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