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llvm-project/clang/test/CodeGenCXX/microsoft-no-rtti-data.cpp

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Driver: Handle /GR- in a compatible way with MSVC There are slight differences between /GR- and -fno-rtti which made mapping one to the other inappropriate. -fno-rtti disables dynamic_cast, typeid, and does not emit RTTI related information for the v-table. /GR- does not generate complete object locators and thus will not reference them in vftables. However, constructs like dynamic_cast and typeid are permitted. This should bring our implementation of RTTI up to semantic parity with MSVC modulo bugs. llvm-svn: 212138
2014-07-02 06:24:56 +08:00
// RUN: %clang_cc1 %s -fno-rtti-data -triple=i386-pc-win32 -o - -emit-llvm | FileCheck %s
// vftable shouldn't have RTTI data in it.
MS ABI: -fno-rtti-data wasn't data-free enough While -fno-rtti-data would correctly avoid referencing the RTTI complete object locator in the VFTable itself, it would emit them anyway. llvm-svn: 213841
2014-07-24 14:09:19 +08:00
// CHECK-NOT: @"\01??_R4S@@6B@"
Also put vtables in a comdat when rtti is disabled. llvm-svn: 226325
2015-01-17 05:41:44 +08:00
// CHECK: @"\01??_7S@@6B@" = linkonce_odr unnamed_addr constant [1 x i8*] [i8* bitcast ({{.*}} @"\01??_GS@@UAEPAXI@Z" to i8*)], comdat
Driver: Handle /GR- in a compatible way with MSVC There are slight differences between /GR- and -fno-rtti which made mapping one to the other inappropriate. -fno-rtti disables dynamic_cast, typeid, and does not emit RTTI related information for the v-table. /GR- does not generate complete object locators and thus will not reference them in vftables. However, constructs like dynamic_cast and typeid are permitted. This should bring our implementation of RTTI up to semantic parity with MSVC modulo bugs. llvm-svn: 212138
2014-07-02 06:24:56 +08:00
struct type_info;
namespace std { using ::type_info; }
struct S {
virtual ~S();
} s;
struct U : S {
virtual ~U();
};
extern S *getS();
const std::type_info &ti = typeid(*getS());
const U &u = dynamic_cast<U &>(*getS());
clang/test/CodeGenCXX/microsoft-no-rtti-data.cpp: Relax an expression for -Asserts. llvm-svn: 212144
2014-07-02 07:33:03 +08:00
// CHECK: call i8* @__RTDynamicCast(i8* %{{.+}}, i32 0, i8* bitcast ({{.*}} @"\01??_R0?AUS@@@8" to i8*), i8* bitcast ({{.*}} @"\01??_R0?AUU@@@8" to i8*), i32 1)