clang/test/CodeGenCoroutines/coro-alloc-2.cpp

   1 // Tests that we wouldn't generate an allocation call in global scope with (std::size_t, p0, ..., pn)
   2 // RUN: %clang_cc1 %s -std=c++20 -S -triple x86_64-unknown-linux-gnu -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
   3 #include "Inputs/coroutine.h"
   4
   5 namespace std {
   6 typedef decltype(sizeof(int)) size_t;
   7 }
   8
   9 struct Allocator {};
  10
  11 struct resumable {
  12   struct promise_type {
  13
  14     resumable get_return_object() { return {}; }
  15     auto initial_suspend() { return std::suspend_always(); }
  16     auto final_suspend() noexcept { return std::suspend_always(); }
  17     void unhandled_exception() {}
  18     void return_void(){};
  19   };
  20 };
  21
  22 void *operator new(std::size_t, void *);
  23
  24 resumable f1(void *) {
  25   co_return;
  26 }
  27
  28 // CHECK: coro.alloc:
  29 // CHECK-NEXT: [[SIZE:%.+]] = call [[BITWIDTH:.+]] @llvm.coro.size.[[BITWIDTH]]()
  30 // CHECK-NEXT: call {{.*}} ptr @_Znwm([[BITWIDTH]] noundef [[SIZE]])