forked from OSchip/llvm-project
165 lines
4.6 KiB
C++
165 lines
4.6 KiB
C++
// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple=x86_64-pc-windows-msvc \
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// RUN: -mconstructor-aliases -fexceptions -fcxx-exceptions \
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// RUN: -O1 -disable-llvm-passes \
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// RUN: | FileCheck -check-prefix WIN64 %s
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extern "C" void might_throw();
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// Simplify the generated IR with noexcept.
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extern "C" void recover() noexcept(true);
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extern "C" void handle_exception(void *e) noexcept(true);
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extern "C" void catch_all() {
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try {
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might_throw();
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} catch (...) {
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recover();
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}
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}
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// WIN64-LABEL: define dso_local void @catch_all()
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// WIN64: invoke void @might_throw()
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// WIN64-NEXT: to label %[[cont:[^ ]*]] unwind label %[[catchswitch_lpad:[^ ]*]]
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//
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// WIN64: [[catchswitch_lpad]]
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// WIN64: %[[catchswitch:[^ ]*]] = catchswitch within none [label %[[catchpad_lpad:[^ ]*]]] unwind to caller
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//
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// WIN64: [[catchpad_lpad]]
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// WIN64: catchpad within %[[catchswitch]] [i8* null, i32 64, i8* null]
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// WIN64: call void @recover()
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// WIN64: catchret from %{{.*}} to label %[[catchret:[^ ]*]]
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//
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// WIN64: [[catchret]]
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// WIN64-NEXT: br label %[[ret:[^ ]*]]
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//
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// WIN64: [[ret]]
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// WIN64: ret void
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//
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// WIN64: [[cont]]
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// WIN64: br label %[[ret]]
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extern "C" void catch_int() {
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try {
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might_throw();
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} catch (int e) {
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handle_exception(&e);
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}
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}
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// WIN64-LABEL: define dso_local void @catch_int()
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// WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i32* %[[e_addr:[^\]]*]]]
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//
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// The catchpad instruction starts the lifetime of 'e'. Unfortunately, that
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// leaves us with nowhere to put lifetime.start, so we don't emit lifetime
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// markers for now.
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// WIN64-NOT: lifetime.start
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//
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// WIN64: %[[e_i8:[^ ]*]] = bitcast i32* %[[e_addr]] to i8*
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// WIN64-NOT: lifetime.start
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// WIN64: call void @handle_exception
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// WIN64-SAME: (i8* noundef %[[e_i8]])
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// WIN64-NOT: lifetime.end
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// WIN64: catchret
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extern "C" void catch_int_unnamed() {
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try {
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might_throw();
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} catch (int) {
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}
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}
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// WIN64-LABEL: define dso_local void @catch_int_unnamed()
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// WIN64: catchpad within %{{.*}} [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
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// WIN64: catchret
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struct A {
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A();
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A(const A &o);
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~A();
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int a;
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};
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struct B : A {
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B();
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B(const B &o);
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~B();
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int b;
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};
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extern "C" void catch_a_byval() {
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try {
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might_throw();
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} catch (A e) {
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handle_exception(&e);
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}
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}
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// WIN64-LABEL: define dso_local void @catch_a_byval()
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// WIN64: %[[e_addr:[^ ]*]] = alloca %struct.A
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// WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor7* @"??_R0?AUA@@@8", i32 0, %struct.A* %[[e_addr]]]
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// WIN64: %[[e_i8:[^ ]*]] = bitcast %struct.A* %[[e_addr]] to i8*
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// WIN64: call void @handle_exception(i8* noundef %[[e_i8]])
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// WIN64: catchret
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extern "C" void catch_a_ref() {
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try {
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might_throw();
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} catch (A &e) {
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handle_exception(&e);
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}
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}
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// WIN64-LABEL: define dso_local void @catch_a_ref()
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// WIN64: %[[e_addr:[^ ]*]] = alloca %struct.A*
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// WIN64: catchpad within %{{[^ ]*}} [%rtti.TypeDescriptor7* @"??_R0?AUA@@@8", i32 8, %struct.A** %[[e_addr]]]
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// WIN64: %[[eptr:[^ ]*]] = load %struct.A*, %struct.A** %[[e_addr]]
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// WIN64: %[[eptr_i8:[^ ]*]] = bitcast %struct.A* %[[eptr]] to i8*
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// WIN64: call void @handle_exception(i8* noundef %[[eptr_i8]])
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// WIN64: catchret
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extern "C" void fn_with_exc_spec() throw(int) {
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might_throw();
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}
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// WIN64-LABEL: define dso_local void @fn_with_exc_spec()
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// WIN64: call void @might_throw()
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// WIN64-NEXT: ret void
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extern "C" void catch_nested() {
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try {
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might_throw();
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} catch (int) {
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try {
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might_throw();
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} catch (int) {
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might_throw();
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}
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}
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}
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// WIN64-LABEL: define dso_local void @catch_nested()
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// WIN64: invoke void @might_throw()
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// WIN64-NEXT: to label %{{.*}} unwind label %[[catchswitch_outer:[^ ]*]]
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//
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// WIN64: [[catchswitch_outer]]
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// WIN64: %[[catchswitch_outer_scope:[^ ]*]] = catchswitch within none [label %[[catch_int_outer:[^ ]*]]] unwind to caller
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//
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// WIN64: [[catch_int_outer]]
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// WIN64: %[[catchpad:[^ ]*]] = catchpad within %[[catchswitch_outer_scope]] [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
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// WIN64: invoke void @might_throw()
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// WIN64-NEXT: to label %[[cont2:[^ ]*]] unwind label %[[catchswitch_inner:[^ ]*]]
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//
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// WIN64: [[catchswitch_inner]]
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// WIN64: %[[catchswitch_inner_scope:[^ ]*]] = catchswitch within %[[catchpad]] [label %[[catch_int_inner:[^ ]*]]] unwind to caller
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//
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// WIN64: [[catch_int_inner]]
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// WIN64: catchpad within %[[catchswitch_inner_scope]] [%rtti.TypeDescriptor2* @"??_R0H@8", i32 0, i8* null]
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// WIN64-NEXT: call void @might_throw()
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// WIN64: catchret {{.*}} to label %[[catchret2:[^ ]*]]
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//
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// WIN64: [[catchret2]]
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// WIN64: catchret {{.*}} to label %[[mainret:[^ ]*]]
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//
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// WIN64: [[mainret]]
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// WIN64: ret void
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