Add tests for c++ exceptions (try/catch)

Closes llvm#46

Author: mikaoP

clang/test/OmpSs-RT/Clang_OmpSs-2/success_task_exception_01.cpp

@@ -0,0 +1,63 @@
+/*--------------------------------------------------------------------
+  (C) Copyright 2006-2013 Barcelona Supercomputing Center
+                          Centro Nacional de Supercomputacion
+
+  This file is part of Mercurium C/C++ source-to-source compiler.
+
+  See AUTHORS file in the top level directory for information
+  regarding developers and contributors.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 3 of the License, or (at your option) any later version.
+
+  Mercurium C/C++ source-to-source compiler is distributed in the hope
+  that it will be useful, but WITHOUT ANY WARRANTY; without even the
+  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+  PURPOSE.  See the GNU Lesser General Public License for more
+  details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with Mercurium C/C++ source-to-source compiler; if
+  not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+  Cambridge, MA 02139, USA.
+--------------------------------------------------------------------*/
+
+// RUN: %oss-cxx-compile-and-run | FileCheck %s
+
+#include <iostream>       // std::cout
+#include <exception>      // std::exception_ptr, std::current_exception, std::rethrow_exception
+#include <stdexcept>      // std::logic_error
+
+int main () {
+  std::exception_ptr p; // shared between tasks because the second one needs it
+                        // for rethrow
+  #pragma oss task shared(p)
+  {
+      try {
+         throw std::logic_error("some logic_error exception");   // throws
+      } catch(const std::exception& e) {
+         p = std::current_exception();
+         std::cout << "exception caught, but continuing...\n";
+      }
+  }
+  #pragma oss taskwait
+
+  std::cout << "(after exception)\n";
+
+  #pragma oss task
+  {
+      try {
+         std::rethrow_exception (p);
+      } catch (const std::exception& e) {
+         std::cout << "exception caught: " << e.what() << '\n';
+      }
+  }
+  #pragma oss taskwait
+  return 0;
+}
+
+// CHECK: exception caught, but continuing...
+// CHECK-NEXT: (after exception)
+// CHECK-NEXT: exception caught: some logic_error exception

clang/test/OmpSs-RT/lit.local.cfg

@@ -9,7 +9,7 @@ local_config.append(("%oss-cxx-compile-and-run", \
 # Insert before already defined %clangxx and %clang match
 # substitution
 local_config.append(("%oss-cxx-compile", \
-	"%clangxx -fompss-2 -Werror=extra-tokens -fno-exceptions %s -o %t"))
+	"%clangxx -fompss-2 -Werror=extra-tokens %s -o %t"))
 local_config.append(("%oss-compile", \
 	"%clang -fompss-2 -Werror=extra-tokens %s -o %t"))
 local_config.append(("%oss-run", "%t"))

clang/test/OmpSs/IR/task_exceptions.cpp

@@ -0,0 +1,44 @@
+// RUN: %clang_cc1 -verify -fompss-2 -fexceptions -fcxx-exceptions -disable-llvm-passes -ferror-limit 100 %s -S -emit-llvm -o - | FileCheck %s
+// expected-no-diagnostics
+
+
+// TODO: Fix this
+void foo1() {
+    #pragma oss task
+    {
+        throw 1;
+    }
+}
+
+void foo1() {
+    #pragma oss task
+    {
+        try {
+            throw 1;
+        } catch (int e) {
+        }
+    }
+    #pragma oss task
+    {
+        try {
+            throw 1;
+        } catch (int e) {
+        }
+    }
+}
+
+// Each task has its own exn.slot, ehselector.slot, and all it's exception
+// handling BB
+
+// CHECK: %0 = call token @llvm.directive.region.entry() [ "DIR.OSS"([5 x i8] c"TASK\00") ]
+// CHECK-NEXT: %exn.slot = alloca i8*
+// CHECK-NEXT: %ehselector.slot = alloca i32
+// CHECK: try.cont:                                         ; preds = %catch
+// CHECK: call void @llvm.directive.region.exit(token %0)
+// CHECK-NEXT: %9 = call token @llvm.directive.region.entry() [ "DIR.OSS"([5 x i8] c"TASK\00") ]
+// CHECK-NEXT: %exn.slot4 = alloca i8*
+// CHECK-NEXT: %ehselector.slot5 = alloca i32
+// CHECK: try.cont12:                                       ; preds = %catch9
+// CHECK: call void @llvm.directive.region.exit(token %9)
+// CHECK-NEXT: ret void
+