[PATCH] D33750: CGCleanup: (NFC) add a test that used to trigger broken IR

[Gor Nishanov via Phabricator via cfe-commits]

GorNishanov created this revision.

Coroutine related test that used to trigger broken IR prior to r304335.


https://reviews.llvm.org/D33750

Files:
  test/CodeGenCoroutines/coro-await-domination.cpp


Index: test/CodeGenCoroutines/coro-await-domination.cpp
===================================================================
--- /dev/null
+++ test/CodeGenCoroutines/coro-await-domination.cpp
@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fcoroutines-ts -std=c++14 -emit-llvm %s -o - | FileCheck %s
+#include "Inputs/coroutine.h"
+
+using namespace std::experimental;
+
+struct coro {
+  struct promise_type {
+    coro get_return_object();
+    suspend_never initial_suspend();
+    suspend_never final_suspend();
+    void return_void();
+    static void unhandled_exception();
+  };
+};
+
+struct A {
+  ~A();
+  bool await_ready();
+  int await_resume() { return 8; }
+  template <typename F> void await_suspend(F);
+};
+
+extern "C" void consume(int);
+
+// Verifies that domination is properly built during cleanup.
+// Without CGCleanup.cpp fix verifier was reporting:
+// Instruction does not dominate all uses!
+//  %tmp.exprcleanup = alloca i32*, align 8
+//  store i32* %x, i32** %tmp.exprcleanup, align 8
+
+
+// CHECK-LABEL: f(
+extern "C" coro f(int) {
+  int x = 42;
+  x = co_await A{};
+  consume(x);
+}
+


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