40ae34194c
detects redundant imports that can be eliminated. for #117772 : In order to facilitate review and modification, split the checking code and removing redundant imports code into two PR.
98 lines
2.7 KiB
Rust
98 lines
2.7 KiB
Rust
//! Annotate the clif ir with comments describing how arguments are passed into the current function
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//! and where all locals are stored.
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use std::borrow::Cow;
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use rustc_target::abi::call::PassMode;
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use crate::prelude::*;
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pub(super) fn add_args_header_comment(fx: &mut FunctionCx<'_, '_, '_>) {
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if fx.clif_comments.enabled() {
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fx.add_global_comment(
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"kind loc.idx param pass mode ty".to_string(),
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);
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}
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}
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pub(super) fn add_arg_comment<'tcx>(
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fx: &mut FunctionCx<'_, '_, 'tcx>,
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kind: &str,
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local: Option<mir::Local>,
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local_field: Option<usize>,
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params: &[Value],
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arg_abi_mode: &PassMode,
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arg_layout: TyAndLayout<'tcx>,
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) {
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if !fx.clif_comments.enabled() {
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return;
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}
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let local = if let Some(local) = local {
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Cow::Owned(format!("{:?}", local))
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} else {
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Cow::Borrowed("???")
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};
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let local_field = if let Some(local_field) = local_field {
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Cow::Owned(format!(".{}", local_field))
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} else {
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Cow::Borrowed("")
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};
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let params = match params {
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[] => Cow::Borrowed("-"),
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[param] => Cow::Owned(format!("= {:?}", param)),
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[param_a, param_b] => Cow::Owned(format!("= {:?},{:?}", param_a, param_b)),
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params => Cow::Owned(format!(
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"= {}",
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params.iter().map(ToString::to_string).collect::<Vec<_>>().join(",")
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)),
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};
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let pass_mode = format!("{:?}", arg_abi_mode);
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fx.add_global_comment(format!(
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"{kind:5}{local:>3}{local_field:<5} {params:10} {pass_mode:36} {ty:?}",
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kind = kind,
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local = local,
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local_field = local_field,
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params = params,
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pass_mode = pass_mode,
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ty = arg_layout.ty,
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));
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}
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pub(super) fn add_locals_header_comment(fx: &mut FunctionCx<'_, '_, '_>) {
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if fx.clif_comments.enabled() {
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fx.add_global_comment(String::new());
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fx.add_global_comment(
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"kind local ty size align (abi,pref)".to_string(),
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);
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}
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}
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pub(super) fn add_local_place_comments<'tcx>(
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fx: &mut FunctionCx<'_, '_, 'tcx>,
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place: CPlace<'tcx>,
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local: Local,
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) {
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if !fx.clif_comments.enabled() {
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return;
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}
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let TyAndLayout { ty, layout } = place.layout();
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let rustc_target::abi::LayoutS { size, align, .. } = layout.0.0;
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let (kind, extra) = place.debug_comment();
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fx.add_global_comment(format!(
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"{:<5} {:5} {:30} {:4}b {}, {}{}{}",
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kind,
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format!("{:?}", local),
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format!("{:?}", ty),
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size.bytes(),
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align.abi.bytes(),
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align.pref.bytes(),
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if extra.is_empty() { "" } else { " " },
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extra,
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));
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}
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