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[LLVM] Fix a bug in Intrinsic::getFnAttributes #161248

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Merged
merged 1 commit into from
Sep 30, 2025
Merged

[LLVM] Fix a bug in Intrinsic::getFnAttributes #161248

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8 changes: 8 additions & 0 deletions llvm/unittests/IR/IntrinsicsTest.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -189,4 +189,12 @@ TEST_F(IntrinsicsTest, InstrProfInheritance) {
}
}

// Check that getFnAttributes for intrinsics that do not have any function
// attributes correcty returns an empty set.
TEST(IntrinsicAttributes, TestGetFnAttributesBug) {
using namespace Intrinsic;
LLVMContext Context;
AttributeSet AS = getFnAttributes(Context, experimental_guard);
EXPECT_FALSE(AS.hasAttributes());
}
} // end namespace
5 changes: 4 additions & 1 deletion llvm/utils/TableGen/Basic/IntrinsicEmitter.cpp
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Expand Up @@ -794,12 +794,15 @@ AttributeSet Intrinsic::getFnAttributes(LLVMContext &C, ID id) {{
if (id == 0)
return AttributeSet();
auto [FnAttrID, _] = unpackID(IntrinsicsToAttributesMap[id - 1]);
if (FnAttrID == {})
return AttributeSet();
return getIntrinsicFnAttributeSet(C, FnAttrID);
}
#endif // GET_INTRINSIC_ATTRIBUTES

)",
UniqAttributesBitSize, MaxNumAttrs, NoFunctionAttrsID);
UniqAttributesBitSize, MaxNumAttrs, NoFunctionAttrsID,
NoFunctionAttrsID);
}

void IntrinsicEmitter::EmitIntrinsicToBuiltinMap(
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