test: add a test for windows itanium exceptions

Some time ago, I noticed that try would get resolved incorrectly for Windows
Itanium targets.  Add an explicit test to exsure that exceptions are handled
correctly for Windows Itanium environments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211992 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGenCXX/windows-itanium-exceptions.cpp b/test/CodeGenCXX/windows-itanium-exceptions.cpp
new file mode 100644 (file)
index 0000000..d8a8ecd
--- /dev/null
+++ b/test/CodeGenCXX/windows-itanium-exceptions.cpp
@@ -0,0 +1,46 @@
+// RUN: %clang_cc1 -emit-llvm -triple thumbv7-windows-itanium -fexceptions -fcxx-exceptions %s -o - | FileCheck %s
+// RUN: %clang_cc1 -emit-llvm -triple i686-windows-itanium -fexceptions -fcxx-exceptions %s -o - | FileCheck %s
+
+void except() {
+  throw 32;
+}
+
+void attempt() {
+  try { except(); } catch (...) { }
+}
+
+// CHECK: @_ZTIi = external constant i8*
+
+// CHECK: define {{.*}}void @_Z6exceptv() {{.*}} {
+// CHECK:   %exception = call {{.*}}i8* @__cxa_allocate_exception(i32 4)
+// CHECK:   %0 = bitcast i8* %exception to i32*
+// CHECK:   store i32 32, i32* %0
+// CHECK:   call {{.*}}void @__cxa_throw(i8* %exception, i8* bitcast (i8** @_ZTIi to i8*), i8* null)
+// CHECK:   unreachable
+// CHECK: }
+
+// CHECK: define {{.*}}void @_Z7attemptv() {{.*}} {
+// CHECK:   %exn.slot = alloca i8*
+// CHECK:   %ehselector.slot = alloca i32
+// CHECK:   invoke {{.*}}void @_Z6exceptv()
+// CHECK:     to label %invoke.cont unwind label %lpad
+// CHECK: invoke.cont:
+// CHECK:    br label %try.cont
+// CHECK: lpad:
+// CHECK:    %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+// CHECK:      catch i8* null
+// CHECK:    %1 = extractvalue { i8*, i32 } %0, 0
+// CHECK:    store i8* %1, i8** %exn.slot
+// CHECK:    %2 = extractvalue { i8*, i32 } %0, 1
+// CHECK:    store i32 %2, i32* %ehselector.slot
+// CHECK:    br label %catch
+// CHECK: catch:
+// CHECK:    %exn = load i8** %exn.slot
+// CHECK:    %3 = call {{.*}}i8* @__cxa_begin_catch(i8* %{{2|exn}})
+// CHECK:    call {{.*}}void @__cxa_end_catch()
+// CHECK:    br label %try.cont
+// CHECK: try.cont:
+// CHECK:    ret void
+// CHECK: }
+
+