44 lines · cpp
1// Cross comdat example2// Parent VTable is in a comdat section.3 4// RUN: %clang_cc1 %s -triple=aarch64-unknown-fuchsia -O1 -o - -emit-llvm -fhalf-no-semantic-interposition | FileCheck %s5 6// The inline function is emitted in each module with the same comdat7// CHECK: $_ZTI1A = comdat any8// CHECK: $_ZTS1A = comdat any9// CHECK: $_ZTI1B.rtti_proxy = comdat any10 11// The VTable is emitted everywhere used12// CHECK: $_ZTV1A = comdat any13// CHECK: $_ZTI1A.rtti_proxy = comdat any14 15// The VTable for B is emitted here since it has a key function which is defined in this module16// CHECK: @_ZTV1B.local = internal unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1B.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1B3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1B.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, align 417 18// The VTable for A is emitted here and in a comdat section since it has no key function, and is used in this module when creating an instance of A (in func()).19// CHECK: @_ZTV1A.local = linkonce_odr hidden unnamed_addr constant { [3 x i32] } { [3 x i32] [i32 0, i32 trunc (i64 sub (i64 ptrtoint (ptr @_ZTI1A.rtti_proxy to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint (ptr dso_local_equivalent @_ZN1A3fooEv to i64), i64 ptrtoint (ptr getelementptr inbounds ({ [3 x i32] }, ptr @_ZTV1A.local, i32 0, i32 0, i32 2) to i64)) to i32)] }, comdat($_ZTV1A), align 420 21// CHECK: @_ZTV1B ={{.*}} unnamed_addr alias { [3 x i32] }, ptr @_ZTV1B.local22// CHECK: @_ZTV1A = linkonce_odr unnamed_addr alias { [3 x i32] }, ptr @_ZTV1A.local23 24// CHECK: define{{.*}} void @_ZN1B3fooEv(ptr {{.*}}%this) unnamed_addr25// CHECK-NEXT: entry:26// CHECK-NEXT: ret void27// CHECK-NEXT: }28 29class A {30public:31 inline virtual void foo() {}32};33class B : public A {34public:35 void foo() override;36};37void A_foo(A *a);38 39void B::foo() {}40void func2() {41 A a;42 A_foo(&a);43}44