eb46c95c3e
Changes the default Windows target triple returned by GetHostTriple.cmake from the old environment names (which we wanted to move away from) to newer, normalized ones. This also requires updating all tests to use the new systems names in constraints. Differential Revision: https://reviews.llvm.org/D47381 llvm-svn: 339307
61 lines
1.2 KiB
C++
61 lines
1.2 KiB
C++
// RUN: %clangxx_cfi_diag -o %t %s
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// RUN: %run %t 2>&1 | FileCheck %s
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// This test checks that we don't generate two type checks,
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// if two virtual calls are in the same function.
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// UNSUPPORTED: windows-msvc
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// REQUIRES: cxxabi
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// TODO(krasin): implement the optimization to not emit two type checks.
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// XFAIL: *
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#include <stdio.h>
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class Base {
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public:
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virtual void Foo() {
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fprintf(stderr, "Base::Foo\n");
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}
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virtual void Bar() {
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fprintf(stderr, "Base::Bar\n");
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}
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};
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class Derived : public Base {
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public:
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void Foo() override {
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fprintf(stderr, "Derived::Foo\n");
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}
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void Bar() override {
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printf("Derived::Bar\n");
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}
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};
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__attribute__((noinline)) void print(Base* ptr) {
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ptr->Foo();
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// Corrupt the vtable pointer. We expect that the optimization will
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// check vtable before the first vcall then store it in a local
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// variable, and reuse it for the second vcall. With no optimization,
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// CFI will complain about the virtual table being corrupted.
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*reinterpret_cast<void**>(ptr) = 0;
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ptr->Bar();
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}
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int main() {
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Base b;
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Derived d;
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// CHECK: Base::Foo
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// CHECK: Base::Bar
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print(&b);
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// CHECK: Derived::Foo
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// CHECK-NOT: runtime error
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// CHECK: Derived::Bar
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print(&d);
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return 0;
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}
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