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Stuart Cook 544462ad8b
Rollup merge of #152474 - sgasho:opt-bisect-limit-mir, r=saethlin 
Implement opt-bisect-limit for MIR

closes: rust-lang/rust#150910

Enable bisecting MIR optimization passes to enhance debuggability.

discussions on zulip: https://rust-lang.zulipchat.com/#narrow/channel/182449-t-compiler.2Fhelp/topic/MIR.20dump.20the.20pass.20names/with/573219207

### Check it works
#### Sample code
```rust
fn abs(num: isize) -> usize {
    if num < 0 { -num as usize } else { num as usize }
}

fn main() {
    println!("{}", abs(-10));
}
```

#### Output

```shell
rustc +mir -Zmir-opt-bisect-limit=30 src/main.rs
BISECT: running pass (1) CheckAlignment on main[89d5]::main
BISECT: running pass (2) CheckNull on main[89d5]::main
BISECT: running pass (3) CheckEnums on main[89d5]::main
BISECT: running pass (4) LowerSliceLenCalls on main[89d5]::main
BISECT: running pass (5) InstSimplify-before-inline on main[89d5]::main
BISECT: running pass (6) ForceInline on main[89d5]::main
BISECT: running pass (7) RemoveStorageMarkers on main[89d5]::main
BISECT: running pass (8) RemoveZsts on main[89d5]::main
BISECT: running pass (9) RemoveUnneededDrops on main[89d5]::main
BISECT: running pass (10) UnreachableEnumBranching on main[89d5]::main
BISECT: running pass (11) SimplifyCfg-after-unreachable-enum-branching on main[89d5]::main
BISECT: running pass (12) InstSimplify-after-simplifycfg on main[89d5]::main
BISECT: running pass (13) SimplifyConstCondition-after-inst-simplify on main[89d5]::main
BISECT: running pass (14) SimplifyLocals-before-const-prop on main[89d5]::main
BISECT: running pass (15) SimplifyLocals-after-value-numbering on main[89d5]::main
BISECT: running pass (16) MatchBranchSimplification on main[89d5]::main
BISECT: running pass (17) SingleUseConsts on main[89d5]::main
BISECT: running pass (18) SimplifyConstCondition-after-const-prop on main[89d5]::main
BISECT: running pass (19) SimplifyConstCondition-final on main[89d5]::main
BISECT: running pass (20) RemoveNoopLandingPads on main[89d5]::main
BISECT: running pass (21) SimplifyCfg-final on main[89d5]::main
BISECT: running pass (22) CopyProp on main[89d5]::main
BISECT: running pass (23) SimplifyLocals-final on main[89d5]::main
BISECT: running pass (24) AddCallGuards on main[89d5]::main
BISECT: running pass (25) PreCodegen on main[89d5]::main
BISECT: running pass (26) CheckAlignment on main[89d5]::abs
BISECT: running pass (27) CheckNull on main[89d5]::abs
BISECT: running pass (28) CheckEnums on main[89d5]::abs
BISECT: running pass (29) LowerSliceLenCalls on main[89d5]::abs
BISECT: running pass (30) InstSimplify-before-inline on main[89d5]::abs
BISECT: NOT running pass (31) ForceInline on main[89d5]::abs
BISECT: NOT running pass (32) RemoveStorageMarkers on main[89d5]::abs
BISECT: NOT running pass (33) RemoveZsts on main[89d5]::abs
BISECT: NOT running pass (34) RemoveUnneededDrops on main[89d5]::abs
BISECT: NOT running pass (35) UnreachableEnumBranching on main[89d5]::abs
BISECT: NOT running pass (36) SimplifyCfg-after-unreachable-enum-branching on main[89d5]::abs
BISECT: NOT running pass (37) InstSimplify-after-simplifycfg on main[89d5]::abs
BISECT: NOT running pass (38) SimplifyConstCondition-after-inst-simplify on main[89d5]::abs
BISECT: NOT running pass (39) SimplifyLocals-before-const-prop on main[89d5]::abs
BISECT: NOT running pass (40) SimplifyLocals-after-value-numbering on main[89d5]::abs
BISECT: NOT running pass (41) MatchBranchSimplification on main[89d5]::abs
BISECT: NOT running pass (42) SingleUseConsts on main[89d5]::abs
BISECT: NOT running pass (43) SimplifyConstCondition-after-const-prop on main[89d5]::abs
BISECT: NOT running pass (44) SimplifyConstCondition-final on main[89d5]::abs
BISECT: NOT running pass (45) RemoveNoopLandingPads on main[89d5]::abs
BISECT: NOT running pass (46) SimplifyCfg-final on main[89d5]::abs
BISECT: NOT running pass (47) CopyProp on main[89d5]::abs
BISECT: NOT running pass (48) SimplifyLocals-final on main[89d5]::abs
BISECT: NOT running pass (49) AddCallGuards on main[89d5]::abs
BISECT: NOT running pass (50) PreCodegen on main[89d5]::abs
```

r? @saethlin
2026-02-18 17:29:46 +11:00
..
assembly-llvm Rollup merge of #152404 - durin42:llvm-23-instcombine-shrink-constant, r=Mark-Simulacrum 2026-02-14 22:11:54 +01:00
auxiliary UnsafePinned: implement opsem effects of UnsafeUnpin 2026-02-12 09:09:35 +01:00
build-std/configurations Test that -Zbuild-std=core works on a variety of profiles 2026-01-14 20:39:12 -05:00
codegen-llvm Auto merge of #152605 - scottmcm:box-drop-alignment, r=Mark-Simulacrum 2026-02-15 13:38:45 +00:00
codegen-units add write_box_via_move intrinsic and use it for vec! 2026-02-16 17:27:40 +01:00
coverage coverage: Add a test case for a previously-unknown span mismatch 2026-02-03 22:53:38 +11:00
coverage-run-rustdoc
crashes Revert "Fix an ICE in the vtable iteration for a trait reference" 2026-02-16 17:52:06 -08:00
debuginfo Allow provisional mgca syntax of type const <IDENT> = <EXPR> to be reconized. 2026-02-09 07:59:24 -08:00
incremental Bless tests 2026-02-11 18:08:18 +09:00
mir-opt Rollup merge of #152729 - Enselic:single_use_consts-not-required, r=cjgillot 2026-02-18 17:29:43 +11:00
pretty Fix pretty print tests with #[prelude_import] 2026-02-12 17:43:58 +00:00
run-make Rollup merge of #152474 - sgasho:opt-bisect-limit-mir, r=saethlin 2026-02-18 17:29:46 +11:00
run-make-cargo Update cargo submodule 2026-01-30 19:15:24 -05:00
rustdoc-gui Remove the 4 failing tests from rustdoc-gui 2026-02-06 01:13:41 +01:00
rustdoc-html Rollup merge of #151783 - mu001999-contrib:impl/final-method, r=fee1-dead 2026-02-17 13:02:21 +11:00
rustdoc-js rustdoc: sort stable items first 2026-02-13 14:44:41 -06:00
rustdoc-js-std rustdoc: sort stable items first 2026-02-13 14:44:41 -06:00
rustdoc-json resolve: Mark items under ambigous imports as exported 2026-01-27 16:24:53 +03:00
rustdoc-ui Unify wording of resolve error 2026-02-17 16:51:44 +00:00
ui Rollup merge of #151530 - reddevilmidzy:e0106, r=fee1-dead 2026-02-18 17:29:45 +11:00
ui-fulldeps Unify wording of resolve error 2026-02-17 16:51:44 +00:00
COMPILER_TESTS.md