1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s 2 3 // C++-specific tests for __builtin_object_size 4 5 int gi; 6 7 // CHECK-LABEL: define void @_Z5test1v() test1()8 void test1() { 9 // Guaranteeing that our cast removal logic doesn't break more interesting 10 // cases. 11 struct A { int a; }; 12 struct B { int b; }; 13 struct C: public A, public B {}; 14 15 C c; 16 17 // CHECK: store i32 8 18 gi = __builtin_object_size(&c, 0); 19 // CHECK: store i32 8 20 gi = __builtin_object_size((A*)&c, 0); 21 // CHECK: store i32 4 22 gi = __builtin_object_size((B*)&c, 0); 23 24 // CHECK: store i32 8 25 gi = __builtin_object_size((char*)&c, 0); 26 // CHECK: store i32 8 27 gi = __builtin_object_size((char*)(A*)&c, 0); 28 // CHECK: store i32 4 29 gi = __builtin_object_size((char*)(B*)&c, 0); 30 } 31 32 // CHECK-LABEL: define void @_Z5test2v() test2()33 void test2() { 34 struct A { char buf[16]; }; 35 struct B : A {}; 36 struct C { int i; B bs[1]; } *c; 37 38 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false) 39 gi = __builtin_object_size(&c->bs[0], 0); 40 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false) 41 gi = __builtin_object_size(&c->bs[0], 1); 42 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true) 43 gi = __builtin_object_size(&c->bs[0], 2); 44 // CHECK: store i32 16 45 gi = __builtin_object_size(&c->bs[0], 3); 46 47 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false) 48 gi = __builtin_object_size((A*)&c->bs[0], 0); 49 // CHECK: store i32 16 50 gi = __builtin_object_size((A*)&c->bs[0], 1); 51 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true) 52 gi = __builtin_object_size((A*)&c->bs[0], 2); 53 // CHECK: store i32 16 54 gi = __builtin_object_size((A*)&c->bs[0], 3); 55 56 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false) 57 gi = __builtin_object_size(&c->bs[0].buf[0], 0); 58 // CHECK: store i32 16 59 gi = __builtin_object_size(&c->bs[0].buf[0], 1); 60 // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true) 61 gi = __builtin_object_size(&c->bs[0].buf[0], 2); 62 // CHECK: store i32 16 63 gi = __builtin_object_size(&c->bs[0].buf[0], 3); 64 } 65