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Mir pretty print: Add cleanup comment

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I found it useful to add a comment indicating whether or not a
BasicBlock is a cleanup block or not. Hopefully you'll find it
useful too.
This commit is contained in:
David Henningsson 2017-09-29 11:00:08 +02:00
parent 17600c1ea7
commit 6f8b69fcd1
1 changed files with 3 additions and 1 deletions
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4
src/librustc_mir/util/pretty.rs
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@ -188,7 +188,9 @@ pub fn write_basic_block(tcx: TyCtxt,
let data = &mir[block];
// Basic block label at the top.
writeln!(w, "{}{:?}: {{", INDENT, block)?;
let cleanup_text = if data.is_cleanup { " // cleanup" } else { "" };
let lbl = format!("{}{:?}: {{", INDENT, block);
writeln!(w, "{0:1$}{2}", lbl, ALIGN, cleanup_text)?;
// List of statements in the middle.
let mut current_location = Location { block: block, statement_index: 0 };