From c62bb3914260c9b864dcf88e8a12ee645f5368da Mon Sep 17 00:00:00 2001 From: John McCall Date: Wed, 15 Feb 2012 01:22:51 +0000 Subject: [PATCH] Split reinterpret_casts of member pointers out from CK_BitCast; this is general goodness because representations of member pointers are not always equivalent across member pointer types on all ABIs (even though this isn't really standard-endorsed). Take advantage of the new information to teach IR-generation how to do these reinterprets in constant initializers. Make sure this works when intermingled with hierarchy conversions (although this is not part of our motivating use case). Doing this in the constant-evaluator would probably have been better, but that would require a *lot* of extra structure in the representation of constant member pointers: you'd really have to track an arbitrary chain of hierarchy conversions and reinterpretations in order to get this right. Ultimately, this seems less complex. I also wasn't quite sure how to extend the constant evaluator to handle foldings that we don't actually want to treat as extended constant expressions. llvm-svn: 150551 --- clang/include/clang/AST/OperationKinds.h | 9 ++ clang/lib/AST/Expr.cpp | 7 + clang/lib/AST/ExprConstant.cpp | 2 + clang/lib/CodeGen/CGCXXABI.cpp | 26 ++++ clang/lib/CodeGen/CGCXXABI.h | 18 ++- clang/lib/CodeGen/CGExpr.cpp | 1 + clang/lib/CodeGen/CGExprAgg.cpp | 1 + clang/lib/CodeGen/CGExprComplex.cpp | 1 + clang/lib/CodeGen/CGExprConstant.cpp | 9 +- clang/lib/CodeGen/CGExprScalar.cpp | 1 + clang/lib/CodeGen/ItaniumCXXABI.cpp | 128 ++++++++++++------ clang/lib/Sema/SemaCast.cpp | 3 +- clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp | 1 + .../CodeGenCXX/member-function-pointers.cpp | 40 ++++++ 14 files changed, 200 insertions(+), 47 deletions(-) diff --git a/clang/include/clang/AST/OperationKinds.h b/clang/include/clang/AST/OperationKinds.h index 83480338461f..8cf79b2bfa87 100644 --- a/clang/include/clang/AST/OperationKinds.h +++ b/clang/include/clang/AST/OperationKinds.h @@ -117,6 +117,15 @@ enum CastKind { /// against the null member pointer. CK_MemberPointerToBoolean, + /// CK_ReinterpretMemberPointer - Reinterpret a member pointer as a + /// different kind of member pointer. C++ forbids this from + /// crossing between function and object types, but otherwise does + /// not restrict it. However, the only operation that is permitted + /// on a "punned" member pointer is casting it back to the original + /// type, which is required to be a lossless operation (although + /// many ABIs do not guarantee this on all possible intermediate types). + CK_ReinterpretMemberPointer, + /// CK_UserDefinedConversion - Conversion using a user defined type /// conversion function. /// struct A { operator int(); }; int i = int(A()); diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp index 5b511cc88315..f9f7ba542cdf 100644 --- a/clang/lib/AST/Expr.cpp +++ b/clang/lib/AST/Expr.cpp @@ -1053,6 +1053,11 @@ void CastExpr::CheckCastConsistency() const { assert(getSubExpr()->getType()->isBlockPointerType()); goto CheckNoBasePath; + case CK_ReinterpretMemberPointer: + assert(getType()->isMemberPointerType()); + assert(getSubExpr()->getType()->isMemberPointerType()); + goto CheckNoBasePath; + case CK_BitCast: // Arbitrary casts to C pointer types count as bitcasts. // Otherwise, we should only have block and ObjC pointer casts @@ -1156,6 +1161,8 @@ const char *CastExpr::getCastKindName() const { return "BaseToDerivedMemberPointer"; case CK_DerivedToBaseMemberPointer: return "DerivedToBaseMemberPointer"; + case CK_ReinterpretMemberPointer: + return "ReinterpretMemberPointer"; case CK_UserDefinedConversion: return "UserDefinedConversion"; case CK_ConstructorConversion: diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp index e33ca6dc650e..6ad993890600 100644 --- a/clang/lib/AST/ExprConstant.cpp +++ b/clang/lib/AST/ExprConstant.cpp @@ -4974,6 +4974,7 @@ bool IntExprEvaluator::VisitCastExpr(const CastExpr *E) { case CK_NullToMemberPointer: case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: + case CK_ReinterpretMemberPointer: case CK_ConstructorConversion: case CK_IntegralToPointer: case CK_ToVoid: @@ -5450,6 +5451,7 @@ bool ComplexExprEvaluator::VisitCastExpr(const CastExpr *E) { case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: case CK_MemberPointerToBoolean: + case CK_ReinterpretMemberPointer: case CK_ConstructorConversion: case CK_IntegralToPointer: case CK_PointerToIntegral: diff --git a/clang/lib/CodeGen/CGCXXABI.cpp b/clang/lib/CodeGen/CGCXXABI.cpp index e5d3f2da6b6c..fc3f45d75bf5 100644 --- a/clang/lib/CodeGen/CGCXXABI.cpp +++ b/clang/lib/CodeGen/CGCXXABI.cpp @@ -71,6 +71,11 @@ llvm::Value *CGCXXABI::EmitMemberPointerConversion(CodeGenFunction &CGF, return GetBogusMemberPointer(CGM, E->getType()); } +llvm::Constant *CGCXXABI::EmitMemberPointerConversion(const CastExpr *E, + llvm::Constant *Src) { + return GetBogusMemberPointer(CGM, E->getType()); +} + llvm::Value * CGCXXABI::EmitMemberPointerComparison(CodeGenFunction &CGF, llvm::Value *L, @@ -172,3 +177,24 @@ void CGCXXABI::EmitGuardedInit(CodeGenFunction &CGF, bool PerformInit) { ErrorUnsupportedABI(CGF, "static local variable initialization"); } + +/// Returns the adjustment, in bytes, required for the given +/// member-pointer operation. Returns null if no adjustment is +/// required. +llvm::Constant *CGCXXABI::getMemberPointerAdjustment(const CastExpr *E) { + assert(E->getCastKind() == CK_DerivedToBaseMemberPointer || + E->getCastKind() == CK_BaseToDerivedMemberPointer); + + QualType derivedType; + if (E->getCastKind() == CK_DerivedToBaseMemberPointer) + derivedType = E->getSubExpr()->getType(); + else + derivedType = E->getType(); + + const CXXRecordDecl *derivedClass = + derivedType->castAs()->getClass()->getAsCXXRecordDecl(); + + return CGM.GetNonVirtualBaseClassOffset(derivedClass, + E->path_begin(), + E->path_end()); +} diff --git a/clang/lib/CodeGen/CGCXXABI.h b/clang/lib/CodeGen/CGCXXABI.h index 4bacd014036a..4e045f5f3275 100644 --- a/clang/lib/CodeGen/CGCXXABI.h +++ b/clang/lib/CodeGen/CGCXXABI.h @@ -100,12 +100,17 @@ public: llvm::Value *MemPtr, const MemberPointerType *MPT); - /// Perform a derived-to-base or base-to-derived member pointer - /// conversion. + /// Perform a derived-to-base, base-to-derived, or bitcast member + /// pointer conversion. virtual llvm::Value *EmitMemberPointerConversion(CodeGenFunction &CGF, const CastExpr *E, llvm::Value *Src); + /// Perform a derived-to-base, base-to-derived, or bitcast member + /// pointer conversion on a constant value. + virtual llvm::Constant *EmitMemberPointerConversion(const CastExpr *E, + llvm::Constant *Src); + /// Return true if the given member pointer can be zero-initialized /// (in the C++ sense) with an LLVM zeroinitializer. virtual bool isZeroInitializable(const MemberPointerType *MPT); @@ -137,6 +142,15 @@ public: llvm::Value *MemPtr, const MemberPointerType *MPT); +protected: + /// A utility method for computing the offset required for the given + /// base-to-derived or derived-to-base member-pointer conversion. + /// Does not handle virtual conversions (in case we ever fully + /// support an ABI that allows this). Returns null if no adjustment + /// is required. + llvm::Constant *getMemberPointerAdjustment(const CastExpr *E); + +public: /// Build the signature of the given constructor variant by adding /// any required parameters. For convenience, ResTy has been /// initialized to 'void', and ArgTys has been initialized with the diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp index 95bed1b0e617..f67025a32cf0 100644 --- a/clang/lib/CodeGen/CGExpr.cpp +++ b/clang/lib/CodeGen/CGExpr.cpp @@ -2090,6 +2090,7 @@ LValue CodeGenFunction::EmitCastLValue(const CastExpr *E) { case CK_DerivedToBaseMemberPointer: case CK_BaseToDerivedMemberPointer: case CK_MemberPointerToBoolean: + case CK_ReinterpretMemberPointer: case CK_AnyPointerToBlockPointerCast: case CK_ARCProduceObject: case CK_ARCConsumeObject: diff --git a/clang/lib/CodeGen/CGExprAgg.cpp b/clang/lib/CodeGen/CGExprAgg.cpp index a85cb9dbc3ac..91f9db0bfeba 100644 --- a/clang/lib/CodeGen/CGExprAgg.cpp +++ b/clang/lib/CodeGen/CGExprAgg.cpp @@ -360,6 +360,7 @@ void AggExprEmitter::VisitCastExpr(CastExpr *E) { case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: case CK_MemberPointerToBoolean: + case CK_ReinterpretMemberPointer: case CK_IntegralToPointer: case CK_PointerToIntegral: case CK_PointerToBoolean: diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp index 53f7d65ef1b2..15fa225eb85b 100644 --- a/clang/lib/CodeGen/CGExprComplex.cpp +++ b/clang/lib/CodeGen/CGExprComplex.cpp @@ -388,6 +388,7 @@ ComplexPairTy ComplexExprEmitter::EmitCast(CastExpr::CastKind CK, Expr *Op, case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: case CK_MemberPointerToBoolean: + case CK_ReinterpretMemberPointer: case CK_ConstructorConversion: case CK_IntegralToPointer: case CK_PointerToIntegral: diff --git a/clang/lib/CodeGen/CGExprConstant.cpp b/clang/lib/CodeGen/CGExprConstant.cpp index 44531c0992c8..985e53227e78 100644 --- a/clang/lib/CodeGen/CGExprConstant.cpp +++ b/clang/lib/CodeGen/CGExprConstant.cpp @@ -620,6 +620,11 @@ public: case CK_Dependent: llvm_unreachable("saw dependent cast!"); + case CK_ReinterpretMemberPointer: + case CK_DerivedToBaseMemberPointer: + case CK_BaseToDerivedMemberPointer: + return CGM.getCXXABI().EmitMemberPointerConversion(E, C); + // These will never be supported. case CK_ObjCObjectLValueCast: case CK_ARCProduceObject: @@ -630,18 +635,16 @@ public: // These don't need to be handled here because Evaluate knows how to // evaluate them in the cases where they can be folded. + case CK_BitCast: case CK_ToVoid: case CK_Dynamic: case CK_LValueBitCast: case CK_NullToMemberPointer: - case CK_DerivedToBaseMemberPointer: - case CK_BaseToDerivedMemberPointer: case CK_UserDefinedConversion: case CK_ConstructorConversion: case CK_CPointerToObjCPointerCast: case CK_BlockPointerToObjCPointerCast: case CK_AnyPointerToBlockPointerCast: - case CK_BitCast: case CK_ArrayToPointerDecay: case CK_FunctionToPointerDecay: case CK_BaseToDerived: diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp index d9b0e21238b1..8bd4c2b5aa2e 100644 --- a/clang/lib/CodeGen/CGExprScalar.cpp +++ b/clang/lib/CodeGen/CGExprScalar.cpp @@ -1122,6 +1122,7 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) { return CGF.CGM.getCXXABI().EmitNullMemberPointer(MPT); } + case CK_ReinterpretMemberPointer: case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: { Value *Src = Visit(E); diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp index a8b994288292..8d06b6011c01 100644 --- a/clang/lib/CodeGen/ItaniumCXXABI.cpp +++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp @@ -73,6 +73,8 @@ public: llvm::Value *EmitMemberPointerConversion(CodeGenFunction &CGF, const CastExpr *E, llvm::Value *Src); + llvm::Constant *EmitMemberPointerConversion(const CastExpr *E, + llvm::Constant *Src); llvm::Constant *EmitNullMemberPointer(const MemberPointerType *MPT); @@ -312,7 +314,10 @@ llvm::Value *ItaniumCXXABI::EmitMemberDataPointerAddress(CodeGenFunction &CGF, return Builder.CreateBitCast(Addr, PType); } -/// Perform a derived-to-base or base-to-derived member pointer conversion. +/// Perform a bitcast, derived-to-base, or base-to-derived member pointer +/// conversion. +/// +/// Bitcast conversions are always a no-op under Itanium. /// /// Obligatory offset/adjustment diagram: /// <-- offset --> <-- adjustment --> @@ -335,64 +340,105 @@ llvm::Value *ItaniumCXXABI::EmitMemberDataPointerAddress(CodeGenFunction &CGF, llvm::Value * ItaniumCXXABI::EmitMemberPointerConversion(CodeGenFunction &CGF, const CastExpr *E, - llvm::Value *Src) { + llvm::Value *src) { assert(E->getCastKind() == CK_DerivedToBaseMemberPointer || - E->getCastKind() == CK_BaseToDerivedMemberPointer); + E->getCastKind() == CK_BaseToDerivedMemberPointer || + E->getCastKind() == CK_ReinterpretMemberPointer); + + // Under Itanium, reinterprets don't require any additional processing. + if (E->getCastKind() == CK_ReinterpretMemberPointer) return src; + + // Use constant emission if we can. + if (isa(src)) + return EmitMemberPointerConversion(E, cast(src)); + + llvm::Constant *adj = getMemberPointerAdjustment(E); + if (!adj) return src; CGBuilderTy &Builder = CGF.Builder; + bool isDerivedToBase = (E->getCastKind() == CK_DerivedToBaseMemberPointer); - const MemberPointerType *SrcTy = - E->getSubExpr()->getType()->getAs(); - const MemberPointerType *DestTy = E->getType()->getAs(); - - const CXXRecordDecl *SrcDecl = SrcTy->getClass()->getAsCXXRecordDecl(); - const CXXRecordDecl *DestDecl = DestTy->getClass()->getAsCXXRecordDecl(); - - bool DerivedToBase = - E->getCastKind() == CK_DerivedToBaseMemberPointer; - - const CXXRecordDecl *DerivedDecl; - if (DerivedToBase) - DerivedDecl = SrcDecl; - else - DerivedDecl = DestDecl; - - llvm::Constant *Adj = - CGF.CGM.GetNonVirtualBaseClassOffset(DerivedDecl, - E->path_begin(), - E->path_end()); - if (!Adj) return Src; + const MemberPointerType *destTy = + E->getType()->castAs(); // For member data pointers, this is just a matter of adding the // offset if the source is non-null. - if (SrcTy->isMemberDataPointer()) { - llvm::Value *Dst; - if (DerivedToBase) - Dst = Builder.CreateNSWSub(Src, Adj, "adj"); + if (destTy->isMemberDataPointer()) { + llvm::Value *dst; + if (isDerivedToBase) + dst = Builder.CreateNSWSub(src, adj, "adj"); else - Dst = Builder.CreateNSWAdd(Src, Adj, "adj"); + dst = Builder.CreateNSWAdd(src, adj, "adj"); // Null check. - llvm::Value *Null = llvm::Constant::getAllOnesValue(Src->getType()); - llvm::Value *IsNull = Builder.CreateICmpEQ(Src, Null, "memptr.isnull"); - return Builder.CreateSelect(IsNull, Src, Dst); + llvm::Value *null = llvm::Constant::getAllOnesValue(src->getType()); + llvm::Value *isNull = Builder.CreateICmpEQ(src, null, "memptr.isnull"); + return Builder.CreateSelect(isNull, src, dst); } // The this-adjustment is left-shifted by 1 on ARM. if (IsARM) { - uint64_t Offset = cast(Adj)->getZExtValue(); - Offset <<= 1; - Adj = llvm::ConstantInt::get(Adj->getType(), Offset); + uint64_t offset = cast(adj)->getZExtValue(); + offset <<= 1; + adj = llvm::ConstantInt::get(adj->getType(), offset); } - llvm::Value *SrcAdj = Builder.CreateExtractValue(Src, 1, "src.adj"); - llvm::Value *DstAdj; - if (DerivedToBase) - DstAdj = Builder.CreateNSWSub(SrcAdj, Adj, "adj"); + llvm::Value *srcAdj = Builder.CreateExtractValue(src, 1, "src.adj"); + llvm::Value *dstAdj; + if (isDerivedToBase) + dstAdj = Builder.CreateNSWSub(srcAdj, adj, "adj"); else - DstAdj = Builder.CreateNSWAdd(SrcAdj, Adj, "adj"); + dstAdj = Builder.CreateNSWAdd(srcAdj, adj, "adj"); - return Builder.CreateInsertValue(Src, DstAdj, 1); + return Builder.CreateInsertValue(src, dstAdj, 1); +} + +llvm::Constant * +ItaniumCXXABI::EmitMemberPointerConversion(const CastExpr *E, + llvm::Constant *src) { + assert(E->getCastKind() == CK_DerivedToBaseMemberPointer || + E->getCastKind() == CK_BaseToDerivedMemberPointer || + E->getCastKind() == CK_ReinterpretMemberPointer); + + // Under Itanium, reinterprets don't require any additional processing. + if (E->getCastKind() == CK_ReinterpretMemberPointer) return src; + + // If the adjustment is trivial, we don't need to do anything. + llvm::Constant *adj = getMemberPointerAdjustment(E); + if (!adj) return src; + + bool isDerivedToBase = (E->getCastKind() == CK_DerivedToBaseMemberPointer); + + const MemberPointerType *destTy = + E->getType()->castAs(); + + // For member data pointers, this is just a matter of adding the + // offset if the source is non-null. + if (destTy->isMemberDataPointer()) { + // null maps to null. + if (src->isAllOnesValue()) return src; + + if (isDerivedToBase) + return llvm::ConstantExpr::getNSWSub(src, adj); + else + return llvm::ConstantExpr::getNSWAdd(src, adj); + } + + // The this-adjustment is left-shifted by 1 on ARM. + if (IsARM) { + uint64_t offset = cast(adj)->getZExtValue(); + offset <<= 1; + adj = llvm::ConstantInt::get(adj->getType(), offset); + } + + llvm::Constant *srcAdj = llvm::ConstantExpr::getExtractValue(src, 1); + llvm::Constant *dstAdj; + if (isDerivedToBase) + dstAdj = llvm::ConstantExpr::getNSWSub(srcAdj, adj); + else + dstAdj = llvm::ConstantExpr::getNSWAdd(srcAdj, adj); + + return llvm::ConstantExpr::getInsertValue(src, dstAdj, 1); } llvm::Constant * diff --git a/clang/lib/Sema/SemaCast.cpp b/clang/lib/Sema/SemaCast.cpp index c89582ff0078..a36f6cbb009d 100644 --- a/clang/lib/Sema/SemaCast.cpp +++ b/clang/lib/Sema/SemaCast.cpp @@ -1576,7 +1576,8 @@ static TryCastResult TryReinterpretCast(Sema &Self, ExprResult &SrcExpr, } // A valid member pointer cast. - Kind = IsLValueCast? CK_LValueBitCast : CK_BitCast; + assert(!IsLValueCast); + Kind = CK_ReinterpretMemberPointer; return TC_Success; } diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp index 254540468a76..c1f804ce09ba 100644 --- a/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp +++ b/clang/lib/StaticAnalyzer/Core/ExprEngineC.cpp @@ -289,6 +289,7 @@ void ExprEngine::VisitCast(const CastExpr *CastE, const Expr *Ex, case CK_NullToMemberPointer: case CK_BaseToDerivedMemberPointer: case CK_DerivedToBaseMemberPointer: + case CK_ReinterpretMemberPointer: case CK_UserDefinedConversion: case CK_ConstructorConversion: case CK_VectorSplat: diff --git a/clang/test/CodeGenCXX/member-function-pointers.cpp b/clang/test/CodeGenCXX/member-function-pointers.cpp index 5ce5fbf760db..2417aa41918b 100644 --- a/clang/test/CodeGenCXX/member-function-pointers.cpp +++ b/clang/test/CodeGenCXX/member-function-pointers.cpp @@ -28,6 +28,16 @@ void (C::*pc2)() = &C::f; // CHECK: @pc3 = global { i64, i64 } { i64 1, i64 0 }, align 8 void (A::*pc3)() = &A::vf1; +// Tests for test10. +// CHECK: @_ZN6test101aE = global { i64, i64 } { i64 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i64), i64 0 }, align 8 +// CHECK: @_ZN6test101bE = global { i64, i64 } { i64 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i64), i64 8 }, align 8 +// CHECK: @_ZN6test101cE = global { i64, i64 } { i64 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i64), i64 8 }, align 8 +// CHECK: @_ZN6test101dE = global { i64, i64 } { i64 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i64), i64 16 }, align 8 +// CHECK-LP32: @_ZN6test101aE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 0 }, align 4 +// CHECK-LP32: @_ZN6test101bE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 4 }, align 4 +// CHECK-LP32: @_ZN6test101cE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 4 }, align 4 +// CHECK-LP32: @_ZN6test101dE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 8 }, align 4 + void f() { // CHECK: store { i64, i64 } zeroinitializer, { i64, i64 }* @pa pa = 0; @@ -232,3 +242,33 @@ namespace test9 { static S array[] = { (fooptr) &B::foo }; } } + +// rdar://problem/10815683 - Verify that we can emit reinterprets of +// member pointers as constant initializers. For added trickiness, +// we also add some non-trivial adjustments. +namespace test10 { + struct A { + int nonEmpty; + void foo(); + }; + struct B : public A { + virtual void requireNonZeroAdjustment(); + }; + struct C { + int nonEmpty; + }; + struct D : public C { + virtual void requireNonZeroAdjustment(); + }; + + // Non-ARM tests at top of file. + void (A::*a)() = &A::foo; + void (B::*b)() = (void (B::*)()) &A::foo; + void (C::*c)() = (void (C::*)()) (void (B::*)()) &A::foo; + void (D::*d)() = (void (C::*)()) (void (B::*)()) &A::foo; +} +// It's not that the offsets are doubled on ARM, it's that they're left-shifted by 1. +// CHECK-ARM: @_ZN6test101aE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 0 }, align 4 +// CHECK-ARM: @_ZN6test101bE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 8 }, align 4 +// CHECK-ARM: @_ZN6test101cE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 8 }, align 4 +// CHECK-ARM: @_ZN6test101dE = global { i32, i32 } { i32 ptrtoint (void (%"struct.test10::A"*)* @_ZN6test101A3fooEv to i32), i32 16 }, align 4