Don't use unreachable as a placeholder, it confuses EmitBlock

This fixes an issue raised in D12412, where we generated invalid IR.

Thanks to Vedant Kumar for coming up with the initial work around.

Differential Revision: http://reviews.llvm.org/D12412

llvm-svn: 246880

1 files changed, 27 insertions, 0 deletions

diff --git a/clang/test/CodeGenCXX/partial-init.cpp b/clang/test/CodeGenCXX/partial-init.cpp
new file mode 100644
index 0000000..c13b951
--- /dev/null
+++ b/clang/test/CodeGenCXX/partial-init.cpp
@@ -0,0 +1,27 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-llvm -std=c++11 -fcxx-exceptions -fexceptions -S -emit-llvm -o - %s | FileCheck %s
+
+namespace std {
+  struct string {
+    const char *p;
+    string(const char *s);
+    ~string();
+  };
+}
+
+struct Bar {
+  int a;
+};
+
+struct Foo {
+  std::string c;
+  Bar d[32];
+};
+
+static Foo table[] = {
+  { "blerg" },
+};
+
+// CHECK: define internal void @__cxx_global_var_init
+// CHECK: invoke void @_ZNSt6stringC1EPKc(
+// CHECK-NOT: unreachable
+// CHECK: br label