forked from OSchip/llvm-project
171 lines
6.2 KiB
C++
171 lines
6.2 KiB
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fexceptions -fno-rtti | FileCheck -check-prefix WIN32 %s
|
|
|
|
struct A {
|
|
A();
|
|
~A();
|
|
int a;
|
|
};
|
|
|
|
A getA();
|
|
|
|
int TakesTwo(A a, A b);
|
|
void HasEHCleanup() {
|
|
TakesTwo(getA(), getA());
|
|
}
|
|
|
|
// With exceptions, we need to clean up at least one of these temporaries.
|
|
// WIN32-LABEL: define void @"\01?HasEHCleanup@@YAXXZ"() {{.*}} {
|
|
// WIN32: %[[base:.*]] = call i8* @llvm.stacksave()
|
|
// If this call throws, we have to restore the stack.
|
|
// WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
|
|
// If this call throws, we have to cleanup the first temporary.
|
|
// WIN32: invoke void @"\01?getA@@YA?AUA@@XZ"(%struct.A* sret %{{.*}})
|
|
// If this call throws, we have to cleanup the stacksave.
|
|
// WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
|
|
// WIN32: call void @llvm.stackrestore(i8* %[[base]])
|
|
// WIN32: ret void
|
|
//
|
|
// There should be one dtor call for unwinding from the second getA.
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32-NOT: @"\01??1A@@QAE@XZ"
|
|
// WIN32: call void @llvm.stackrestore
|
|
// WIN32: }
|
|
|
|
void TakeRef(const A &a);
|
|
int HasDeactivatedCleanups() {
|
|
return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A()));
|
|
}
|
|
|
|
// WIN32-LABEL: define i32 @"\01?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
|
|
// WIN32: %[[isactive:.*]] = alloca i1
|
|
// WIN32: call i8* @llvm.stacksave()
|
|
// WIN32: %[[argmem:.*]] = alloca [[argmem_ty:<{ %struct.A, %struct.A }>]], inalloca
|
|
// WIN32: %[[arg1:.*]] = getelementptr inbounds [[argmem_ty]]* %[[argmem]], i32 0, i32 1
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
|
|
//
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %[[arg1]])
|
|
// WIN32: store i1 true, i1* %[[isactive]]
|
|
//
|
|
// WIN32: %[[arg0:.*]] = getelementptr inbounds [[argmem_ty]]* %[[argmem]], i32 0, i32 0
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: store i1 false, i1* %[[isactive]]
|
|
//
|
|
// WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"([[argmem_ty]]* inalloca %[[argmem]])
|
|
// WIN32: call void @llvm.stackrestore
|
|
// Destroy the two const ref temporaries.
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: ret i32
|
|
//
|
|
// Conditionally destroy arg1.
|
|
// WIN32: %[[cond:.*]] = load i1* %[[isactive]]
|
|
// WIN32: br i1 %[[cond]]
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"(%struct.A* %[[arg1]])
|
|
// WIN32: }
|
|
|
|
// Test putting the cleanups inside a conditional.
|
|
int CouldThrow();
|
|
int HasConditionalCleanup(bool cond) {
|
|
return (cond ? TakesTwo(A(), A()) : CouldThrow());
|
|
}
|
|
|
|
// WIN32-LABEL: define i32 @"\01?HasConditionalCleanup@@YAH_N@Z"(i1 zeroext %{{.*}}) {{.*}} {
|
|
// WIN32: store i1 false
|
|
// WIN32: br i1
|
|
// WIN32: call i8* @llvm.stacksave()
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
|
|
// WIN32: store i1 true
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"(%struct.A* %{{.*}})
|
|
// WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
|
|
// WIN32: call void @llvm.stackrestore
|
|
//
|
|
// WIN32: call i32 @"\01?CouldThrow@@YAHXZ"()
|
|
//
|
|
// Only one dtor in the invoke for arg1
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"({{.*}})
|
|
// WIN32-NOT: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: call void @llvm.stackrestore
|
|
// WIN32: }
|
|
|
|
// Now test both.
|
|
int HasConditionalDeactivatedCleanups(bool cond) {
|
|
return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow());
|
|
}
|
|
|
|
// WIN32-LABEL: define i32 @"\01?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
|
|
// WIN32: alloca i1
|
|
// WIN32: %[[arg1_cond:.*]] = alloca i1
|
|
// Start all four cleanups as deactivated.
|
|
// WIN32: store i1 false
|
|
// WIN32: store i1 false
|
|
// WIN32: store i1 false
|
|
// WIN32: store i1 false
|
|
// WIN32: br i1
|
|
// True condition.
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: store i1 true
|
|
// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: store i1 true, i1* %[[arg1_cond]]
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: store i1 true
|
|
// WIN32: invoke void @"\01?TakeRef@@YAXABUA@@@Z"
|
|
// WIN32: invoke x86_thiscallcc %struct.A* @"\01??0A@@QAE@XZ"
|
|
// WIN32: store i1 true
|
|
// WIN32: store i1 false, i1* %[[arg1_cond]]
|
|
// WIN32: invoke i32 @"\01?TakesTwo@@YAHUA@@0@Z"
|
|
// False condition.
|
|
// WIN32: invoke i32 @"\01?CouldThrow@@YAHXZ"()
|
|
// Two normal cleanups for TakeRef args.
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: ret i32
|
|
//
|
|
// Somewhere in the landing pad soup, we conditionally destroy arg1.
|
|
// WIN32: %[[isactive:.*]] = load i1* %[[arg1_cond]]
|
|
// WIN32: br i1 %[[isactive]]
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@@QAE@XZ"
|
|
// WIN32: }
|
|
|
|
namespace crash_on_partial_destroy {
|
|
struct A {
|
|
virtual ~A();
|
|
};
|
|
|
|
struct B : virtual A {
|
|
// Has an implicit destructor.
|
|
};
|
|
|
|
struct C : B {
|
|
C();
|
|
};
|
|
|
|
void foo();
|
|
// We used to crash when emitting this.
|
|
C::C() { foo(); }
|
|
|
|
// Verify that we don't bother with a vbtable lookup when adjusting the this
|
|
// pointer to call a base destructor from a constructor while unwinding.
|
|
// WIN32-LABEL: define {{.*}} @"\01??0C@crash_on_partial_destroy@@QAE@XZ"{{.*}} {
|
|
// WIN32: landingpad
|
|
//
|
|
// We shouldn't do any vbptr loads, just constant GEPs.
|
|
// WIN32-NOT: load
|
|
// WIN32: getelementptr i8* %{{.*}}, i32 4
|
|
// WIN32-NOT: load
|
|
// WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::B"*
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1B@crash_on_partial_destroy@@UAE@XZ"
|
|
//
|
|
// WIN32-NOT: load
|
|
// WIN32: bitcast %"struct.crash_on_partial_destroy::C"* %{{.*}} to i8*
|
|
// WIN32-NOT: load
|
|
// WIN32: getelementptr inbounds i8* %{{.*}}, i64 4
|
|
// WIN32-NOT: load
|
|
// WIN32: bitcast i8* %{{.*}} to %"struct.crash_on_partial_destroy::A"*
|
|
// WIN32: invoke x86_thiscallcc void @"\01??1A@crash_on_partial_destroy@@UAE@XZ"
|
|
// WIN32: }
|
|
}
|