// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fexceptions -fcxx-exceptions -fno-rtti | FileCheck -check-prefix WIN32 -check-prefix WIN32-O0 %s
// RUN: %clang_cc1 -std=c++11 -emit-llvm -O3 -disable-llvm-passes %s -o - -triple=i386-pc-win32 -mconstructor-aliases -fexceptions -fcxx-exceptions -fno-rtti | FileCheck -check-prefix WIN32 -check-prefix WIN32-O3 -check-prefix WIN32-LIFETIME %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 dso_local void @"?HasEHCleanup@@YAXXZ"() {{.*}} {
// WIN32: %[[base:.*]] = call ptr @llvm.stacksave.p0()
// If this call throws, we have to restore the stack.
// WIN32: call void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
// If this call throws, we have to cleanup the first temporary.
// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
// If this call throws, we have to cleanup the stacksave.
// WIN32: call noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
// WIN32: call void @llvm.stackrestore
// WIN32: ret void
//
// There should be one dtor call for unwinding from the second getA.
// WIN32: cleanuppad
// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-NOT: @"??1A@@QAE@XZ"
// WIN32: }
// This test verifies the fix for a crash that occurred after
// fa87fa97fb79.
void HasEHCleanupNoexcept() noexcept {
TakesTwo(getA(), getA());
}
// With exceptions, we need to clean up at least one of these temporaries.
// WIN32-LABEL: define dso_local void @"?HasEHCleanupNoexcept@@YAXXZ"() {{.*}} {
// WIN32: %[[base:.*]] = call ptr @llvm.stacksave.p0()
// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
// WIN32: invoke void @"?getA@@YA?AUA@@XZ"(ptr dead_on_unwind writable sret(%struct.A) align 4 %{{.*}})
// WIN32: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
// WIN32: call void @llvm.stackrestore
// WIN32: ret void
//
// Since all the calls terminate, there should be no dtors on the unwind
// WIN32: cleanuppad
// WIN32-NOT: @"??1A@@QAE@XZ"
// WIN32: }
void TakeRef(const A &a);
int HasDeactivatedCleanups() {
return TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A()));
}
// WIN32-LABEL: define dso_local noundef i32 @"?HasDeactivatedCleanups@@YAHXZ"() {{.*}} {
// WIN32: %[[isactive:.*]] = alloca i1
// WIN32: call ptr @llvm.stacksave.p0()
// WIN32: %[[argmem:.*]] = alloca inalloca [[argmem_ty:<{ %struct.A, %struct.A }>]]
// WIN32: %[[arg1:.*]] = getelementptr inbounds nuw [[argmem_ty]], ptr %[[argmem]], i32 0, i32 1
// WIN32: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32: invoke void @"?TakeRef@@YAXABUA@@@Z"
//
// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %[[arg1]])
// WIN32: store i1 true, ptr %[[isactive]]
//
// WIN32: %[[arg0:.*]] = getelementptr inbounds nuw [[argmem_ty]], ptr %[[argmem]], i32 0, i32 0
// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32: invoke void @"?TakeRef@@YAXABUA@@@Z"
// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32: store i1 false, ptr %[[isactive]]
//
// WIN32: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"(ptr inalloca([[argmem_ty]]) %[[argmem]])
// Destroy the two const ref temporaries.
// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32: ret i32
//
// Conditionally destroy arg1.
// WIN32: %[[cond:.*]] = load i1, ptr %[[isactive]]
// WIN32: br i1 %[[cond]]
// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"(ptr {{[^,]*}} %[[arg1]])
// WIN32: }
// Test putting the cleanups inside a conditional.
int CouldThrow();
int HasConditionalCleanup(bool cond) {
return (cond ? TakesTwo(A(), A()) : CouldThrow());
}
// WIN32-LABEL: define dso_local noundef i32 @"?HasConditionalCleanup@@YAH_N@Z"(i1 noundef zeroext %{{.*}}) {{.*}} {
// WIN32: store i1 false
// WIN32: br i1
// WIN32: call ptr @llvm.stacksave.p0()
// WIN32: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
// WIN32: store i1 true
// WIN32: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
// WIN32: call noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
//
// WIN32: call void @llvm.stackrestore
//
// WIN32: call noundef i32 @"?CouldThrow@@YAHXZ"()
//
// Only one dtor in the invoke for arg1
// WIN32: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
// WIN32: }
// Now test both.
int HasConditionalDeactivatedCleanups(bool cond) {
return (cond ? TakesTwo((TakeRef(A()), A()), (TakeRef(A()), A())) : CouldThrow());
}
// WIN32-O0-LABEL: define dso_local noundef i32 @"?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
// WIN32-O0: alloca i1
// WIN32-O0: %[[arg1_cond:.*]] = alloca i1
// Start all four cleanups as deactivated.
// WIN32-O0: store i1 false
// WIN32-O0: store i1 false
// WIN32-O0: store i1 false
// WIN32-O0: store i1 false
// WIN32-O0: br i1
// True condition.
// WIN32-O0: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O0: store i1 true
// WIN32-O0: invoke void @"?TakeRef@@YAXABUA@@@Z"
// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O0: store i1 true, ptr %[[arg1_cond]]
// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O0: store i1 true
// WIN32-O0: invoke void @"?TakeRef@@YAXABUA@@@Z"
// WIN32-O0: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O0: store i1 true
// WIN32-O0: store i1 false, ptr %[[arg1_cond]]
// WIN32-O0: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
// False condition.
// WIN32-O0: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
// Two normal cleanups for TakeRef args.
// WIN32-O0: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-O0-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
// WIN32-O0: ret i32
//
// Somewhere in the landing pad soup, we conditionally destroy arg1.
// WIN32-O0: %[[isactive:.*]] = load i1, ptr %[[arg1_cond]]
// WIN32-O0: br i1 %[[isactive]]
// WIN32-O0: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-O0: }
// WIN32-O3-LABEL: define dso_local noundef i32 @"?HasConditionalDeactivatedCleanups@@YAH_N@Z"{{.*}} {
// WIN32-O3: alloca i1
// WIN32-O3: alloca i1
// WIN32-O3: %[[arg1_cond:.*]] = alloca i1
// Start all four cleanups as deactivated.
// WIN32-O3: store i1 false
// WIN32-O3: store i1 false
// WIN32-O3: store i1 false
// WIN32-O3: store i1 false
// WIN32-O3: store i1 false
// WIN32-O3: store i1 false
// WIN32-O3: br i1
// True condition.
// WIN32-O3: call x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O3: store i1 true
// WIN32-O3: invoke void @"?TakeRef@@YAXABUA@@@Z"
// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O3: store i1 true, ptr %[[arg1_cond]]
// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O3: store i1 true
// WIN32-O3: invoke void @"?TakeRef@@YAXABUA@@@Z"
// WIN32-O3: invoke x86_thiscallcc noundef ptr @"??0A@@QAE@XZ"
// WIN32-O3: store i1 true
// WIN32-O3: store i1 false, ptr %[[arg1_cond]]
// WIN32-O3: invoke noundef i32 @"?TakesTwo@@YAHUA@@0@Z"
// False condition.
// WIN32-O3: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
// Two normal cleanups for TakeRef args.
// WIN32-O3: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-O3-NOT: invoke x86_thiscallcc void @"??1A@@QAE@XZ"
// WIN32-O3: ret i32
//
// Somewhere in the landing pad soup, we conditionally destroy arg1.
// WIN32-O3: %[[isactive:.*]] = load i1, ptr %[[arg1_cond]]
// WIN32-O3: br i1 %[[isactive]]
// WIN32-O3: call x86_thiscallcc void @"??1A@@QAE@XZ"({{.*}})
// WIN32-O3: }
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 dso_local {{.*}} @"??0C@crash_on_partial_destroy@@QAE@XZ"{{.*}} {
// WIN32: cleanuppad
//
// We shouldn't do any vbptr loads, just constant GEPs.
// WIN32-NOT: load
// WIN32: getelementptr i8, ptr %{{.*}}, i32 4
// WIN32-NOT: load
// WIN32: call x86_thiscallcc void @"??1B@crash_on_partial_destroy@@UAE@XZ"
//
// WIN32-NOT: load
// WIN32-NOT: load
// WIN32: getelementptr inbounds i8, ptr %{{.*}}, i32 4
// WIN32-NOT: load
// WIN32: call x86_thiscallcc void @"??1A@crash_on_partial_destroy@@UAE@XZ"({{.*}})
// WIN32: }
}
namespace dont_call_terminate {
struct C {
~C();
};
void g();
void f() {
C c;
g();
}
// WIN32-LABEL: define dso_local void @"?f@dont_call_terminate@@YAXXZ"()
// WIN32: invoke void @"?g@dont_call_terminate@@YAXXZ"()
// WIN32-NEXT: to label %[[cont:[^ ]*]] unwind label %[[lpad:[^ ]*]]
//
// WIN32: [[cont]]
// WIN32: call x86_thiscallcc void @"??1C@dont_call_terminate@@QAE@XZ"({{.*}})
//
// WIN32: [[lpad]]
// WIN32-NEXT: cleanuppad
// WIN32: call x86_thiscallcc void @"??1C@dont_call_terminate@@QAE@XZ"({{.*}})
}
namespace noexcept_false_dtor {
struct D {
~D() noexcept(false);
};
void f() {
D d;
CouldThrow();
}
}
// WIN32-LABEL: define dso_local void @"?f@noexcept_false_dtor@@YAXXZ"()
// WIN32: invoke noundef i32 @"?CouldThrow@@YAHXZ"()
// WIN32: call x86_thiscallcc void @"??1D@noexcept_false_dtor@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
// WIN32: cleanuppad
// WIN32: call x86_thiscallcc void @"??1D@noexcept_false_dtor@@QAE@XZ"(ptr {{[^,]*}} %{{.*}})
// WIN32: cleanupret
namespace lifetime_marker {
struct C {
~C();
};
void g();
void f() {
C c;
g();
}
// WIN32-LIFETIME-LABEL: define dso_local void @"?f@lifetime_marker@@YAXXZ"()
// WIN32-LIFETIME: %[[c:.*]] = alloca %"struct.lifetime_marker::C"
// WIN32-LIFETIME: call void @llvm.lifetime.start.p0(i64 1, ptr %c)
// WIN32-LIFETIME: invoke void @"?g@lifetime_marker@@YAXXZ"()
// WIN32-LIFETIME-NEXT: to label %[[cont:[^ ]*]] unwind label %[[lpad0:[^ ]*]]
//
// WIN32-LIFETIME: [[cont]]
// WIN32-LIFETIME: call x86_thiscallcc void @"??1C@lifetime_marker@@QAE@XZ"({{.*}})
// WIN32-LIFETIME: call void @llvm.lifetime.end.p0(i64 1, ptr %[[c]])
//
// WIN32-LIFETIME: [[lpad0]]
// WIN32-LIFETIME-NEXT: cleanuppad
// WIN32-LIFETIME: call x86_thiscallcc void @"??1C@lifetime_marker@@QAE@XZ"({{.*}})
// WIN32-LIFETIME: cleanupret {{.*}} unwind label %[[lpad1:[^ ]*]]
//
// WIN32-LIFETIME: [[lpad1]]
// WIN32-LIFETIME-NEXT: cleanuppad
// WIN32-LIFETIME: call void @llvm.lifetime.end.p0(i64 1, ptr %[[c]])
}
struct class_2 {
class_2();
virtual ~class_2();
};
struct class_1 : virtual class_2 {
class_1(){throw "Unhandled exception";}
virtual ~class_1() {}
};
struct class_0 : class_1 {
class_0() ;
virtual ~class_0() {}
};
class_0::class_0() {
// WIN32: define dso_local x86_thiscallcc noundef ptr @"??0class_0@@QAE@XZ"(ptr {{[^,]*}} returned align 4 dereferenceable(4) %this, i32 noundef %is_most_derived)
// WIN32: store i32 %is_most_derived, ptr %[[IS_MOST_DERIVED_VAR:.*]], align 4
// WIN32: %[[IS_MOST_DERIVED_VAL:.*]] = load i32, ptr %[[IS_MOST_DERIVED_VAR]]
// WIN32: %[[SHOULD_CALL_VBASE_CTORS:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
// WIN32: br i1 %[[SHOULD_CALL_VBASE_CTORS]], label %[[INIT_VBASES:.*]], label %[[SKIP_VBASES:.*]]
// WIN32: [[INIT_VBASES]]
// WIN32: br label %[[SKIP_VBASES]]
// WIN32: [[SKIP_VBASES]]
// ehcleanup:
// WIN32: %[[CLEANUPPAD:.*]] = cleanuppad within none []
// WIN32-NEXT: getelementptr inbounds i8, ptr %{{.*}}, i{{.*}} {{.}}
// WIN32-NEXT: %[[SHOULD_CALL_VBASE_DTOR:.*]] = icmp ne i32 %[[IS_MOST_DERIVED_VAL]], 0
// WIN32-NEXT: br i1 %[[SHOULD_CALL_VBASE_DTOR]], label %[[DTOR_VBASE:.*]], label %[[SKIP_VBASE:.*]]
// WIN32: [[DTOR_VBASE]]
// WIN32-NEXT: call x86_thiscallcc void @"??1class_2@@UAE@XZ"
// WIN32: br label %[[SKIP_VBASE]]
// WIN32: [[SKIP_VBASE]]
}
namespace PR37146 {
// Check that IRGen doesn't emit calls to synthesized destructors for
// non-trival C structs.
// WIN32: define dso_local void @"?test@PR37146@@YAXXZ"()
// WIN32: call void @llvm.memset.p0.i32(
// WIN32: call i32 @"?getS@PR37146@@YA?AUS@1@XZ"(
// WIN32: call void @"?func@PR37146@@YAXUS@1@0@Z"(
// WIN32-NEXT: ret void
// WIN32-NEXT: {{^}$}}
struct S {
int f;
};
void func(S, S);
S getS();
void test() {
func(getS(), S());
}
}
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