Restore test files accidentally deleted in r354839

I think there must be a bug in git-llvm causing parent directories to be
deleted when the diff deletes files in a subdirectory. Perhaps it is
Windows-only.

There has been a behavior change, so some of these tests now fail. I
have marked them XFAIL and will fix them in a follow-up to separate the
changes.

llvm-svn: 360699
diff --git a/clang/test/ASTMerge/codegen-exprs/Inputs/exprs1.c b/clang/test/ASTMerge/codegen-exprs/Inputs/exprs1.c
new file mode 100644
index 0000000..1c268da
--- /dev/null
+++ b/clang/test/ASTMerge/codegen-exprs/Inputs/exprs1.c
@@ -0,0 +1,10 @@
+// Matching
+enum E0 {
+  E0_Val0 = 'a',
+  E0_Val1 = (17),
+  E0_Val2 = (1 << 2),
+  E0_Val3 = E0_Val2,
+  E0_Val4 = sizeof(int*),
+  E0_Val5 = (unsigned int)-1
+};
+
diff --git a/clang/test/ASTMerge/codegen-exprs/Inputs/exprs2.c b/clang/test/ASTMerge/codegen-exprs/Inputs/exprs2.c
new file mode 100644
index 0000000..1c268da
--- /dev/null
+++ b/clang/test/ASTMerge/codegen-exprs/Inputs/exprs2.c
@@ -0,0 +1,10 @@
+// Matching
+enum E0 {
+  E0_Val0 = 'a',
+  E0_Val1 = (17),
+  E0_Val2 = (1 << 2),
+  E0_Val3 = E0_Val2,
+  E0_Val4 = sizeof(int*),
+  E0_Val5 = (unsigned int)-1
+};
+
diff --git a/clang/test/ASTMerge/codegen-exprs/test.c b/clang/test/ASTMerge/codegen-exprs/test.c
new file mode 100644
index 0000000..b5069f9
--- /dev/null
+++ b/clang/test/ASTMerge/codegen-exprs/test.c
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-pch -o %t.1.ast %S/Inputs/exprs1.c
+// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-pch -o %t.2.ast %S/Inputs/exprs2.c
+// RUN: %clang_cc1 -triple %itanium_abi_triple -emit-obj -o /dev/null -ast-merge %t.1.ast -ast-merge %t.2.ast -fsyntax-only -verify %s
+// expected-no-diagnostics
+