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Dec 8, 2018
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Improve the usage message for -Z dump-mir. #56597

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8 changes: 7 additions & 1 deletion src/librustc/session/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1272,7 +1272,13 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
arg_align_attributes: bool = (false, parse_bool, [TRACKED],
"emit align metadata for reference arguments"),
dump_mir: Option<String> = (None, parse_opt_string, [UNTRACKED],
"dump MIR state at various points in transforms"),
"dump MIR state to file.
`val` is used to select which passes and functions to dump. For example:
`all` matches all passes and functions,
`foo` matches all passes for functions whose name contains 'foo',
`foo & ConstProp` only the 'ConstProp' pass for function names containing 'foo',
`foo | bar` all passes for function names containing 'foo' or 'bar'."),

dump_mir_dir: String = (String::from("mir_dump"), parse_string, [UNTRACKED],
"the directory the MIR is dumped into"),
dump_mir_graphviz: bool = (false, parse_bool, [UNTRACKED],
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