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1fbe1a8ba7672cbccd95c8a76437ef8d2c6249a2
clang-p2996/clang/test/CodeGenCXX/microsoft-abi-member-pointers.cpp
Reid Kleckner c34735148f Make all virtual member pointers use variadic musttail calls 
This avoids encoding information about the function prototype into the
thunk at the cost of some function prototype bitcast gymnastics.

Fixes PR20653.

llvm-svn: 216782
2014-08-29 21:43:29 +00:00

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26 KiB
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// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -fms-extensions | FileCheck %s
// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm %s -o - -triple=x86_64-pc-win32 -fms-extensions | FileCheck %s -check-prefix=X64
// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -DINCOMPLETE_VIRTUAL -fms-extensions -verify
// RUN: %clang_cc1 -std=c++11 -fno-rtti -emit-llvm %s -o - -triple=i386-pc-win32 -DINCOMPLETE_VIRTUAL -DMEMFUN -fms-extensions -verify
// FIXME: Test x86_64 member pointers when codegen no longer asserts on records
// with virtual bases.
#ifndef INCOMPLETE_VIRTUAL
struct B1 {
void foo();
int b;
};
struct B2 {
int b2;
void foo();
};
struct Single : B1 {
void foo();
};
struct Multiple : B1, B2 {
int m;
void foo();
};
struct Virtual : virtual B1 {
int v;
void foo();
};
struct POD {
int a;
int b;
};
struct Polymorphic {
virtual void myVirtual();
int a;
int b;
};
// This class uses the virtual inheritance model, yet its vbptr offset is not 0.
// We still use zero for the null field offset, despite it being a valid field
// offset.
struct NonZeroVBPtr : POD, Virtual {
int n;
void foo();
};
struct Unspecified;
struct UnspecSingle;
// Check that we can lower the LLVM types and get the null initializers right.
int Single ::*s_d_memptr;
int Polymorphic::*p_d_memptr;
int Multiple ::*m_d_memptr;
int Virtual ::*v_d_memptr;
int NonZeroVBPtr::*n_d_memptr;
int Unspecified::*u_d_memptr;
int UnspecSingle::*us_d_memptr;
// CHECK: @"\01?s_d_memptr@@3PQSingle@@HQ1@" = global i32 -1, align 4
// CHECK: @"\01?p_d_memptr@@3PQPolymorphic@@HQ1@" = global i32 0, align 4
// CHECK: @"\01?m_d_memptr@@3PQMultiple@@HQ1@" = global i32 -1, align 4
// CHECK: @"\01?v_d_memptr@@3PQVirtual@@HQ1@" = global { i32, i32 }
// CHECK: { i32 0, i32 -1 }, align 8
// CHECK: @"\01?n_d_memptr@@3PQNonZeroVBPtr@@HQ1@" = global { i32, i32 }
// CHECK: { i32 0, i32 -1 }, align 8
// CHECK: @"\01?u_d_memptr@@3PQUnspecified@@HQ1@" = global { i32, i32, i32 }
// CHECK: { i32 0, i32 0, i32 -1 }, align 8
// CHECK: @"\01?us_d_memptr@@3PQUnspecSingle@@HQ1@" = global { i32, i32, i32 }
// CHECK: { i32 0, i32 0, i32 -1 }, align 8
void (Single ::*s_f_memptr)();
void (Multiple::*m_f_memptr)();
void (Virtual ::*v_f_memptr)();
// CHECK: @"\01?s_f_memptr@@3P8Single@@AEXXZQ1@" = global i8* null, align 4
// CHECK: @"\01?m_f_memptr@@3P8Multiple@@AEXXZQ1@" = global { i8*, i32 } zeroinitializer, align 8
// CHECK: @"\01?v_f_memptr@@3P8Virtual@@AEXXZQ1@" = global { i8*, i32, i32 } zeroinitializer, align 8
// We can define Unspecified after locking in the inheritance model.
struct Unspecified : Multiple, Virtual {
void foo();
int u;
};
struct UnspecSingle {
void foo();
};
// Test memptr emission in a constant expression.
namespace Const {
void (Single ::*s_f_mp)() = &Single::foo;
void (Multiple ::*m_f_mp)() = &B2::foo;
void (Virtual ::*v_f_mp)() = &Virtual::foo;
void (Unspecified::*u_f_mp)() = &Unspecified::foo;
void (UnspecSingle::*us_f_mp)() = &UnspecSingle::foo;
// CHECK: @"\01?s_f_mp@Const@@3P8Single@@AEXXZQ2@" =
// CHECK: global i8* bitcast ({{.*}} @"\01?foo@Single@@QAEXXZ" to i8*), align 4
// CHECK: @"\01?m_f_mp@Const@@3P8Multiple@@AEXXZQ2@" =
// CHECK: global { i8*, i32 } { i8* bitcast ({{.*}} @"\01?foo@B2@@QAEXXZ" to i8*), i32 4 }, align 8
// CHECK: @"\01?v_f_mp@Const@@3P8Virtual@@AEXXZQ2@" =
// CHECK: global { i8*, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@Virtual@@QAEXXZ" to i8*), i32 0, i32 0 }, align 8
// CHECK: @"\01?u_f_mp@Const@@3P8Unspecified@@AEXXZQ2@" =
// CHECK: global { i8*, i32, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@Unspecified@@QAEXXZ" to i8*), i32 0, i32 12, i32 0 }, align 8
// CHECK: @"\01?us_f_mp@Const@@3P8UnspecSingle@@AEXXZQ2@" =
// CHECK: global { i8*, i32, i32, i32 } { i8* bitcast ({{.*}} @"\01?foo@UnspecSingle@@QAEXXZ" to i8*), i32 0, i32 0, i32 0 }, align 8
}
namespace CastParam {
// This exercises ConstExprEmitter instead of ValueDecl::evaluateValue. The
// extra reinterpret_cast for the parameter type requires more careful folding.
// FIXME: Or does it? If reinterpret_casts are no-ops, we should be able to
// strip them in evaluateValue() and just proceed as normal with an APValue.
struct A {
int a;
void foo(A *p);
};
struct B { int b; };
struct C : B, A { int c; };
void (A::*ptr1)(void *) = (void (A::*)(void *)) &A::foo;
// CHECK: @"\01?ptr1@CastParam@@3P8A@1@AEXPAX@ZQ21@" =
// CHECK: global i8* bitcast (void ({{.*}})* @"\01?foo@A@CastParam@@QAEXPAU12@@Z" to i8*), align 4
// Try a reinterpret_cast followed by a memptr conversion.
void (C::*ptr2)(void *) = (void (C::*)(void *)) (void (A::*)(void *)) &A::foo;
// CHECK: @"\01?ptr2@CastParam@@3P8C@1@AEXPAX@ZQ21@" =
// CHECK: global { i8*, i32 } { i8* bitcast (void ({{.*}})* @"\01?foo@A@CastParam@@QAEXPAU12@@Z" to i8*), i32 4 }, align 8
void (C::*ptr3)(void *) = (void (C::*)(void *)) (void (A::*)(void *)) (void (A::*)(A *)) 0;
// CHECK: @"\01?ptr3@CastParam@@3P8C@1@AEXPAX@ZQ21@" =
// CHECK: global { i8*, i32 } zeroinitializer, align 8
struct D : C {
virtual void isPolymorphic();
int d;
};
// Try a cast that changes the inheritance model. Null for D is 0, but null for
// C is -1. We need the cast to long in order to hit the non-APValue path.
int C::*ptr4 = (int C::*) (int D::*) (long D::*) 0;
// CHECK: @"\01?ptr4@CastParam@@3PQC@1@HQ21@" = global i32 -1, align 4
// MSVC rejects this but we accept it.
int C::*ptr5 = (int C::*) (long D::*) 0;
// CHECK: @"\01?ptr5@CastParam@@3PQC@1@HQ21@" = global i32 -1, align 4
}
struct UnspecWithVBPtr;
int UnspecWithVBPtr::*forceUnspecWithVBPtr;
struct UnspecWithVBPtr : B1, virtual B2 {
int u;
void foo();
};
// Test emitting non-virtual member pointers in a non-constexpr setting.
void EmitNonVirtualMemberPointers() {
void (Single ::*s_f_memptr)() = &Single::foo;
void (Multiple ::*m_f_memptr)() = &Multiple::foo;
void (Virtual ::*v_f_memptr)() = &Virtual::foo;
void (Unspecified::*u_f_memptr)() = &Unspecified::foo;
void (UnspecWithVBPtr::*u2_f_memptr)() = &UnspecWithVBPtr::foo;
// CHECK: define void @"\01?EmitNonVirtualMemberPointers@@YAXXZ"() {{.*}} {
// CHECK: alloca i8*, align 4
// CHECK: alloca { i8*, i32 }, align 8
// CHECK: alloca { i8*, i32, i32 }, align 8
// CHECK: alloca { i8*, i32, i32, i32 }, align 8
// CHECK: store i8* bitcast (void (%{{.*}}*)* @"\01?foo@Single@@QAEXXZ" to i8*), i8** %{{.*}}, align 4
// CHECK: store { i8*, i32 }
// CHECK: { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Multiple@@QAEXXZ" to i8*), i32 0 },
// CHECK: { i8*, i32 }* %{{.*}}, align 8
// CHECK: store { i8*, i32, i32 }
// CHECK: { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Virtual@@QAEXXZ" to i8*), i32 0, i32 0 },
// CHECK: { i8*, i32, i32 }* %{{.*}}, align 8
// CHECK: store { i8*, i32, i32, i32 }
// CHECK: { i8* bitcast (void (%{{.*}}*)* @"\01?foo@Unspecified@@QAEXXZ" to i8*), i32 0, i32 12, i32 0 },
// CHECK: { i8*, i32, i32, i32 }* %{{.*}}, align 8
// CHECK: store { i8*, i32, i32, i32 }
// CHECK: { i8* bitcast (void (%{{.*}}*)* @"\01?foo@UnspecWithVBPtr@@QAEXXZ" to i8*),
// CHECK: i32 0, i32 4, i32 0 },
// CHECK: { i8*, i32, i32, i32 }* %{{.*}}, align 8
// CHECK: ret void
// CHECK: }
}
void podMemPtrs() {
int POD::*memptr;
memptr = &POD::a;
memptr = &POD::b;
if (memptr)
memptr = 0;
// Check that member pointers use the right offsets and that null is -1.
// CHECK: define void @"\01?podMemPtrs@@YAXXZ"() {{.*}} {
// CHECK: %[[memptr:.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 0, i32* %[[memptr]], align 4
// CHECK-NEXT: store i32 4, i32* %[[memptr]], align 4
// CHECK-NEXT: %[[memptr_val:.*]] = load i32* %[[memptr]], align 4
// CHECK-NEXT: %{{.*}} = icmp ne i32 %[[memptr_val]], -1
// CHECK-NEXT: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
// CHECK: store i32 -1, i32* %[[memptr]], align 4
// CHECK: ret void
// CHECK: }
}
void polymorphicMemPtrs() {
int Polymorphic::*memptr;
memptr = &Polymorphic::a;
memptr = &Polymorphic::b;
if (memptr)
memptr = 0;
// Member pointers for polymorphic classes include the vtable slot in their
// offset and use 0 to represent null.
// CHECK: define void @"\01?polymorphicMemPtrs@@YAXXZ"() {{.*}} {
// CHECK: %[[memptr:.*]] = alloca i32, align 4
// CHECK-NEXT: store i32 4, i32* %[[memptr]], align 4
// CHECK-NEXT: store i32 8, i32* %[[memptr]], align 4
// CHECK-NEXT: %[[memptr_val:.*]] = load i32* %[[memptr]], align 4
// CHECK-NEXT: %{{.*}} = icmp ne i32 %[[memptr_val]], 0
// CHECK-NEXT: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
// CHECK: store i32 0, i32* %[[memptr]], align 4
// CHECK: ret void
// CHECK: }
}
bool nullTestDataUnspecified(int Unspecified::*mp) {
return mp;
// CHECK: define zeroext i1 @"\01?nullTestDataUnspecified@@YA_NPQUnspecified@@H@Z"{{.*}} {
// CHECK: %{{.*}} = load { i32, i32, i32 }* %{{.*}}, align 8
// CHECK: store { i32, i32, i32 } {{.*}} align 8
// CHECK: %[[mp:.*]] = load { i32, i32, i32 }* %{{.*}}, align 8
// CHECK: %[[mp0:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 0
// CHECK: %[[cmp0:.*]] = icmp ne i32 %[[mp0]], 0
// CHECK: %[[mp1:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 1
// CHECK: %[[cmp1:.*]] = icmp ne i32 %[[mp1]], 0
// CHECK: %[[and0:.*]] = or i1 %[[cmp0]], %[[cmp1]]
// CHECK: %[[mp2:.*]] = extractvalue { i32, i32, i32 } %[[mp]], 2
// CHECK: %[[cmp2:.*]] = icmp ne i32 %[[mp2]], -1
// CHECK: %[[and1:.*]] = or i1 %[[and0]], %[[cmp2]]
// CHECK: ret i1 %[[and1]]
// CHECK: }
// Pass this large type indirectly.
// X64-LABEL: define zeroext i1 @"\01?nullTestDataUnspecified@@
// X64: ({ i32, i32, i32 }*)
}
bool nullTestFunctionUnspecified(void (Unspecified::*mp)()) {
return mp;
// CHECK: define zeroext i1 @"\01?nullTestFunctionUnspecified@@YA_NP8Unspecified@@AEXXZ@Z"{{.*}} {
// CHECK: %{{.*}} = load { i8*, i32, i32, i32 }* %{{.*}}, align 8
// CHECK: store { i8*, i32, i32, i32 } {{.*}} align 8
// CHECK: %[[mp:.*]] = load { i8*, i32, i32, i32 }* %{{.*}}, align 8
// CHECK: %[[mp0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[mp]], 0
// CHECK: %[[cmp0:.*]] = icmp ne i8* %[[mp0]], null
// CHECK: ret i1 %[[cmp0]]
// CHECK: }
}
int loadDataMemberPointerVirtual(Virtual *o, int Virtual::*memptr) {
return o->*memptr;
// Test that we can unpack this aggregate member pointer and load the member
// data pointer.
// CHECK: define i32 @"\01?loadDataMemberPointerVirtual@@YAHPAUVirtual@@PQ1@H@Z"{{.*}} {
// CHECK: %[[o:.*]] = load %{{.*}}** %{{.*}}, align 4
// CHECK: %[[memptr:.*]] = load { i32, i32 }* %{{.*}}, align 8
// CHECK: %[[memptr0:.*]] = extractvalue { i32, i32 } %[[memptr:.*]], 0
// CHECK: %[[memptr1:.*]] = extractvalue { i32, i32 } %[[memptr:.*]], 1
// CHECK: %[[v6:.*]] = bitcast %{{.*}}* %[[o]] to i8*
// CHECK: %[[vbptr:.*]] = getelementptr inbounds i8* %[[v6]], i32 0
// CHECK: %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i8**
// CHECK: %[[vbtable:.*]] = load i8** %[[vbptr_a:.*]]
// CHECK: %[[v7:.*]] = getelementptr inbounds i8* %[[vbtable]], i32 %[[memptr1]]
// CHECK: %[[v8:.*]] = bitcast i8* %[[v7]] to i32*
// CHECK: %[[vbase_offs:.*]] = load i32* %[[v8]]
// CHECK: %[[v10:.*]] = getelementptr inbounds i8* %[[vbptr]], i32 %[[vbase_offs]]
// CHECK: %[[offset:.*]] = getelementptr inbounds i8* %[[v10]], i32 %[[memptr0]]
// CHECK: %[[v11:.*]] = bitcast i8* %[[offset]] to i32*
// CHECK: %[[v12:.*]] = load i32* %[[v11]]
// CHECK: ret i32 %[[v12]]
// CHECK: }
// A two-field data memptr on x64 gets coerced to i64 and is passed in a
// register or memory.
// X64-LABEL: define i32 @"\01?loadDataMemberPointerVirtual@@YAHPEAUVirtual@@PEQ1@H@Z"
// X64: (%struct.Virtual* %o, i64 %memptr.coerce)
}
int loadDataMemberPointerUnspecified(Unspecified *o, int Unspecified::*memptr) {
return o->*memptr;
// Test that we can unpack this aggregate member pointer and load the member
// data pointer.
// CHECK: define i32 @"\01?loadDataMemberPointerUnspecified@@YAHPAUUnspecified@@PQ1@H@Z"{{.*}} {
// CHECK: %[[o:.*]] = load %{{.*}}** %{{.*}}, align 4
// CHECK: %[[memptr:.*]] = load { i32, i32, i32 }* %{{.*}}, align 8
// CHECK: %[[memptr0:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 0
// CHECK: %[[memptr1:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 1
// CHECK: %[[memptr2:.*]] = extractvalue { i32, i32, i32 } %[[memptr:.*]], 2
// CHECK: %[[base:.*]] = bitcast %{{.*}}* %[[o]] to i8*
// CHECK: %[[is_vbase:.*]] = icmp ne i32 %[[memptr2]], 0
// CHECK: br i1 %[[is_vbase]], label %[[vadjust:.*]], label %[[skip:.*]]
//
// CHECK: [[vadjust]]
// CHECK: %[[vbptr:.*]] = getelementptr inbounds i8* %[[base]], i32 %[[memptr1]]
// CHECK: %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i8**
// CHECK: %[[vbtable:.*]] = load i8** %[[vbptr_a:.*]]
// CHECK: %[[v7:.*]] = getelementptr inbounds i8* %[[vbtable]], i32 %[[memptr2]]
// CHECK: %[[v8:.*]] = bitcast i8* %[[v7]] to i32*
// CHECK: %[[vbase_offs:.*]] = load i32* %[[v8]]
// CHECK: %[[base_adj:.*]] = getelementptr inbounds i8* %[[vbptr]], i32 %[[vbase_offs]]
//
// CHECK: [[skip]]
// CHECK: %[[new_base:.*]] = phi i8* [ %[[base]], %{{.*}} ], [ %[[base_adj]], %[[vadjust]] ]
// CHECK: %[[offset:.*]] = getelementptr inbounds i8* %[[new_base]], i32 %[[memptr0]]
// CHECK: %[[v11:.*]] = bitcast i8* %[[offset]] to i32*
// CHECK: %[[v12:.*]] = load i32* %[[v11]]
// CHECK: ret i32 %[[v12]]
// CHECK: }
}
void callMemberPointerSingle(Single *o, void (Single::*memptr)()) {
(o->*memptr)();
// Just look for an indirect thiscall.
// CHECK: define void @"\01?callMemberPointerSingle@@{{.*}} {{.*}} {
// CHECK: call x86_thiscallcc void %{{.*}}(%{{.*}} %{{.*}})
// CHECK: ret void
// CHECK: }
// X64-LABEL: define void @"\01?callMemberPointerSingle@@
// X64: (%struct.Single* %o, i8* %memptr)
// X64: bitcast i8* %{{[^ ]*}} to void (%struct.Single*)*
// X64: ret void
}
void callMemberPointerMultiple(Multiple *o, void (Multiple::*memptr)()) {
(o->*memptr)();
// CHECK: define void @"\01?callMemberPointerMultiple@@{{.*}} {
// CHECK: %[[memptr0:.*]] = extractvalue { i8*, i32 } %{{.*}}, 0
// CHECK: %[[memptr1:.*]] = extractvalue { i8*, i32 } %{{.*}}, 1
// CHECK: %[[this_adjusted:.*]] = getelementptr inbounds i8* %{{.*}}, i32 %[[memptr1]]
// CHECK: %[[this:.*]] = bitcast i8* %[[this_adjusted]] to {{.*}}
// CHECK: %[[fptr:.*]] = bitcast i8* %[[memptr0]] to {{.*}}
// CHECK: call x86_thiscallcc void %[[fptr]](%{{.*}} %[[this]])
// CHECK: ret void
// CHECK: }
}
void callMemberPointerVirtualBase(Virtual *o, void (Virtual::*memptr)()) {
(o->*memptr)();
// This shares a lot with virtual data member pointers.
// CHECK: define void @"\01?callMemberPointerVirtualBase@@{{.*}} {
// CHECK: %[[memptr0:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 0
// CHECK: %[[memptr1:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 1
// CHECK: %[[memptr2:.*]] = extractvalue { i8*, i32, i32 } %{{.*}}, 2
// CHECK: %[[vbptr:.*]] = getelementptr inbounds i8* %{{.*}}, i32 0
// CHECK: %[[vbptr_a:.*]] = bitcast i8* %[[vbptr]] to i8**
// CHECK: %[[vbtable:.*]] = load i8** %[[vbptr_a:.*]]
// CHECK: %[[v7:.*]] = getelementptr inbounds i8* %[[vbtable]], i32 %[[memptr2]]
// CHECK: %[[v8:.*]] = bitcast i8* %[[v7]] to i32*
// CHECK: %[[vbase_offs:.*]] = load i32* %[[v8]]
// CHECK: %[[v10:.*]] = getelementptr inbounds i8* %[[vbptr]], i32 %[[vbase_offs]]
// CHECK: %[[this_adjusted:.*]] = getelementptr inbounds i8* %[[v10]], i32 %[[memptr1]]
// CHECK: %[[fptr:.*]] = bitcast i8* %[[memptr0]] to void ({{.*}})
// CHECK: %[[this:.*]] = bitcast i8* %[[this_adjusted]] to {{.*}}
// CHECK: call x86_thiscallcc void %[[fptr]](%{{.*}} %[[this]])
// CHECK: ret void
// CHECK: }
}
bool compareSingleFunctionMemptr(void (Single::*l)(), void (Single::*r)()) {
return l == r;
// Should only be one comparison here.
// CHECK: define zeroext i1 @"\01?compareSingleFunctionMemptr@@YA_NP8Single@@AEXXZ0@Z"{{.*}} {
// CHECK-NOT: icmp
// CHECK: %[[r:.*]] = icmp eq
// CHECK-NOT: icmp
// CHECK: ret i1 %[[r]]
// CHECK: }
// X64-LABEL: define zeroext i1 @"\01?compareSingleFunctionMemptr@@
// X64: (i8* %{{[^,]*}}, i8* %{{[^)]*}})
}
bool compareNeqSingleFunctionMemptr(void (Single::*l)(), void (Single::*r)()) {
return l != r;
// Should only be one comparison here.
// CHECK: define zeroext i1 @"\01?compareNeqSingleFunctionMemptr@@YA_NP8Single@@AEXXZ0@Z"{{.*}} {
// CHECK-NOT: icmp
// CHECK: %[[r:.*]] = icmp ne
// CHECK-NOT: icmp
// CHECK: ret i1 %[[r]]
// CHECK: }
}
bool unspecFuncMemptrEq(void (Unspecified::*l)(), void (Unspecified::*r)()) {
return l == r;
// CHECK: define zeroext i1 @"\01?unspecFuncMemptrEq@@YA_NP8Unspecified@@AEXXZ0@Z"{{.*}} {
// CHECK: %[[lhs0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[l:.*]], 0
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r:.*]], 0
// CHECK: %[[cmp0:.*]] = icmp eq i8* %[[lhs0]], %{{.*}}
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 1
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 1
// CHECK: %[[cmp1:.*]] = icmp eq i32
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 2
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 2
// CHECK: %[[cmp2:.*]] = icmp eq i32
// CHECK: %[[res12:.*]] = and i1 %[[cmp1]], %[[cmp2]]
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 3
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 3
// CHECK: %[[cmp3:.*]] = icmp eq i32
// CHECK: %[[res123:.*]] = and i1 %[[res12]], %[[cmp3]]
// CHECK: %[[iszero:.*]] = icmp eq i8* %[[lhs0]], null
// CHECK: %[[bits_or_null:.*]] = or i1 %[[res123]], %[[iszero]]
// CHECK: %{{.*}} = and i1 %[[bits_or_null]], %[[cmp0]]
// CHECK: ret i1 %{{.*}}
// CHECK: }
// X64-LABEL: define zeroext i1 @"\01?unspecFuncMemptrEq@@
// X64: ({ i8*, i32, i32, i32 }*, { i8*, i32, i32, i32 }*)
}
bool unspecFuncMemptrNeq(void (Unspecified::*l)(), void (Unspecified::*r)()) {
return l != r;
// CHECK: define zeroext i1 @"\01?unspecFuncMemptrNeq@@YA_NP8Unspecified@@AEXXZ0@Z"{{.*}} {
// CHECK: %[[lhs0:.*]] = extractvalue { i8*, i32, i32, i32 } %[[l:.*]], 0
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r:.*]], 0
// CHECK: %[[cmp0:.*]] = icmp ne i8* %[[lhs0]], %{{.*}}
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 1
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 1
// CHECK: %[[cmp1:.*]] = icmp ne i32
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 2
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 2
// CHECK: %[[cmp2:.*]] = icmp ne i32
// CHECK: %[[res12:.*]] = or i1 %[[cmp1]], %[[cmp2]]
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[l]], 3
// CHECK: %{{.*}} = extractvalue { i8*, i32, i32, i32 } %[[r]], 3
// CHECK: %[[cmp3:.*]] = icmp ne i32
// CHECK: %[[res123:.*]] = or i1 %[[res12]], %[[cmp3]]
// CHECK: %[[iszero:.*]] = icmp ne i8* %[[lhs0]], null
// CHECK: %[[bits_or_null:.*]] = and i1 %[[res123]], %[[iszero]]
// CHECK: %{{.*}} = or i1 %[[bits_or_null]], %[[cmp0]]
// CHECK: ret i1 %{{.*}}
// CHECK: }
}
bool unspecDataMemptrEq(int Unspecified::*l, int Unspecified::*r) {
return l == r;
// CHECK: define zeroext i1 @"\01?unspecDataMemptrEq@@YA_NPQUnspecified@@H0@Z"{{.*}} {
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 0
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 0
// CHECK: icmp eq i32
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 1
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 1
// CHECK: icmp eq i32
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 2
// CHECK: extractvalue { i32, i32, i32 } %{{.*}}, 2
// CHECK: icmp eq i32
// CHECK: and i1
// CHECK: and i1
// CHECK: ret i1
// CHECK: }
// X64-LABEL: define zeroext i1 @"\01?unspecDataMemptrEq@@
// X64: ({ i32, i32, i32 }*, { i32, i32, i32 }*)
}
void (Multiple::*convertB2FuncToMultiple(void (B2::*mp)()))() {
return mp;
// CHECK: define i64 @"\01?convertB2FuncToMultiple@@YAP8Multiple@@AEXXZP8B2@@AEXXZ@Z"{{.*}} {
// CHECK: store
// CHECK: %[[mp:.*]] = load i8** %{{.*}}, align 4
// CHECK: icmp ne i8* %[[mp]], null
// CHECK: br i1 %{{.*}} label %{{.*}}, label %{{.*}}
//
// memptr.convert: ; preds = %entry
// CHECK: insertvalue { i8*, i32 } undef, i8* %[[mp]], 0
// CHECK: insertvalue { i8*, i32 } %{{.*}}, i32 4, 1
// CHECK: br label
//
// memptr.converted: ; preds = %memptr.convert, %entry
// CHECK: phi { i8*, i32 } [ zeroinitializer, %{{.*}} ], [ {{.*}} ]
// CHECK: }
}
void (B2::*convertMultipleFuncToB2(void (Multiple::*mp)()))() {
// FIXME: cl emits warning C4407 on this code because of the representation
// change. We might want to do the same.
return static_cast<void (B2::*)()>(mp);
// FIXME: We should return i8* instead of i32 here. The ptrtoint cast prevents
// LLVM from optimizing away the branch. This is likely a bug in
// lib/CodeGen/TargetInfo.cpp with how we classify memptr types for returns.
//
// CHECK: define i32 @"\01?convertMultipleFuncToB2@@YAP8B2@@AEXXZP8Multiple@@AEXXZ@Z"{{.*}} {
// CHECK: store
// CHECK: %[[src:.*]] = load { i8*, i32 }* %{{.*}}, align 8
// CHECK: extractvalue { i8*, i32 } %[[src]], 0
// CHECK: icmp ne i8* %{{.*}}, null
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
//
// memptr.convert: ; preds = %entry
// CHECK: %[[fp:.*]] = extractvalue { i8*, i32 } %[[src]], 0
// CHECK: br label
//
// memptr.converted: ; preds = %memptr.convert, %entry
// CHECK: phi i8* [ null, %{{.*}} ], [ %[[fp]], %{{.*}} ]
// CHECK: }
}
namespace Test1 {
struct A { int a; };
struct B { int b; };
struct C : virtual A { int c; };
struct D : B, C { int d; };
void (D::*convertCToD(void (C::*mp)()))() {
return mp;
// CHECK: define void @"\01?convertCToD@Test1@@YAP8D@1@AEXXZP8C@1@AEXXZ@Z"{{.*}} {
// CHECK: store
// CHECK: load { i8*, i32, i32 }* %{{.*}}, align 8
// CHECK: extractvalue { i8*, i32, i32 } %{{.*}}, 0
// CHECK: icmp ne i8* %{{.*}}, null
// CHECK: br i1 %{{.*}}, label %{{.*}}, label %{{.*}}
//
// memptr.convert: ; preds = %entry
// CHECK: extractvalue { i8*, i32, i32 } %{{.*}}, 0
// CHECK: extractvalue { i8*, i32, i32 } %{{.*}}, 1
// CHECK: extractvalue { i8*, i32, i32 } %{{.*}}, 2
// CHECK: %[[adj:.*]] = add nsw i32 %{{.*}}, 4
// CHECK: insertvalue { i8*, i32, i32 } undef, i8* {{.*}}, 0
// CHECK: insertvalue { i8*, i32, i32 } {{.*}}, i32 %[[adj]], 1
// CHECK: insertvalue { i8*, i32, i32 } {{.*}}, i32 {{.*}}, 2
// CHECK: br label
//
// memptr.converted: ; preds = %memptr.convert, %entry
// CHECK: phi { i8*, i32, i32 } [ { i8* null, i32 0, i32 -1 }, {{.*}} ], [ {{.*}} ]
// CHECK: }
}
}
namespace Test2 {
// Test that we dynamically convert between different null reps.
struct A { int a; };
struct B : A { int b; };
struct C : A {
int c;
virtual void hasVfPtr();
};
int A::*reinterpret(int B::*mp) {
return reinterpret_cast<int A::*>(mp);
// CHECK: define i32 @"\01?reinterpret@Test2@@YAPQA@1@HPQB@1@H@Z"{{.*}} {
// CHECK-NOT: select
// CHECK: ret i32
// CHECK: }
}
int A::*reinterpret(int C::*mp) {
return reinterpret_cast<int A::*>(mp);
// CHECK: define i32 @"\01?reinterpret@Test2@@YAPQA@1@HPQC@1@H@Z"{{.*}} {
// CHECK: %[[mp:.*]] = load i32*
// CHECK: %[[cmp:.*]] = icmp ne i32 %[[mp]], 0
// CHECK: select i1 %[[cmp]], i32 %[[mp]], i32 -1
// CHECK: }
}
}
namespace Test3 {
// Make sure we cast 'this' to i8* before using GEP.
struct A {
int a;
int b;
};
int *load_data(A *a, int A::*mp) {
return &(a->*mp);
// CHECK-LABEL: define i32* @"\01?load_data@Test3@@YAPAHPAUA@1@PQ21@H@Z"{{.*}} {
// CHECK: %[[a:.*]] = load %"struct.Test3::A"** %{{.*}}, align 4
// CHECK: %[[mp:.*]] = load i32* %{{.*}}, align 4
// CHECK: %[[a_i8:.*]] = bitcast %"struct.Test3::A"* %[[a]] to i8*
// CHECK: getelementptr inbounds i8* %[[a_i8]], i32 %[[mp]]
// CHECK: }
}
}
namespace Test4 {
struct A { virtual void f(); };
struct B { virtual void g(); };
struct C : A, B { virtual void g(); };
void (C::*getmp())() {
return &C::g;
}
// CHECK-LABEL: define i64 @"\01?getmp@Test4@@YAP8C@1@AEXXZXZ"()
// CHECK: store { i8*, i32 } { i8* bitcast (void (%"struct.Test4::C"*, ...)* @"\01??_9C@Test4@@$BA@AE" to i8*), i32 4 }, { i8*, i32 }* %{{.*}}
//
// CHECK-LABEL: define linkonce_odr x86_thiscallcc void @"\01??_9C@Test4@@$BA@AE"(%"struct.Test4::C"* %this, ...)
// CHECK-NOT: getelementptr
// CHECK: load void (%"struct.Test4::C"*, ...)*** %{{.*}}
// CHECK: getelementptr inbounds void (%"struct.Test4::C"*, ...)** %{{.*}}, i64 0
// CHECK-NOT: getelementptr
// CHECK: musttail call x86_thiscallcc void (%"struct.Test4::C"*, ...)* %
}
namespace pr20007 {
struct A {
void f();
void f(int);
};
struct B : public A {};
void test() { void (B::*a)() = &B::f; }
// CHECK-LABEL: define void @"\01?test@pr20007@@YAXXZ"
// CHECK: store i8* bitcast (void (%"struct.pr20007::A"*)* @"\01?f@A@pr20007@@QAEXXZ" to i8*)
}
namespace pr20007_kw {
struct A {
void f();
void f(int);
};
struct __single_inheritance B;
struct B : public A {};
void test() { void (B::*a)() = &B::f; }
// CHECK-LABEL: define void @"\01?test@pr20007_kw@@YAXXZ"
// CHECK: store i8* bitcast (void (%"struct.pr20007_kw::A"*)* @"\01?f@A@pr20007_kw@@QAEXXZ" to i8*)
}
namespace pr20007_pragma {
struct A {
void f();
void f(int);
};
struct B : public A {};
void test() { (void)(void (B::*)()) &B::f; }
#pragma pointers_to_members(full_generality, virtual_inheritance)
static_assert(sizeof(int B::*) == 4, "");
static_assert(sizeof(int A::*) == 4, "");
#pragma pointers_to_members(best_case)
// CHECK-LABEL: define void @"\01?test@pr20007_pragma@@YAXXZ"
}
namespace pr20007_pragma2 {
struct A {
};
struct B : public A {
void f();
};
void test() { (void)&B::f; }
#pragma pointers_to_members(full_generality, virtual_inheritance)
static_assert(sizeof(int B::*) == 4, "");
static_assert(sizeof(int A::*) == 12, "");
#pragma pointers_to_members(best_case)
// CHECK-LABEL: define void @"\01?test@pr20007_pragma2@@YAXXZ"
}
namespace pr19987 {
template <typename T>
struct S {
int T::*x;
};
struct U : S<U> {};
static_assert(sizeof(S<U>::x) == 12, "");
}
#else
struct __virtual_inheritance A;
#ifdef MEMFUN
int foo(A *a, int (A::*mp)()) {
return (a->*mp)(); // expected-error{{requires a complete class type}}
}
#else
int foo(A *a, int A::*mp) {
return a->*mp; // expected-error{{requires a complete class type}}
}
#endif
#endif
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