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Avoid MIR bloat in inlining

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In 126578 we ended up with more binary size increases than expected.

This change attempts to avoid inlining large things into small things, to avoid that kind of increase, in cases when top-down inlining will still be able to do that inlining later.
This commit is contained in:
Scott McMurray 2024-06-29 00:48:23 -07:00
parent c3774be741
commit 23c8ed14c9
18 changed files with 387 additions and 847 deletions
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2
compiler/rustc_session/src/options.rs
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@ -1766,6 +1766,8 @@ options! {
"enable LLVM inlining (default: yes)"),
inline_mir: Option<bool> = (None, parse_opt_bool, [TRACKED],
"enable MIR inlining (default: no)"),
inline_mir_forwarder_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
"inlining threshold when the caller is a simple forwarding function (default: 30)"),
inline_mir_hint_threshold: Option<usize> = (None, parse_opt_number, [TRACKED],
"inlining threshold for functions with inline hint (default: 100)"),
inline_mir_preserve_debug: Option<bool> = (None, parse_opt_bool, [TRACKED],