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Removes SimplifyComparisonIntegral pass #150940

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Removes SimplifyComparisonIntegral pass #150940

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bf87e33
Add miscompiled test cases
dianqk Jan 10, 2026
ae3a7db
Removes SimplifyComparisonIntegral pass
dianqk Jan 10, 2026
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2 changes: 0 additions & 2 deletions compiler/rustc_mir_transform/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -193,7 +193,6 @@ declare_passes! {
AfterConstProp,
Final
};
mod simplify_comparison_integral : SimplifyComparisonIntegral;
mod single_use_consts : SingleUseConsts;
mod sroa : ScalarReplacementOfAggregates;
mod strip_debuginfo : StripDebugInfo;
Expand Down Expand Up @@ -749,7 +748,6 @@ pub(crate) fn run_optimization_passes<'tcx>(tcx: TyCtxt<'tcx>, body: &mut Body<'
&o1(simplify_branches::SimplifyConstCondition::AfterConstProp),
&jump_threading::JumpThreading,
&early_otherwise_branch::EarlyOtherwiseBranch,
&simplify_comparison_integral::SimplifyComparisonIntegral,
&o1(simplify_branches::SimplifyConstCondition::Final),
&o1(remove_noop_landing_pads::RemoveNoopLandingPads),
&o1(simplify::SimplifyCfg::Final),
Expand Down
256 changes: 0 additions & 256 deletions compiler/rustc_mir_transform/src/simplify_comparison_integral.rs
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This file was deleted.

2 changes: 1 addition & 1 deletion tests/codegen-llvm/hint/likely.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,7 @@ pub fn test4(x: u64) {
}

// CHECK-LABEL: @test4(
// CHECK: br i1 %0, label %bb3, label %bb2, !prof ![[NUM2:[0-9]+]]
// CHECK: br i1 {{.*}}, label %bb3, label %bb2, !prof ![[NUM2:[0-9]+]]
// CHECK: bb3:
// CHECK: path_a
// CHECK: bb2:
Expand Down
2 changes: 1 addition & 1 deletion tests/codegen-llvm/hint/unlikely.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,7 @@ pub fn test4(x: u64) {
}

// CHECK-LABEL: @test4(
// CHECK: br i1 %0, label %bb4, label %bb2, !prof ![[NUM2:[0-9]+]]
// CHECK: br i1 {{.*}}, label %bb4, label %bb2, !prof ![[NUM2:[0-9]+]]
// CHECK: bb4:
// CHECK: path_a
// CHECK: bb2:
Expand Down
44 changes: 24 additions & 20 deletions tests/mir-opt/funky_arms.float_to_exponential_common.GVN.32bit.panic-abort.diff
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Expand Up @@ -29,10 +29,11 @@
debug precision => _8;
let _8: usize;
scope 5 (inlined Formatter::<'_>::precision) {
let mut _22: u32;
let mut _22: bool;
let mut _23: u32;
let mut _24: usize;
let mut _25: u16;
let mut _24: u32;
let mut _25: usize;
let mut _26: u16;
}
}
}
Expand Down Expand Up @@ -71,10 +72,12 @@
StorageLive(_6);
StorageLive(_22);
StorageLive(_23);
_23 = copy (((*_1).0: std::fmt::FormattingOptions).0: u32);
_22 = BitAnd(move _23, const core::fmt::flags::PRECISION_FLAG);
StorageDead(_23);
switchInt(copy _22) -> [0: bb10, otherwise: bb11];
StorageLive(_24);
_24 = copy (((*_1).0: std::fmt::FormattingOptions).0: u32);
_23 = BitAnd(move _24, const core::fmt::flags::PRECISION_FLAG);
StorageDead(_24);
_22 = Eq(move _23, const 0_u32);
switchInt(move _22) -> [0: bb10, otherwise: bb9];
}

bb4: {
Expand Down Expand Up @@ -142,26 +145,27 @@
}

bb9: {
_7 = discriminant(_6);
switchInt(move _7) -> [1: bb4, 0: bb6, otherwise: bb12];
StorageDead(_23);
_6 = const Option::<usize>::None;
goto -> bb11;
}

bb10: {
StorageDead(_22);
_6 = const Option::<usize>::None;
goto -> bb9;
StorageDead(_23);
StorageLive(_25);
StorageLive(_26);
_26 = copy (((*_1).0: std::fmt::FormattingOptions).2: u16);
_25 = move _26 as usize (IntToInt);
StorageDead(_26);
_6 = Option::<usize>::Some(move _25);
StorageDead(_25);
goto -> bb11;
}

bb11: {
StorageDead(_22);
StorageLive(_24);
StorageLive(_25);
_25 = copy (((*_1).0: std::fmt::FormattingOptions).2: u16);
_24 = move _25 as usize (IntToInt);
StorageDead(_25);
_6 = Option::<usize>::Some(move _24);
StorageDead(_24);
goto -> bb9;
_7 = discriminant(_6);
switchInt(move _7) -> [1: bb4, 0: bb6, otherwise: bb12];
}

bb12: {
Expand Down
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