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Rollup merge of #116595 - RalfJung:mir-enable-passes, r=oli-obk

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-Zmir-enable-passes: document that this may enable unsound passes

also add some comments explaining why MIR opts are marked as unsound
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Matthias Krüger 2023-10-10 14:07:48 +02:00 • committed by GitHub
commit de4980cf44
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4 changed files with 9 additions and 4 deletions
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7
compiler/rustc_session/src/options.rs
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@ -1599,9 +1599,10 @@ options! {
"emit Retagging MIR statements, interpreted e.g., by miri; implies -Zmir-opt-level=0 \
(default: no)"),
mir_enable_passes: Vec<(String, bool)> = (Vec::new(), parse_list_with_polarity, [TRACKED],
"use like `-Zmir-enable-passes=+DestinationPropagation,-InstSimplify`. Forces the specified passes to be \
enabled, overriding all other checks. Passes that are not specified are enabled or \
disabled by other flags as usual."),
"use like `-Zmir-enable-passes=+DestinationPropagation,-InstSimplify`. Forces the \
specified passes to be enabled, overriding all other checks. In particular, this will \
enable unsound (known-buggy and hence usually disabled) passes without further warning! \
Passes that are not specified are enabled or disabled by other flags as usual."),
mir_include_spans: bool = (false, parse_bool, [UNTRACKED],
"use line numbers relative to the function in mir pretty printing"),
mir_keep_place_mention: bool = (false, parse_bool, [TRACKED],