fa87fa97fb
EHTerminateScope is used to implement C++ noexcept semantics. Per C++ [except.terminate], it is implemented-defined whether no, some, or all cleanups are run prior to terminatation. Therefore, the code to run cleanups on the way towards termination is unnecessary, and may be omitted. After this change, we will still run some cleanups: any cleanups in a function called from the noexcept function will continue to run, while those in the noexcept function itself will not. (Commit attempt 2: check InnermostEHScope != stable_end() before accessing it.) Differential Revision: https://reviews.llvm.org/D113620
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin10 -emit-llvm -o - -fcxx-exceptions -fexceptions -std=c++11 | FileCheck %s
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// rdar://11904428
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// Ensure that we call __cxa_begin_catch before calling
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// std::terminate in a noexcept function.
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namespace test0 {
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void foo();
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struct A {
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A();
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~A();
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};
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void test() noexcept {
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A a;
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foo();
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}
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}
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// CHECK-LABEL: define{{.*}} void @_ZN5test04testEv()
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// This goes to the terminate lpad.
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// CHECK: invoke void @_ZN5test01AC1Ev(
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// CHECK-NEXT: unwind label %[[TERMINATE_LPAD:.*]]
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// This also goes to the terminate lpad (no cleanups!).
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// CHECK: invoke void @_ZN5test03fooEv()
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// CHECK-NEXT: unwind label %[[TERMINATE_LPAD]]
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// Destructors don't throw by default in C++11.
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// CHECK: call void @_ZN5test01AD1Ev(
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// Cleanup lpad.
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// CHECK: [[TERMINATE_LPAD]]:
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// CHECK-NEXT: [[T0:%.*]] = landingpad
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// CHECK-NEXT: catch i8* null
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// CHECK-NEXT: [[T1:%.*]] = extractvalue { i8*, i32 } [[T0]], 0
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// CHECK-NEXT: call void @__clang_call_terminate(i8* [[T1]])
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// CHECK-NEXT: unreachable
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// CHECK-LABEL: define linkonce_odr hidden void @__clang_call_terminate(
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// CHECK: call i8* @__cxa_begin_catch(
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// CHECK-NEXT: call void @_ZSt9terminatev()
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// CHECK-NEXT: unreachable
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