// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.13.99 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,UNALIGNED,THROWEND %s
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.14 -std=c++11 -emit-llvm -o - %s | FileCheck --check-prefixes=CHECK,ALIGNED,THROWEND %s
// RUN: %clang_cc1 -fcxx-exceptions -fexceptions -triple x86_64-apple-macosx10.14 -std=c++11 -emit-llvm -o - %s -fassume-nothrow-exception-dtor -DNOTHROWEND | FileCheck --check-prefixes=CHECK,ALIGNED,NOTHROWEND %s
struct test1_D {
double d;
} d1;
void test1() {
throw d1;
}
// CHECK-LABEL: define{{.*}} void @_Z5test1v()
// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 8)
// UNALIGNED-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 8 [[EXNOBJ]], ptr align 8 @d1, i64 8, i1 false)
// ALIGNED-NEXT: call void @llvm.memcpy.p0.p0.i64(ptr align 16 [[EXNOBJ]], ptr align 8 @d1, i64 8, i1 false)
// CHECK-NEXT: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTI7test1_D, ptr null) [[NR:#[0-9]+]]
// CHECK-NEXT: unreachable
struct test2_D {
test2_D(const test2_D&o);
test2_D();
virtual void bar() { }
int i; int j;
} d2;
void test2() {
throw d2;
}
// CHECK-LABEL: define{{.*}} void @_Z5test2v()
// CHECK: [[EXNVAR:%.*]] = alloca ptr
// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
// CHECK-NEXT: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 16)
// CHECK-NEXT: invoke void @_ZN7test2_DC1ERKS_(ptr {{[^,]*}} [[EXNOBJ]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) @d2)
// CHECK-NEXT: to label %[[CONT:.*]] unwind label %{{.*}}
// : [[CONT]]: (can't check this in Release-Asserts builds)
// CHECK: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTI7test2_D, ptr null) [[NR]]
// CHECK-NEXT: unreachable
struct test3_D {
test3_D() { }
test3_D(volatile test3_D&o);
virtual void bar();
};
void test3() {
throw (volatile test3_D *)0;
}
// CHECK-LABEL: define{{.*}} void @_Z5test3v()
// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 8)
// CHECK-NEXT: store ptr null, ptr [[EXNOBJ]]
// CHECK-NEXT: call void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTIPV7test3_D, ptr null) [[NR]]
// CHECK-NEXT: unreachable
void test4() {
throw;
}
// CHECK-LABEL: define{{.*}} void @_Z5test4v()
// CHECK: call void @__cxa_rethrow() [[NR]]
// CHECK-NEXT: unreachable
namespace test5 {
struct A {
A();
A(const A&);
~A();
};
void test() {
try { throw A(); } catch (A &x) {}
}
// CHECK-LABEL: define{{.*}} void @_ZN5test54testEv()
// CHECK: [[EXNOBJ:%.*]] = call ptr @__cxa_allocate_exception(i64 1)
// CHECK: invoke void @_ZN5test51AC1Ev(ptr {{[^,]*}} [[EXNOBJ]])
// CHECK: invoke void @__cxa_throw(ptr [[EXNOBJ]], ptr @_ZTIN5test51AE, ptr @_ZN5test51AD1Ev) [[NR]]
// CHECK-NEXT: to label {{%.*}} unwind label %[[HANDLER:[^ ]*]]
// : [[HANDLER]]: (can't check this in Release-Asserts builds)
// CHECK: {{%.*}} = call i32 @llvm.eh.typeid.for.p0(ptr @_ZTIN5test51AE)
}
namespace test6 {
template <class T> struct allocator {
~allocator() throw() { }
};
void foo() {
allocator<int> a;
}
}
// PR7127
namespace test7 {
// CHECK-LABEL: define{{.*}} i32 @_ZN5test73fooEv()
// CHECK-SAME: personality ptr @__gxx_personality_v0
int foo() {
// CHECK: [[CAUGHTEXNVAR:%.*]] = alloca ptr
// CHECK-NEXT: [[SELECTORVAR:%.*]] = alloca i32
// CHECK-NEXT: [[INTCATCHVAR:%.*]] = alloca i32
try {
try {
// CHECK-NEXT: [[EXNALLOC:%.*]] = call ptr @__cxa_allocate_exception
// CHECK-NEXT: store i32 1, ptr
// CHECK-NEXT: invoke void @__cxa_throw(ptr [[EXNALLOC]], ptr @_ZTIi, ptr null
throw 1;
}
// CHECK: [[CAUGHTVAL:%.*]] = landingpad { ptr, i32 }
// CHECK-NEXT: catch ptr @_ZTIi
// CHECK-NEXT: catch ptr null
// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 0
// CHECK-NEXT: store ptr [[CAUGHTEXN]], ptr [[CAUGHTEXNVAR]]
// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 1
// CHECK-NEXT: store i32 [[SELECTOR]], ptr [[SELECTORVAR]]
// CHECK-NEXT: br label
// CHECK: [[SELECTOR:%.*]] = load i32, ptr [[SELECTORVAR]]
// CHECK-NEXT: [[T0:%.*]] = call i32 @llvm.eh.typeid.for.p0(ptr @_ZTIi)
// CHECK-NEXT: icmp eq i32 [[SELECTOR]], [[T0]]
// CHECK-NEXT: br i1
// CHECK: [[T0:%.*]] = load ptr, ptr [[CAUGHTEXNVAR]]
// CHECK-NEXT: [[T1:%.*]] = call ptr @__cxa_begin_catch(ptr [[T0]])
// CHECK-NEXT: [[T3:%.*]] = load i32, ptr [[T1]]
// CHECK-NEXT: store i32 [[T3]], ptr {{%.*}}, align 4
// CHECK-NEXT: invoke void @__cxa_rethrow
catch (int) {
throw;
}
}
// CHECK: [[CAUGHTVAL:%.*]] = landingpad { ptr, i32 }
// CHECK-NEXT: catch ptr null
// CHECK-NEXT: [[CAUGHTEXN:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 0
// CHECK-NEXT: store ptr [[CAUGHTEXN]], ptr [[CAUGHTEXNVAR]]
// CHECK-NEXT: [[SELECTOR:%.*]] = extractvalue { ptr, i32 } [[CAUGHTVAL]], 1
// CHECK-NEXT: store i32 [[SELECTOR]], ptr [[SELECTORVAR]]
// CHECK-NEXT: call void @__cxa_end_catch()
// CHECK-NEXT: br label
// CHECK: load ptr, ptr [[CAUGHTEXNVAR]]
// CHECK-NEXT: call ptr @__cxa_begin_catch
// CHECK-NEXT: call void @__cxa_end_catch
catch (...) {
}
// CHECK: ret i32 0
return 0;
}
}
// Ordering of destructors in a catch handler.
namespace test8 {
struct A { A(const A&); ~A(); };
void bar();
// CHECK-LABEL: define{{.*}} void @_ZN5test83fooEv()
void foo() {
try {
// CHECK: invoke void @_ZN5test83barEv()
bar();
} catch (A a) {
// CHECK: call ptr @__cxa_get_exception_ptr
// CHECK-NEXT: invoke void @_ZN5test81AC1ERKS0_(
// CHECK: call ptr @__cxa_begin_catch
// CHECK-NEXT: call void @_ZN5test81AD1Ev(
// CHECK: call void @__cxa_end_catch()
// CHECK: ret void
}
}
}
// Constructor function-try-block must rethrow on fallthrough.
namespace test9 {
void opaque();
struct A { A(); };
// CHECK-LABEL: define{{.*}} void @_ZN5test91AC2Ev(ptr {{[^,]*}} %this) unnamed_addr
// CHECK-SAME: personality ptr @__gxx_personality_v0
A::A() try {
// CHECK: invoke void @_ZN5test96opaqueEv()
opaque();
} catch (int x) {
// CHECK: landingpad { ptr, i32 }
// CHECK-NEXT: catch ptr @_ZTIi
// CHECK: call ptr @__cxa_begin_catch
// CHECK: invoke void @_ZN5test96opaqueEv()
// CHECK: invoke void @__cxa_rethrow()
// CHECK-LABEL: define{{.*}} void @_ZN5test91AC1Ev(ptr {{[^,]*}} %this) unnamed_addr
// CHECK: call void @_ZN5test91AC2Ev
// CHECK-NEXT: ret void
opaque();
}
}
// __cxa_end_catch can throw for some kinds of caught exceptions.
namespace test10 {
void opaque();
struct A { ~A(); };
struct B { int x; };
// CHECK-LABEL: define{{.*}} void @_ZN6test103fooEv()
void foo() {
A a; // force a cleanup context
try {
// CHECK: invoke void @_ZN6test106opaqueEv()
opaque();
} catch (int i) {
// CHECK: call ptr @__cxa_begin_catch
// CHECK-NEXT: load i32, ptr
// CHECK-NEXT: store i32
// CHECK-NEXT: call void @__cxa_end_catch() [[NUW:#[0-9]+]]
} catch (B a) {
// CHECK: call ptr @__cxa_begin_catch
// CHECK-NEXT: call void @llvm.memcpy
// THROWEND-NEXT: invoke void @__cxa_end_catch()
// NOTHROWEND-NEXT: call void @__cxa_end_catch() [[NUW]]
} catch (...) {
// CHECK: call ptr @__cxa_begin_catch
// THROWEND-NEXT: invoke void @__cxa_end_catch()
// NOTHROWEND-NEXT: call void @__cxa_end_catch() [[NUW]]
}
// THROWEND: call void @_ZN6test101AD1Ev(
// NOTHROWEND-NOT: call void @_ZN6test101AD1Ev(
}
}
// __cxa_begin_catch returns pointers by value, even when catching by reference
namespace test11 {
void opaque();
// CHECK-LABEL: define{{.*}} void @_ZN6test113fooEv()
void foo() {
try {
// CHECK: invoke void @_ZN6test116opaqueEv()
opaque();
} catch (int**&p) {
// CHECK: [[EXN:%.*]] = load ptr, ptr
// CHECK-NEXT: call ptr @__cxa_begin_catch(ptr [[EXN]]) [[NUW]]
// CHECK-NEXT: [[ADJ1:%.*]] = getelementptr i8, ptr [[EXN]], i32 32
// CHECK-NEXT: store ptr [[ADJ1]], ptr [[P:%.*]]
// CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
}
}
struct A {};
// CHECK-LABEL: define{{.*}} void @_ZN6test113barEv()
void bar() {
try {
// CHECK: [[EXNSLOT:%.*]] = alloca ptr
// CHECK-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
// CHECK-NEXT: [[P:%.*]] = alloca ptr,
// CHECK-NEXT: [[TMP:%.*]] = alloca ptr
// CHECK-NEXT: invoke void @_ZN6test116opaqueEv()
opaque();
} catch (A*&p) {
// CHECK: [[EXN:%.*]] = load ptr, ptr [[EXNSLOT]]
// CHECK-NEXT: [[ADJ1:%.*]] = call ptr @__cxa_begin_catch(ptr [[EXN]]) [[NUW]]
// CHECK-NEXT: store ptr [[ADJ1]], ptr [[TMP]]
// CHECK-NEXT: store ptr [[TMP]], ptr [[P]]
// CHECK-NEXT: call void @__cxa_end_catch() [[NUW]]
}
}
}
// PR7686
namespace test12 {
struct A { ~A() noexcept(false); };
bool opaque(const A&);
// CHECK-LABEL: define{{.*}} void @_ZN6test124testEv()
void test() {
// CHECK: [[X:%.*]] = alloca [[A:%.*]],
// CHECK: [[EHCLEANUPDEST:%.*]] = alloca i32
// CHECK: [[Y:%.*]] = alloca [[A:%.*]]
// CHECK: [[Z:%.*]] = alloca [[A]]
// CHECK: [[CLEANUPDEST:%.*]] = alloca i32
A x;
// CHECK: invoke noundef zeroext i1 @_ZN6test126opaqueERKNS_1AE(
if (opaque(x)) {
A y;
A z;
// CHECK: invoke void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[Z]])
// CHECK: invoke void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[Y]])
// CHECK-NOT: switch
goto success;
}
success:
bool _ = true;
// CHECK: call void @_ZN6test121AD1Ev(ptr {{[^,]*}} [[X]])
// CHECK-NEXT: ret void
}
}
// Reduced from some TableGen code that was causing a self-host crash.
namespace test13 {
struct A { ~A(); };
void test0(int x) {
try {
switch (x) {
case 0:
break;
case 1:{
A a;
break;
}
default:
return;
}
return;
} catch (int x) {
}
return;
}
void test1(int x) {
A y;
try {
switch (x) {
default: break;
}
} catch (int x) {}
}
}
namespace test14 {
struct A { ~A(); };
struct B { ~B(); };
B b();
void opaque();
void foo() {
A a;
try {
B str = b();
opaque();
} catch (int x) {
}
}
}
// JumpDests shouldn't get confused by scopes that aren't normal cleanups.
namespace test15 {
struct A { ~A(); };
bool opaque(int);
// CHECK-LABEL: define{{.*}} void @_ZN6test153fooEv()
void foo() {
A a;
try {
// CHECK: [[X:%.*]] = alloca i32
// CHECK: store i32 10, ptr [[X]]
// CHECK-NEXT: br label
// -> while.cond
int x = 10;
while (true) {
// CHECK: load i32, ptr [[X]]
// CHECK-NEXT: [[COND:%.*]] = invoke noundef zeroext i1 @_ZN6test156opaqueEi
// CHECK: br i1 [[COND]]
if (opaque(x))
// CHECK: br label
break;
// CHECK: br label
}
// CHECK: br label
} catch (int x) { }
// CHECK: call void @_ZN6test151AD1Ev
}
}
namespace test16 {
struct A { A(); ~A() noexcept(false); };
struct B { int x; B(const A &); ~B() noexcept(false); };
void foo();
bool cond();
// CHECK-LABEL: define{{.*}} void @_ZN6test163barEv()
void bar() {
// THROWEND: [[EXN_SAVE:%.*]] = alloca ptr
// THROWEND-NEXT: [[EXN_ACTIVE:%.*]] = alloca i1
// THROWEND-NEXT: [[TEMP:%.*]] = alloca [[A:%.*]],
// THROWEND-NEXT: [[EXNSLOT:%.*]] = alloca ptr
// THROWEND-NEXT: [[SELECTORSLOT:%.*]] = alloca i32
// THROWEND-NEXT: [[TEMP_ACTIVE:%.*]] = alloca i1
#ifndef NOTHROWEND
cond() ? throw B(A()) : foo();
#endif
// THROWEND-NEXT: [[COND:%.*]] = call noundef zeroext i1 @_ZN6test164condEv()
// THROWEND-NEXT: store i1 false, ptr [[EXN_ACTIVE]]
// THROWEND-NEXT: store i1 false, ptr [[TEMP_ACTIVE]]
// THROWEND-NEXT: br i1 [[COND]],
// THROWEND: [[EXN:%.*]] = call ptr @__cxa_allocate_exception(i64 4)
// THROWEND-NEXT: store ptr [[EXN]], ptr [[EXN_SAVE]]
// THROWEND-NEXT: store i1 true, ptr [[EXN_ACTIVE]]
// THROWEND-NEXT: invoke void @_ZN6test161AC1Ev(ptr {{[^,]*}} [[TEMP]])
// THROWEND: store i1 true, ptr [[TEMP_ACTIVE]]
// THROWEND-NEXT: invoke void @_ZN6test161BC1ERKNS_1AE(ptr {{[^,]*}} [[EXN]], ptr noundef nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) [[TEMP]])
// THROWEND: store i1 false, ptr [[EXN_ACTIVE]]
// THROWEND-NEXT: invoke void @__cxa_throw(ptr [[EXN]],
// THROWEND: invoke void @_ZN6test163fooEv()
// THROWEND: br label
// THROWEND: invoke void @_ZN6test161AD1Ev(ptr {{[^,]*}} [[TEMP]])
// THROWEND: ret void
// THROWEND: [[T0:%.*]] = load i1, ptr [[EXN_ACTIVE]]
// THROWEND-NEXT: br i1 [[T0]]
// THROWEND: [[T1:%.*]] = load ptr, ptr [[EXN_SAVE]]
// THROWEND-NEXT: call void @__cxa_free_exception(ptr [[T1]])
// THROWEND-NEXT: br label
}
}
namespace test17 {
class BaseException {
private:
int a[4];
public:
BaseException() {};
};
class DerivedException: public BaseException {
};
int foo() {
throw DerivedException();
// The alignment passed to memset is 16 on Darwin.
// CHECK: [[T0:%.*]] = call ptr @__cxa_allocate_exception(i64 16)
// UNALIGNED-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[T0]], i8 0, i64 16, i1 false)
// ALIGNED-NEXT: call void @llvm.memset.p0.i64(ptr align 16 [[T0]], i8 0, i64 16, i1 false)
}
}
// CHECK: attributes [[NUW]] = { nounwind }
// CHECK: attributes [[NR]] = { noreturn }
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