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[DropUnnecessaryAssumes] Don't drop public_type_test intrinsic #166034

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Merged
merged 1 commit into from
Nov 3, 2025
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Merged

[DropUnnecessaryAssumes] Don't drop public_type_test intrinsic #166034

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3 changes: 2 additions & 1 deletion llvm/lib/Transforms/Scalar/DropUnnecessaryAssumes.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -122,7 +122,8 @@ DropUnnecessaryAssumesPass::run(Function &F, FunctionAnalysisManager &FAM) {

Value *Cond = Assume->getArgOperand(0);
// Don't drop type tests, which have special semantics.
if (match(Cond, m_Intrinsic<Intrinsic::type_test>()))
if (match(Cond, m_Intrinsic<Intrinsic::type_test>()) ||
match(Cond, m_Intrinsic<Intrinsic::public_type_test>()))
continue;

SmallVector<Value *> Affected;
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12 changes: 12 additions & 0 deletions llvm/test/Transforms/DropUnnecessaryAssumes/basic.ll
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Expand Up @@ -184,6 +184,18 @@ define void @type_test(ptr %x) {
ret void
}

define void @public_type_test(ptr %x) {
; CHECK-LABEL: define void @public_type_test(
; CHECK-SAME: ptr [[X:%.*]]) {
; CHECK-NEXT: [[TEST:%.*]] = call i1 @llvm.public.type.test(ptr [[X]], metadata !"typeid")
; CHECK-NEXT: call void @llvm.assume(i1 [[TEST]])
; CHECK-NEXT: ret void
;
%test = call i1 @llvm.public.type.test(ptr %x, metadata !"typeid")
call void @llvm.assume(i1 %test)
ret void
}

define void @multiple_dead_conds(i32 %x) {
; CHECK-LABEL: define void @multiple_dead_conds(
; CHECK-SAME: i32 [[X:%.*]]) {
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