forked from OSchip/llvm-project
248 lines
9.1 KiB
C++
248 lines
9.1 KiB
C++
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 \
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// RUN: -Wno-coroutine-missing-unhandled-exception -emit-llvm %s -o - -disable-llvm-passes \
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// RUN: | FileCheck %s
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namespace std {
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namespace experimental {
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template <typename... T>
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struct coroutine_traits; // expected-note {{declared here}}
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template <class Promise = void>
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struct coroutine_handle {
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coroutine_handle() = default;
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static coroutine_handle from_address(void *) noexcept { return {}; }
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};
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template <>
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struct coroutine_handle<void> {
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static coroutine_handle from_address(void *) { return {}; }
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coroutine_handle() = default;
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template <class PromiseType>
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coroutine_handle(coroutine_handle<PromiseType>) noexcept {}
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};
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} // end namespace experimental
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struct nothrow_t {};
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constexpr nothrow_t nothrow = {};
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} // end namespace std
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// Required when get_return_object_on_allocation_failure() is defined by
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// the promise.
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using SizeT = decltype(sizeof(int));
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void *operator new(SizeT __sz, const std::nothrow_t &) noexcept;
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void operator delete(void *__p, const std::nothrow_t &)noexcept;
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struct suspend_always {
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bool await_ready() noexcept { return false; }
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void await_suspend(std::experimental::coroutine_handle<>) noexcept {}
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void await_resume() noexcept {}
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};
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struct global_new_delete_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, global_new_delete_tag> {
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struct promise_type {
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// CHECK-LABEL: f0(
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extern "C" void f0(global_new_delete_tag) {
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[NeedAlloc:.+]] = call i1 @llvm.coro.alloc(token %[[ID]])
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// CHECK: br i1 %[[NeedAlloc]], label %[[AllocBB:.+]], label %[[InitBB:.+]]
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// CHECK: [[AllocBB]]:
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: %[[MEM:.+]] = call noalias noundef nonnull i8* @_Znwm(i64 noundef %[[SIZE]])
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// CHECK: br label %[[InitBB]]
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// CHECK: [[InitBB]]:
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// CHECK: %[[PHI:.+]] = phi i8* [ null, %{{.+}} ], [ %call, %[[AllocBB]] ]
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// CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(token %[[ID]], i8* %[[PHI]])
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// CHECK: %[[MEM:.+]] = call i8* @llvm.coro.free(token %[[ID]], i8* %[[FRAME]])
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// CHECK: %[[NeedDealloc:.+]] = icmp ne i8* %[[MEM]], null
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// CHECK: br i1 %[[NeedDealloc]], label %[[FreeBB:.+]], label %[[Afterwards:.+]]
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// CHECK: [[FreeBB]]:
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// CHECK: call void @_ZdlPv(i8* noundef %[[MEM]])
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// CHECK: br label %[[Afterwards]]
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// CHECK: [[Afterwards]]:
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// CHECK: ret void
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co_return;
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}
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struct promise_new_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, promise_new_tag> {
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struct promise_type {
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void *operator new(unsigned long);
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// CHECK-LABEL: f1(
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extern "C" void f1(promise_new_tag) {
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: call noundef i8* @_ZNSt12experimental16coroutine_traitsIJv15promise_new_tagEE12promise_typenwEm(i64 noundef %[[SIZE]])
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// CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(
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// CHECK: %[[MEM:.+]] = call i8* @llvm.coro.free(token %[[ID]], i8* %[[FRAME]])
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// CHECK: call void @_ZdlPv(i8* noundef %[[MEM]])
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co_return;
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}
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struct promise_matching_placement_new_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, promise_matching_placement_new_tag, int, float, double> {
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struct promise_type {
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void *operator new(unsigned long, promise_matching_placement_new_tag,
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int, float, double);
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// CHECK-LABEL: f1a(
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extern "C" void f1a(promise_matching_placement_new_tag, int x, float y, double z) {
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// CHECK: store i32 %x, i32* %x.addr, align 4
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// CHECK: store float %y, float* %y.addr, align 4
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// CHECK: store double %z, double* %z.addr, align 8
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: %[[INT:.+]] = load i32, i32* %x.addr, align 4
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// CHECK: %[[FLOAT:.+]] = load float, float* %y.addr, align 4
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// CHECK: %[[DOUBLE:.+]] = load double, double* %z.addr, align 8
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// CHECK: call noundef i8* @_ZNSt12experimental16coroutine_traitsIJv34promise_matching_placement_new_tagifdEE12promise_typenwEmS1_ifd(i64 noundef %[[SIZE]], i32 noundef %[[INT]], float noundef %[[FLOAT]], double noundef %[[DOUBLE]])
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co_return;
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}
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// Declare a placement form operator new, such as the one described in
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// C++ 18.6.1.3.1, which takes a void* argument.
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void *operator new(SizeT __sz, void *__p) noexcept;
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struct promise_matching_global_placement_new_tag {};
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struct dummy {};
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template <>
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struct std::experimental::coroutine_traits<void, promise_matching_global_placement_new_tag, dummy *> {
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struct promise_type {
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// A coroutine that takes a single pointer argument should not invoke this
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// placement form operator. [dcl.fct.def.coroutine]/7 dictates that lookup for
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// allocation functions matching the coroutine function's signature be done
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// within the scope of the promise type's class.
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// CHECK-LABEL: f1b(
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extern "C" void f1b(promise_matching_global_placement_new_tag, dummy *) {
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// CHECK: call noalias noundef nonnull i8* @_Znwm(i64
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co_return;
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}
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struct promise_delete_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, promise_delete_tag> {
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struct promise_type {
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void operator delete(void *);
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// CHECK-LABEL: f2(
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extern "C" void f2(promise_delete_tag) {
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: call noalias noundef nonnull i8* @_Znwm(i64 noundef %[[SIZE]])
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// CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(
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// CHECK: %[[MEM:.+]] = call i8* @llvm.coro.free(token %[[ID]], i8* %[[FRAME]])
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// CHECK: call void @_ZNSt12experimental16coroutine_traitsIJv18promise_delete_tagEE12promise_typedlEPv(i8* noundef %[[MEM]])
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co_return;
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}
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struct promise_sized_delete_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, promise_sized_delete_tag> {
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struct promise_type {
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void operator delete(void *, unsigned long);
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void get_return_object() {}
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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};
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};
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// CHECK-LABEL: f3(
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extern "C" void f3(promise_sized_delete_tag) {
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: call noalias noundef nonnull i8* @_Znwm(i64 noundef %[[SIZE]])
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// CHECK: %[[FRAME:.+]] = call i8* @llvm.coro.begin(
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// CHECK: %[[MEM:.+]] = call i8* @llvm.coro.free(token %[[ID]], i8* %[[FRAME]])
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// CHECK: %[[SIZE2:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: call void @_ZNSt12experimental16coroutine_traitsIJv24promise_sized_delete_tagEE12promise_typedlEPvm(i8* noundef %[[MEM]], i64 noundef %[[SIZE2]])
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co_return;
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}
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struct promise_on_alloc_failure_tag {};
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template <>
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struct std::experimental::coroutine_traits<int, promise_on_alloc_failure_tag> {
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struct promise_type {
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int get_return_object() { return 0; }
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suspend_always initial_suspend() { return {}; }
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suspend_always final_suspend() noexcept { return {}; }
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void return_void() {}
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static int get_return_object_on_allocation_failure() { return -1; }
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};
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};
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// CHECK-LABEL: f4(
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extern "C" int f4(promise_on_alloc_failure_tag) {
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// CHECK: %[[RetVal:.+]] = alloca i32
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// CHECK: %[[ID:.+]] = call token @llvm.coro.id(i32 16
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// CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
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// CHECK: %[[MEM:.+]] = call noalias noundef i8* @_ZnwmRKSt9nothrow_t(i64 noundef %[[SIZE]], %"struct.std::nothrow_t"* noundef nonnull align 1 dereferenceable(1) @_ZStL7nothrow)
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// CHECK: %[[OK:.+]] = icmp ne i8* %[[MEM]], null
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// CHECK: br i1 %[[OK]], label %[[OKBB:.+]], label %[[ERRBB:.+]]
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// CHECK: [[ERRBB]]:
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// CHECK: %[[FailRet:.+]] = call noundef i32 @_ZNSt12experimental16coroutine_traitsIJi28promise_on_alloc_failure_tagEE12promise_type39get_return_object_on_allocation_failureEv(
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// CHECK: store i32 %[[FailRet]], i32* %[[RetVal]]
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// CHECK: br label %[[RetBB:.+]]
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// CHECK: [[OKBB]]:
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// CHECK: %[[OkRet:.+]] = call noundef i32 @_ZNSt12experimental16coroutine_traitsIJi28promise_on_alloc_failure_tagEE12promise_type17get_return_objectEv(
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// CHECK: [[RetBB]]:
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// CHECK: %[[LoadRet:.+]] = load i32, i32* %[[RetVal]], align 4
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// CHECK: ret i32 %[[LoadRet]]
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co_return;
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}
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