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// 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 inalloca [[argmem_ty:<{ %struct.A, %struct.A }>]]
// 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: }
}
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