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Rollup merge of #78873 - tmiasko:inline-opts, r=oli-obk

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Add flags customizing behaviour of MIR inlining

* `-Zinline-mir-threshold` to change the default threshold.
* `-Zinline-mir-hint-threshold` to change the threshold used by
  functions with inline hint.

Having those as configurable flags makes it possible to experiment with with
different inlining thresholds and substantially increase test coverage of MIR
inlining when used with increased thresholds (for example, necessary to test
#78844).
This commit is contained in:
Jonas Schievink 2020-11-11 20:59:03 +01:00 • committed by GitHub
commit 919177f7e4
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5 changed files with 86 additions and 4 deletions
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4
compiler/rustc_session/src/options.rs
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@ -929,6 +929,10 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
(default: no)"),
incremental_verify_ich: bool = (false, parse_bool, [UNTRACKED],
"verify incr. comp. hashes of green query instances (default: no)"),
inline_mir_threshold: usize = (50, parse_uint, [TRACKED],
"a default MIR inlining threshold (default: 50)"),
inline_mir_hint_threshold: usize = (100, parse_uint, [TRACKED],
"inlining threshold for functions with inline hint (default: 100)"),
inline_in_all_cgus: Option<bool> = (None, parse_opt_bool, [TRACKED],
"control whether `#[inline]` functions are in all CGUs"),
input_stats: bool = (false, parse_bool, [UNTRACKED],