54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
|
// RUN: %clang_cc1 -fno-rtti -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 | FileCheck %s
|
||
|
|
// RUN: %clang_cc1 -fno-rtti -emit-llvm %s -o - -mconstructor-aliases -triple=i386-pc-win32 -fno-delete-null-pointer-checks | FileCheck %s
|
||
|
|
|
||
|
|
struct Left {
|
||
|
|
virtual void left();
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Right {
|
||
|
|
virtual void right();
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ChildNoOverride : Left, Right {
|
||
|
|
};
|
||
|
|
|
||
|
|
struct ChildOverride : Left, Right {
|
||
|
|
virtual void left();
|
||
|
|
virtual void right();
|
||
|
|
};
|
||
|
|
|
||
|
|
extern "C" void foo(void *);
|
||
|
|
|
||
|
|
void call_left_no_override(ChildNoOverride *child) {
|
||
|
|
// CHECK: %[[CHILD:.*]] = load %struct.ChildNoOverride
|
||
|
|
child->left();
|
||
|
|
}
|
||
|
|
|
||
|
|
void ChildOverride::left() {}
|
||
|
|
|
||
|
|
void call_right_no_override(ChildNoOverride *child) {
|
||
|
|
child->right();
|
||
|
|
// When calling a right base's virtual method, one needs to adjust `this` at the caller site.
|
||
|
|
//
|
||
|
|
// CHECK: %[[CHILD_i8:.*]] = bitcast %struct.ChildNoOverride* %[[CHILD]] to i8*
|
||
|
|
// CHECK: %[[RIGHT_i8:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4
|
||
|
|
// CHECK: %[[RIGHT:.*]] = bitcast i8* %[[RIGHT_i8]] to %struct.Right*
|
||
|
|
//
|
||
|
|
// CHECK: %[[VFPTR:.*]] = bitcast %struct.Right* %[[RIGHT]] to void (%struct.Right*)***
|
||
|
|
// CHECK: %[[VFTABLE:.*]] = load void (%struct.Right*)**, void (%struct.Right*)*** %[[VFPTR]]
|
||
|
|
// CHECK: %[[VFUN:.*]] = getelementptr inbounds void (%struct.Right*)*, void (%struct.Right*)** %[[VFTABLE]], i64 0
|
||
|
|
}
|
||
|
|
|
||
|
|
void ChildOverride::right() {
|
||
|
|
foo(this);
|
||
|
|
}
|
||
|
|
|
||
|
|
void call_right_override(ChildOverride *child) {
|
||
|
|
child->right();
|
||
|
|
// Ensure that `nonnull` and `dereferenceable(N)` are not emitted whether or not null is valid
|
||
|
|
//
|
||
|
|
// CHECK: %[[RIGHT:.*]] = getelementptr inbounds i8, i8* %[[CHILD_i8]], i32 4
|
||
|
|
// CHECK: %[[VFUN_VALUE:.*]] = load void (i8*)*, void (i8*)** %[[VFUN]]
|
||
|
|
// CHECK: call x86_thiscallcc void %[[VFUN_VALUE]](i8* %[[RIGHT]])
|
||
|
|
}
|