1 //! Annotate the clif ir with comments describing how arguments are passed into the current function
2 //! and where all locals are stored.
7 use rustc_target::abi::call::PassMode;
9 use cranelift_codegen::entity::EntityRef;
11 use crate::prelude::*;
13 pub(super) fn add_args_header_comment(fx: &mut FunctionCx<'_, '_, '_>) {
14 fx.add_global_comment(
15 "kind loc.idx param pass mode ty".to_string(),
19 pub(super) fn add_arg_comment<'tcx>(
20 fx: &mut FunctionCx<'_, '_, 'tcx>,
22 local: Option<mir::Local>,
23 local_field: Option<usize>,
25 arg_abi_mode: PassMode,
26 arg_layout: TyAndLayout<'tcx>,
28 let local = if let Some(local) = local {
29 Cow::Owned(format!("{:?}", local))
33 let local_field = if let Some(local_field) = local_field {
34 Cow::Owned(format!(".{}", local_field))
39 let params = match params {
40 [] => Cow::Borrowed("-"),
41 [param] => Cow::Owned(format!("= {:?}", param)),
42 [param_a, param_b] => Cow::Owned(format!("= {:?},{:?}", param_a, param_b)),
43 params => Cow::Owned(format!(
45 params.iter().map(ToString::to_string).collect::<Vec<_>>().join(",")
49 let pass_mode = format!("{:?}", arg_abi_mode);
50 fx.add_global_comment(format!(
51 "{kind:5}{local:>3}{local_field:<5} {params:10} {pass_mode:36} {ty:?}",
54 local_field = local_field,
56 pass_mode = pass_mode,
61 pub(super) fn add_locals_header_comment(fx: &mut FunctionCx<'_, '_, '_>) {
62 fx.add_global_comment(String::new());
63 fx.add_global_comment(
64 "kind local ty size align (abi,pref)".to_string(),
68 pub(super) fn add_local_place_comments<'tcx>(
69 fx: &mut FunctionCx<'_, '_, 'tcx>,
73 let TyAndLayout { ty, layout } = place.layout();
74 let rustc_target::abi::Layout { size, align, abi: _, variants: _, fields: _, largest_niche: _ } =
77 let (kind, extra) = match *place.inner() {
78 CPlaceInner::Var(place_local, var) => {
79 assert_eq!(local, place_local);
80 ("ssa", Cow::Owned(format!(",var={}", var.index())))
82 CPlaceInner::VarPair(place_local, var1, var2) => {
83 assert_eq!(local, place_local);
84 ("ssa", Cow::Owned(format!(",var=({}, {})", var1.index(), var2.index())))
86 CPlaceInner::VarLane(_local, _var, _lane) => unreachable!(),
87 CPlaceInner::Addr(ptr, meta) => {
88 let meta = if let Some(meta) = meta {
89 Cow::Owned(format!(",meta={}", meta))
93 match ptr.base_and_offset() {
94 (crate::pointer::PointerBase::Addr(addr), offset) => {
95 ("reuse", format!("storage={}{}{}", addr, offset, meta).into())
97 (crate::pointer::PointerBase::Stack(stack_slot), offset) => {
98 ("stack", format!("storage={}{}{}", stack_slot, offset, meta).into())
100 (crate::pointer::PointerBase::Dangling(align), offset) => {
101 ("zst", format!("align={},offset={}", align.bytes(), offset).into())
107 fx.add_global_comment(format!(
108 "{:<5} {:5} {:30} {:4}b {}, {}{}{}",
110 format!("{:?}", local),
115 if extra.is_empty() { "" } else { " " },