + AggregateKind::Tuple => { + if places.is_empty() { + write!(fmt, "()") + } else { + fmt_tuple(fmt, "") + } + } + + AggregateKind::Adt(adt_did, variant, args, _user_ty, _) => { + ty::tls::with(|tcx| { + let variant_def = &tcx.adt_def(adt_did).variant(variant); + let args = tcx.lift(args).expect("could not lift for printing"); + let name = FmtPrinter::new(tcx, Namespace::ValueNS) + .print_def_path(variant_def.def_id, args)? + .into_buffer(); + + match variant_def.ctor_kind() { + Some(CtorKind::Const) => fmt.write_str(&name), + Some(CtorKind::Fn) => fmt_tuple(fmt, &name), + None => { + let mut struct_fmt = fmt.debug_struct(&name); + for (field, place) in iter::zip(&variant_def.fields, places) { + struct_fmt.field(field.name.as_str(), place); + } + struct_fmt.finish() + } + } + }) + } + + AggregateKind::Closure(def_id, args) => ty::tls::with(|tcx| { + let name = if tcx.sess.opts.unstable_opts.span_free_formats { + let args = tcx.lift(args).unwrap(); + format!("{{closure@{}}}", tcx.def_path_str_with_args(def_id, args),) + } else { + let span = tcx.def_span(def_id); + format!( + "{{closure@{}}}", + tcx.sess.source_map().span_to_diagnostic_string(span) + ) + }; + let mut struct_fmt = fmt.debug_struct(&name); + + // FIXME(project-rfc-2229#48): This should be a list of capture names/places + if let Some(def_id) = def_id.as_local() + && let Some(upvars) = tcx.upvars_mentioned(def_id) + { + for (&var_id, place) in iter::zip(upvars.keys(), places) { + let var_name = tcx.hir().name(var_id); + struct_fmt.field(var_name.as_str(), place); + } + } else { + for (index, place) in places.iter().enumerate() { + struct_fmt.field(&format!("{index}"), place); + } + } + + struct_fmt.finish() + }), + + AggregateKind::Generator(def_id, _, _) => ty::tls::with(|tcx| { + let name = format!("{{generator@{:?}}}", tcx.def_span(def_id)); + let mut struct_fmt = fmt.debug_struct(&name); + + // FIXME(project-rfc-2229#48): This should be a list of capture names/places + if let Some(def_id) = def_id.as_local() + && let Some(upvars) = tcx.upvars_mentioned(def_id) + { + for (&var_id, place) in iter::zip(upvars.keys(), places) { + let var_name = tcx.hir().name(var_id); + struct_fmt.field(var_name.as_str(), place); + } + } else { + for (index, place) in places.iter().enumerate() { + struct_fmt.field(&format!("{index}"), place); + } + } + + struct_fmt.finish() + }), + } + } + + ShallowInitBox(ref place, ref ty) => { + with_no_trimmed_paths!(write!(fmt, "ShallowInitBox({place:?}, {ty})")) + } + } + } +} + +impl<'tcx> Debug for Operand<'tcx> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + use self::Operand::*; + match *self { + Constant(ref a) => write!(fmt, "{a:?}"), + Copy(ref place) => write!(fmt, "{place:?}"), + Move(ref place) => write!(fmt, "move {place:?}"), + } + } +} + +impl<'tcx> Debug for ConstOperand<'tcx> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + write!(fmt, "{self}") + } +} + +impl<'tcx> Display for ConstOperand<'tcx> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + match self.ty().kind() { + ty::FnDef(..) => {} + _ => write!(fmt, "const ")?, + } + Display::fmt(&self.const_, fmt) + } +} + +impl Debug for Place<'_> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + self.as_ref().fmt(fmt) + } +} + +impl Debug for PlaceRef<'_> { + fn fmt(&self, fmt: &mut Formatter<'_>) -> fmt::Result { + pre_fmt_projection(self.projection, fmt)?; + write!(fmt, "{:?}", self.local)?; + post_fmt_projection(self.projection, fmt) + } +} + +fn pre_fmt_projection(projection: &[PlaceElem<'_>], fmt: &mut Formatter<'_>) -> fmt::Result { + for &elem in projection.iter().rev() { + match elem { + ProjectionElem::OpaqueCast(_) + | ProjectionElem::Subtype(_) + | ProjectionElem::Downcast(_, _) + | ProjectionElem::Field(_, _) => { + write!(fmt, "(").unwrap(); + } + ProjectionElem::Deref => { + write!(fmt, "(*").unwrap(); + } + ProjectionElem::Index(_) + | ProjectionElem::ConstantIndex { .. } + | ProjectionElem::Subslice { .. } => {} + } + } + + Ok(()) +} + +fn post_fmt_projection(projection: &[PlaceElem<'_>], fmt: &mut Formatter<'_>) -> fmt::Result { + for &elem in projection.iter() { + match elem { + ProjectionElem::OpaqueCast(ty) => { + write!(fmt, " as {ty})")?; + } + ProjectionElem::Subtype(ty) => { + write!(fmt, " as subtype {ty})")?; + } + ProjectionElem::Downcast(Some(name), _index) => { + write!(fmt, " as {name})")?; + } + ProjectionElem::Downcast(None, index) => { + write!(fmt, " as variant#{index:?})")?; + } + ProjectionElem::Deref => { + write!(fmt, ")")?; + } + ProjectionElem::Field(field, ty) => { + with_no_trimmed_paths!(write!(fmt, ".{:?}: {})", field.index(), ty)?); + } + ProjectionElem::Index(ref index) => { + write!(fmt, "[{index:?}]")?; + } + ProjectionElem::ConstantIndex { offset, min_length, from_end: false } => { + write!(fmt, "[{offset:?} of {min_length:?}]")?; + } + ProjectionElem::ConstantIndex { offset, min_length, from_end: true } => { + write!(fmt, "[-{offset:?} of {min_length:?}]")?; + } + ProjectionElem::Subslice { from, to: 0, from_end: true } => { + write!(fmt, "[{from:?}:]")?; + } + ProjectionElem::Subslice { from: 0, to, from_end: true } => { + write!(fmt, "[:-{to:?}]")?; + } + ProjectionElem::Subslice { from, to, from_end: true } => { + write!(fmt, "[{from:?}:-{to:?}]")?; + } + ProjectionElem::Subslice { from, to, from_end: false } => { + write!(fmt, "[{from:?}..{to:?}]")?; + } + } + } + + Ok(()) +} + /// After we print the main statement, we sometimes dump extra /// information. There's often a lot of little things "nuzzled up" in /// a statement. -fn write_extra<'tcx, F>(tcx: TyCtxt<'tcx>, write: &mut dyn Write, mut visit_op: F) -> io::Result<()> +fn write_extra<'tcx, F>( + tcx: TyCtxt<'tcx>, + write: &mut dyn io::Write, + mut visit_op: F, +) -> io::Result<()> where F: FnMut(&mut ExtraComments<'tcx>), { @@ -443,10 +1215,10 @@ fn use_verbose(ty: Ty<'_>, fn_def: bool) -> bool { } impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> { - fn visit_constant(&mut self, constant: &Constant<'tcx>, _location: Location) { - let Constant { span, user_ty, literal } = constant; - if use_verbose(literal.ty(), true) { - self.push("mir::Constant"); + fn visit_constant(&mut self, constant: &ConstOperand<'tcx>, _location: Location) { + let ConstOperand { span, user_ty, const_ } = constant; + if use_verbose(const_.ty(), true) { + self.push("mir::ConstOperand"); self.push(&format!( "+ span: {}", self.tcx.sess.source_map().span_to_embeddable_string(*span) @@ -455,34 +1227,35 @@ impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> { self.push(&format!("+ user_ty: {user_ty:?}")); } - // FIXME: this is a poor version of `pretty_print_const_value`. - let fmt_val = |val: &ConstValue<'tcx>| match val { - ConstValue::ZeroSized => "<ZST>".to_string(), - ConstValue::Scalar(s) => format!("Scalar({s:?})"), - ConstValue::Slice { .. } => "Slice(..)".to_string(), - ConstValue::ByRef { .. } => "ByRef(..)".to_string(), + let fmt_val = |val: ConstValue<'tcx>, ty: Ty<'tcx>| { + let tcx = self.tcx; + rustc_data_structures::make_display(move |fmt| { + pretty_print_const_value_tcx(tcx, val, ty, fmt) + }) }; + // FIXME: call pretty_print_const_valtree? let fmt_valtree = |valtree: &ty::ValTree<'tcx>| match valtree { - ty::ValTree::Leaf(leaf) => format!("ValTree::Leaf({leaf:?})"), - ty::ValTree::Branch(_) => "ValTree::Branch(..)".to_string(), + ty::ValTree::Leaf(leaf) => format!("Leaf({leaf:?})"), + ty::ValTree::Branch(_) => "Branch(..)".to_string(), }; - let val = match literal { - ConstantKind::Ty(ct) => match ct.kind() { - ty::ConstKind::Param(p) => format!("Param({p})"), + let val = match const_ { + Const::Ty(ct) => match ct.kind() { + ty::ConstKind::Param(p) => format!("ty::Param({p})"), ty::ConstKind::Unevaluated(uv) => { - format!("Unevaluated({}, {:?})", self.tcx.def_path_str(uv.def), uv.args,) + format!("ty::Unevaluated({}, {:?})", self.tcx.def_path_str(uv.def), uv.args,) } - ty::ConstKind::Value(val) => format!("Value({})", fmt_valtree(&val)), + ty::ConstKind::Value(val) => format!("ty::Valtree({})", fmt_valtree(&val)), + // No `ty::` prefix since we also use this to represent errors from `mir::Unevaluated`. ty::ConstKind::Error(_) => "Error".to_string(), // These variants shouldn't exist in the MIR. ty::ConstKind::Placeholder(_) | ty::ConstKind::Infer(_) | ty::ConstKind::Expr(_) - | ty::ConstKind::Bound(..) => bug!("unexpected MIR constant: {:?}", literal), + | ty::ConstKind::Bound(..) => bug!("unexpected MIR constant: {:?}", const_), }, - ConstantKind::Unevaluated(uv, _) => { + Const::Unevaluated(uv, _) => { format!( "Unevaluated({}, {:?}, {:?})", self.tcx.def_path_str(uv.def), @@ -490,16 +1263,13 @@ impl<'tcx> Visitor<'tcx> for ExtraComments<'tcx> { uv.promoted, ) } - // To keep the diffs small, we render this like we render `ty::Const::Value`. - // - // This changes once `ty::Const::Value` is represented using valtrees. - ConstantKind::Val(val, _) => format!("Value({})", fmt_val(&val)), + Const::Val(val, ty) => format!("Value({})", fmt_val(*val, *ty)), }; // This reflects what `Const` looked liked before `val` was renamed // as `kind`. We print it like this to avoid having to update // expected output in a lot of tests. - self.push(&format!("+ literal: Const {{ ty: {}, val: {} }}", literal.ty(), val)); + self.push(&format!("+ const_: Const {{ ty: {}, val: {} }}", const_.ty(), val)); } } @@ -536,162 +1306,15 @@ fn comment(tcx: TyCtxt<'_>, SourceInfo { span, scope }: SourceInfo) -> String { format!("scope {} at {}", scope.index(), location,) } -/// Prints local variables in a scope tree. -fn write_scope_tree( - tcx: TyCtxt<'_>, - body: &Body<'_>, - scope_tree: &FxHashMap<SourceScope, Vec<SourceScope>>, - w: &mut dyn Write, - parent: SourceScope, - depth: usize, -) -> io::Result<()> { - let indent = depth * INDENT.len(); - - // Local variable debuginfo. - for var_debug_info in &body.var_debug_info { - if var_debug_info.source_info.scope != parent { - // Not declared in this scope. - continue; - } - - let indented_debug_info = format!( - "{0:1$}debug {2} => {3:?};", - INDENT, indent, var_debug_info.name, var_debug_info.value, - ); - - if tcx.sess.opts.unstable_opts.mir_include_spans { - writeln!( - w, - "{0:1$} // in {2}", - indented_debug_info, - ALIGN, - comment(tcx, var_debug_info.source_info), - )?; - } else { - writeln!(w, "{indented_debug_info}")?; - } - } - - // Local variable types. - for (local, local_decl) in body.local_decls.iter_enumerated() { - if (1..body.arg_count + 1).contains(&local.index()) { - // Skip over argument locals, they're printed in the signature. - continue; - } - - if local_decl.source_info.scope != parent { - // Not declared in this scope. - continue; - } - - let mut_str = local_decl.mutability.prefix_str(); - - let mut indented_decl = - format!("{0:1$}let {2}{3:?}: {4:?}", INDENT, indent, mut_str, local, local_decl.ty); - if let Some(user_ty) = &local_decl.user_ty { - for user_ty in user_ty.projections() { - write!(indented_decl, " as {user_ty:?}").unwrap(); - } - } - indented_decl.push(';'); - - let local_name = if local == RETURN_PLACE { " return place" } else { "" }; - - if tcx.sess.opts.unstable_opts.mir_include_spans { - writeln!( - w, - "{0:1$} //{2} in {3}", - indented_decl, - ALIGN, - local_name, - comment(tcx, local_decl.source_info), - )?; - } else { - writeln!(w, "{indented_decl}",)?; - } - } - - let Some(children) = scope_tree.get(&parent) else { - return Ok(()); - }; - - for &child in children { - let child_data = &body.source_scopes[child]; - assert_eq!(child_data.parent_scope, Some(parent)); - - let (special, span) = if let Some((callee, callsite_span)) = child_data.inlined { - ( - format!( - " (inlined {}{})", - if callee.def.requires_caller_location(tcx) { "#[track_caller] " } else { "" }, - callee - ), - Some(callsite_span), - ) - } else { - (String::new(), None) - }; - - let indented_header = format!("{0:1$}scope {2}{3} {{", "", indent, child.index(), special); - - if tcx.sess.opts.unstable_opts.mir_include_spans { - if let Some(span) = span { - writeln!( - w, - "{0:1$} // at {2}", - indented_header, - ALIGN, - tcx.sess.source_map().span_to_embeddable_string(span), - )?; - } else { - writeln!(w, "{indented_header}")?; - } - } else { - writeln!(w, "{indented_header}")?; - } - - write_scope_tree(tcx, body, scope_tree, w, child, depth + 1)?; - writeln!(w, "{0:1$}}}", "", depth * INDENT.len())?; - } - - Ok(()) -} - -/// Write out a human-readable textual representation of the MIR's `fn` type and the types of its -/// local variables (both user-defined bindings and compiler temporaries). -pub fn write_mir_intro<'tcx>( - tcx: TyCtxt<'tcx>, - body: &Body<'_>, - w: &mut dyn Write, -) -> io::Result<()> { - write_mir_sig(tcx, body, w)?; - writeln!(w, "{{")?; - - // construct a scope tree and write it out - let mut scope_tree: FxHashMap<SourceScope, Vec<SourceScope>> = Default::default(); - for (index, scope_data) in body.source_scopes.iter().enumerate() { - if let Some(parent) = scope_data.parent_scope { - scope_tree.entry(parent).or_default().push(SourceScope::new(index)); - } else { - // Only the argument scope has no parent, because it's the root. - assert_eq!(index, OUTERMOST_SOURCE_SCOPE.index()); - } - } - - write_scope_tree(tcx, body, &scope_tree, w, OUTERMOST_SOURCE_SCOPE, 1)?; - - // Add an empty line before the first block is printed. - writeln!(w)?; - - Ok(()) -} +/////////////////////////////////////////////////////////////////////////// +// Allocations /// Find all `AllocId`s mentioned (recursively) in the MIR body and print their corresponding /// allocations. pub fn write_allocations<'tcx>( tcx: TyCtxt<'tcx>, body: &Body<'_>, - w: &mut dyn Write, + w: &mut dyn io::Write, ) -> io::Result<()> { fn alloc_ids_from_alloc( alloc: ConstAllocation<'_>, @@ -702,24 +1325,28 @@ pub fn write_allocations<'tcx>( fn alloc_ids_from_const_val(val: ConstValue<'_>) -> impl Iterator<Item = AllocId> + '_ { match val { ConstValue::Scalar(interpret::Scalar::Ptr(ptr, _)) => { - Either::Left(Either::Left(std::iter::once(ptr.provenance))) + Either::Left(std::iter::once(ptr.provenance)) } - ConstValue::Scalar(interpret::Scalar::Int { .. }) => { - Either::Left(Either::Right(std::iter::empty())) + ConstValue::Scalar(interpret::Scalar::Int { .. }) => Either::Right(std::iter::empty()), + ConstValue::ZeroSized => Either::Right(std::iter::empty()), + ConstValue::Slice { .. } => { + // `u8`/`str` slices, shouldn't contain pointers that we want to print. + Either::Right(std::iter::empty()) } - ConstValue::ZeroSized => Either::Left(Either::Right(std::iter::empty())), - ConstValue::ByRef { alloc, .. } | ConstValue::Slice { data: alloc, .. } => { - Either::Right(alloc_ids_from_alloc(alloc)) + ConstValue::Indirect { alloc_id, .. } => { + // FIXME: we don't actually want to print all of these, since some are printed nicely directly as values inline in MIR. + // Really we'd want `pretty_print_const_value` to decide which allocations to print, instead of having a separate visitor. + Either::Left(std::iter::once(alloc_id)) } } } struct CollectAllocIds(BTreeSet<AllocId>); impl<'tcx> Visitor<'tcx> for CollectAllocIds { - fn visit_constant(&mut self, c: &Constant<'tcx>, _: Location) { - match c.literal { - ConstantKind::Ty(_) | ConstantKind::Unevaluated(..) => {} - ConstantKind::Val(val, _) => { + fn visit_constant(&mut self, c: &ConstOperand<'tcx>, _: Location) { + match c.const_ { + Const::Ty(_) | Const::Unevaluated(..) => {} + Const::Val(val, _) => { self.0.extend(alloc_ids_from_const_val(val)); } } @@ -736,7 +1363,7 @@ pub fn write_allocations<'tcx>( let mut todo: Vec<_> = seen.iter().copied().collect(); while let Some(id) = todo.pop() { let mut write_allocation_track_relocs = - |w: &mut dyn Write, alloc: ConstAllocation<'tcx>| -> io::Result<()> { + |w: &mut dyn io::Write, alloc: ConstAllocation<'tcx>| -> io::Result<()> { // `.rev()` because we are popping them from the back of the `todo` vector. for id in alloc_ids_from_alloc(alloc).rev() { if seen.insert(id) { @@ -997,91 +1624,173 @@ pub fn write_allocation_bytes<'tcx, Prov: Provenance, Extra, Bytes: AllocBytes>( Ok(()) } -fn write_mir_sig(tcx: TyCtxt<'_>, body: &Body<'_>, w: &mut dyn Write) -> io::Result<()> { - use rustc_hir::def::DefKind; - - trace!("write_mir_sig: {:?}", body.source.instance); - let def_id = body.source.def_id(); - let kind = tcx.def_kind(def_id); - let is_function = match kind { - DefKind::Fn | DefKind::AssocFn | DefKind::Ctor(..) => true, - _ => tcx.is_closure(def_id), - }; - match (kind, body.source.promoted) { - (_, Some(i)) => write!(w, "{i:?} in ")?, - (DefKind::Const | DefKind::AssocConst, _) => write!(w, "const ")?, - (DefKind::Static(hir::Mutability::Not), _) => write!(w, "static ")?, - (DefKind::Static(hir::Mutability::Mut), _) => write!(w, "static mut ")?, - (_, _) if is_function => write!(w, "fn ")?, - (DefKind::AnonConst | DefKind::InlineConst, _) => {} // things like anon const, not an item - _ => bug!("Unexpected def kind {:?}", kind), - } - - ty::print::with_forced_impl_filename_line! { - // see notes on #41697 elsewhere - write!(w, "{}", tcx.def_path_str(def_id))? - } +/////////////////////////////////////////////////////////////////////////// +// Constants - if body.source.promoted.is_none() && is_function { - write!(w, "(")?; +fn pretty_print_byte_str(fmt: &mut Formatter<'_>, byte_str: &[u8]) -> fmt::Result { + write!(fmt, "b\"{}\"", byte_str.escape_ascii()) +} - // fn argument types. - for (i, arg) in body.args_iter().enumerate() { - if i != 0 { - write!(w, ", ")?; - } - write!(w, "{:?}: {}", Place::from(arg), body.local_decls[arg].ty)?; +fn comma_sep<'tcx>( + tcx: TyCtxt<'tcx>, + fmt: &mut Formatter<'_>, + elems: Vec<(ConstValue<'tcx>, Ty<'tcx>)>, +) -> fmt::Result { + let mut first = true; + for (ct, ty) in elems { + if !first { + fmt.write_str(", ")?; } - - write!(w, ") -> {}", body.return_ty())?; - } else { - assert_eq!(body.arg_count, 0); - write!(w, ": {} =", body.return_ty())?; + pretty_print_const_value_tcx(tcx, ct, ty, fmt)?; + first = false; } - - if let Some(yield_ty) = body.yield_ty() { - writeln!(w)?; - writeln!(w, "yields {yield_ty}")?; - } - - write!(w, " ")?; - // Next thing that gets printed is the opening { - Ok(()) } -fn write_user_type_annotations( - tcx: TyCtxt<'_>, - body: &Body<'_>, - w: &mut dyn Write, -) -> io::Result<()> { - if !body.user_type_annotations.is_empty() { - writeln!(w, "| User Type Annotations")?; - } - for (index, annotation) in body.user_type_annotations.iter_enumerated() { - writeln!( - w, - "| {:?}: user_ty: {:?}, span: {}, inferred_ty: {:?}", - index.index(), - annotation.user_ty, - tcx.sess.source_map().span_to_embeddable_string(annotation.span), - annotation.inferred_ty, - )?; +fn pretty_print_const_value_tcx<'tcx>( + tcx: TyCtxt<'tcx>, + ct: ConstValue<'tcx>, + ty: Ty<'tcx>, + fmt: &mut Formatter<'_>, +) -> fmt::Result { + use crate::ty::print::PrettyPrinter; + + if tcx.sess.verbose() { + fmt.write_str(&format!("ConstValue({ct:?}: {ty})"))?; + return Ok(()); } - if !body.user_type_annotations.is_empty() { - writeln!(w, "|")?; + + let u8_type = tcx.types.u8; + match (ct, ty.kind()) { + // Byte/string slices, printed as (byte) string literals. + (_, ty::Ref(_, inner_ty, _)) if matches!(inner_ty.kind(), ty::Str) => { + if let Some(data) = ct.try_get_slice_bytes_for_diagnostics(tcx) { + fmt.write_str(&format!("{:?}", String::from_utf8_lossy(data)))?; + return Ok(()); + } + } + (_, ty::Ref(_, inner_ty, _)) if matches!(inner_ty.kind(), ty::Slice(t) if *t == u8_type) => { + if let Some(data) = ct.try_get_slice_bytes_for_diagnostics(tcx) { + pretty_print_byte_str(fmt, data)?; + return Ok(()); + } + } + (ConstValue::Indirect { alloc_id, offset }, ty::Array(t, n)) if *t == u8_type => { + let n = n.try_to_target_usize(tcx).unwrap(); + let alloc = tcx.global_alloc(alloc_id).unwrap_memory(); + // cast is ok because we already checked for pointer size (32 or 64 bit) above + let range = AllocRange { start: offset, size: Size::from_bytes(n) }; + let byte_str = alloc.inner().get_bytes_strip_provenance(&tcx, range).unwrap(); + fmt.write_str("*")?; + pretty_print_byte_str(fmt, byte_str)?; + return Ok(()); + } + // Aggregates, printed as array/tuple/struct/variant construction syntax. + // + // NB: the `has_non_region_param` check ensures that we can use + // the `destructure_const` query with an empty `ty::ParamEnv` without + // introducing ICEs (e.g. via `layout_of`) from missing bounds. + // E.g. `transmute([0usize; 2]): (u8, *mut T)` needs to know `T: Sized` + // to be able to destructure the tuple into `(0u8, *mut T)` + (_, ty::Array(..) | ty::Tuple(..) | ty::Adt(..)) if !ty.has_non_region_param() => { + let ct = tcx.lift(ct).unwrap(); + let ty = tcx.lift(ty).unwrap(); + if let Some(contents) = tcx.try_destructure_mir_constant_for_diagnostics(ct, ty) { + let fields: Vec<(ConstValue<'_>, Ty<'_>)> = contents.fields.to_vec(); + match *ty.kind() { + ty::Array(..) => { + fmt.write_str("[")?; + comma_sep(tcx, fmt, fields)?; + fmt.write_str("]")?; + } + ty::Tuple(..) => { + fmt.write_str("(")?; + comma_sep(tcx, fmt, fields)?; + if contents.fields.len() == 1 { + fmt.write_str(",")?; + } + fmt.write_str(")")?; + } + ty::Adt(def, _) if def.variants().is_empty() => { + fmt.write_str(&format!("{{unreachable(): {ty}}}"))?; + } + ty::Adt(def, args) => { + let variant_idx = contents + .variant + .expect("destructed mir constant of adt without variant idx"); + let variant_def = &def.variant(variant_idx); + let args = tcx.lift(args).unwrap(); + let mut cx = FmtPrinter::new(tcx, Namespace::ValueNS); + cx.print_alloc_ids = true; + let cx = cx.print_value_path(variant_def.def_id, args)?; + fmt.write_str(&cx.into_buffer())?; + + match variant_def.ctor_kind() { + Some(CtorKind::Const) => {} + Some(CtorKind::Fn) => { + fmt.write_str("(")?; + comma_sep(tcx, fmt, fields)?; + fmt.write_str(")")?; + } + None => { + fmt.write_str(" {{ ")?; + let mut first = true; + for (field_def, (ct, ty)) in iter::zip(&variant_def.fields, fields) + { + if !first { + fmt.write_str(", ")?; + } + write!(fmt, "{}: ", field_def.name)?; + pretty_print_const_value_tcx(tcx, ct, ty, fmt)?; + first = false; + } + fmt.write_str(" }}")?; + } + } + } + _ => unreachable!(), + } + return Ok(()); + } + } + (ConstValue::Scalar(scalar), _) => { + let mut cx = FmtPrinter::new(tcx, Namespace::ValueNS); + cx.print_alloc_ids = true; + let ty = tcx.lift(ty).unwrap(); + cx = cx.pretty_print_const_scalar(scalar, ty)?; + fmt.write_str(&cx.into_buffer())?; + return Ok(()); + } + (ConstValue::ZeroSized, ty::FnDef(d, s)) => { + let mut cx = FmtPrinter::new(tcx, Namespace::ValueNS); + cx.print_alloc_ids = true; + let cx = cx.print_value_path(*d, s)?; + fmt.write_str(&cx.into_buffer())?; + return Ok(()); + } + // FIXME(oli-obk): also pretty print arrays and other aggregate constants by reading + // their fields instead of just dumping the memory. + _ => {} } - Ok(()) + // Fall back to debug pretty printing for invalid constants. + write!(fmt, "{ct:?}: {ty}") } -pub fn dump_mir_def_ids(tcx: TyCtxt<'_>, single: Option<DefId>) -> Vec<DefId> { - if let Some(i) = single { - vec![i] - } else { - tcx.mir_keys(()).iter().map(|def_id| def_id.to_def_id()).collect() - } +pub(crate) fn pretty_print_const_value<'tcx>( + ct: ConstValue<'tcx>, + ty: Ty<'tcx>, + fmt: &mut Formatter<'_>, +) -> fmt::Result { + ty::tls::with(|tcx| { + let ct = tcx.lift(ct).unwrap(); + let ty = tcx.lift(ty).unwrap(); + pretty_print_const_value_tcx(tcx, ct, ty, fmt) + }) } +/////////////////////////////////////////////////////////////////////////// +// Miscellaneous + /// Calc converted u64 decimal into hex and return it's length in chars /// /// ```ignore (cannot-test-private-function) |