clang/test/CodeGenCoroutines/coro-unhandled-exception.cpp

   1 // RUN: %clang_cc1 -no-opaque-pointers -std=c++20 -triple=x86_64-pc-windows-msvc18.0.0 -emit-llvm %s -o - -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck %s
   2 // RUN: %clang_cc1 -no-opaque-pointers -std=c++20 -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck --check-prefix=CHECK-LPAD %s
   3
   4 #include "Inputs/coroutine.h"
   5
   6 namespace std {
   7   using exception_ptr = int;
   8   exception_ptr current_exception();
   9 }
  10
  11 struct coro_t {
  12   struct promise_type {
  13     coro_t get_return_object() {
  14       std::coroutine_handle<promise_type>{};
  15       return {};
  16     }
  17     std::suspend_never initial_suspend() { return {}; }
  18     std::suspend_never final_suspend() noexcept { return {}; }
  19     void return_void(){}
  20     void unhandled_exception() noexcept;
  21   };
  22 };
  23
  24 struct Cleanup { ~Cleanup(); };
  25 void may_throw();
  26
  27 coro_t f() {
  28   Cleanup x;
  29   may_throw();
  30   co_return;
  31 }
  32
  33 // CHECK: @"?f@@YA?AUcoro_t@@XZ"(
  34 // CHECK:   invoke void @"?may_throw@@YAXXZ"()
  35 // CHECK:       to label %{{.+}} unwind label %[[EHCLEANUP:.+]]
  36 // CHECK: [[EHCLEANUP]]:
  37 // CHECK:   %[[INNERPAD:.+]] = cleanuppad within none []
  38 // CHECK:   call void @"??1Cleanup@@QEAA@XZ"(
  39 // CHECK:   cleanupret from %[[INNERPAD]] unwind label %[[CATCHSW:.+]]
  40 // CHECK: [[CATCHSW]]:
  41 // CHECK:   %[[CATCHSWTOK:.+]] = catchswitch within none [label %[[CATCH:.+]]] unwind label
  42 // CHECK: [[CATCH]]:
  43 // CHECK:   %[[CATCHTOK:.+]] = catchpad within [[CATCHSWTOK:.+]]
  44 // CHECK:   call void @"?unhandled_exception@promise_type@coro_t@@QEAAXXZ"
  45 // CHECK:   catchret from %[[CATCHTOK]] to label %[[CATCHRETDEST:.+]]
  46 // CHECK: [[CATCHRETDEST]]:
  47 // CHECK-NEXT: br label %[[TRYCONT:.+]]
  48 // CHECK: [[TRYCONT]]:
  49 // CHECK-NEXT: br label %[[COROFIN:.+]]
  50 // CHECK: [[COROFIN]]:
  51 // CHECK-NEXT: bitcast %"struct.std::suspend_never"* %{{.+}} to i8*
  52 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(
  53 // CHECK-NEXT: call void @"?final_suspend@promise_type@coro_t@@QEAA?AUsuspend_never@std@@XZ"(
  54
  55 // CHECK-LPAD: @_Z1fv(
  56 // CHECK-LPAD:   invoke void @_Z9may_throwv()
  57 // CHECK-LPAD:       to label %[[CONT:.+]] unwind label %[[CLEANUP:.+]]
  58 // CHECK-LPAD: [[CLEANUP]]:
  59 // CHECK-LPAD:   call void @_ZN7CleanupD1Ev(%struct.Cleanup* {{[^,]*}} %x) #2
  60 // CHECK-LPAD:   br label %[[CATCH:.+]]
  61
  62 // CHECK-LPAD: [[CATCH]]:
  63 // CHECK-LPAD:    call i8* @__cxa_begin_catch
  64 // CHECK-LPAD:    call void @_ZN6coro_t12promise_type19unhandled_exceptionEv(%"struct.coro_t::promise_type"* {{[^,]*}} %__promise) #2
  65 // CHECK-LPAD:    invoke void @__cxa_end_catch()
  66 // CHECK-LPAD-NEXT:  to label %[[CATCHRETDEST:.+]] unwind label
  67 // CHECK-LPAD: [[CATCHRETDEST]]:
  68 // CHECK-LPAD-NEXT: br label %[[TRYCONT:.+]]
  69 // CHECK-LPAD: [[TRYCONT]]:
  70 // CHECK-LPAD: br label %[[COROFIN:.+]]
  71 // CHECK-LPAD: [[COROFIN]]:
  72 // CHECK-LPAD-NEXT: bitcast %"struct.std::suspend_never"* %{{.+}} to i8*
  73 // CHECK-LPAD-NEXT: call void @llvm.lifetime.start.p0i8(
  74 // CHECK-LPAD-NEXT: call void @_ZN6coro_t12promise_type13final_suspendEv(