vendor/clang/clang-trunk-r256633

1 files changed, 64 insertions, 0 deletions

diff --git a/test/CodeGen/object-size.cpp b/test/CodeGen/object-size.cpp
new file mode 100644
index 000000000000..81b44a55a4e3
--- /dev/null
+++ b/test/CodeGen/object-size.cpp
@@ -0,0 +1,64 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
+
+// C++-specific tests for __builtin_object_size
+
+int gi;
+
+// CHECK-LABEL: define void @_Z5test1v()
+void test1() {
+  // Guaranteeing that our cast removal logic doesn't break more interesting
+  // cases.
+  struct A { int a; };
+  struct B { int b; };
+  struct C: public A, public B {};
+
+  C c;
+
+  // CHECK: store i32 8
+  gi = __builtin_object_size(&c, 0);
+  // CHECK: store i32 8
+  gi = __builtin_object_size((A*)&c, 0);
+  // CHECK: store i32 4
+  gi = __builtin_object_size((B*)&c, 0);
+
+  // CHECK: store i32 8
+  gi = __builtin_object_size((char*)&c, 0);
+  // CHECK: store i32 8
+  gi = __builtin_object_size((char*)(A*)&c, 0);
+  // CHECK: store i32 4
+  gi = __builtin_object_size((char*)(B*)&c, 0);
+}
+
+// CHECK-LABEL: define void @_Z5test2v()
+void test2() {
+  struct A { char buf[16]; };
+  struct B : A {};
+  struct C { int i; B bs[1]; } *c;
+
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false)
+  gi = __builtin_object_size(&c->bs[0], 0);
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false)
+  gi = __builtin_object_size(&c->bs[0], 1);
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true)
+  gi = __builtin_object_size(&c->bs[0], 2);
+  // CHECK: store i32 16
+  gi = __builtin_object_size(&c->bs[0], 3);
+
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false)
+  gi = __builtin_object_size((A*)&c->bs[0], 0);
+  // CHECK: store i32 16
+  gi = __builtin_object_size((A*)&c->bs[0], 1);
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true)
+  gi = __builtin_object_size((A*)&c->bs[0], 2);
+  // CHECK: store i32 16
+  gi = __builtin_object_size((A*)&c->bs[0], 3);
+
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 false)
+  gi = __builtin_object_size(&c->bs[0].buf[0], 0);
+  // CHECK: store i32 16
+  gi = __builtin_object_size(&c->bs[0].buf[0], 1);
+  // CHECK: call i64 @llvm.objectsize.i64.p0i8(i8* %{{.*}}, i1 true)
+  gi = __builtin_object_size(&c->bs[0].buf[0], 2);
+  // CHECK: store i32 16
+  gi = __builtin_object_size(&c->bs[0].buf[0], 3);
+}