Fix -Wlarge-by-value-copy option handling in the driver.
CC1 supports only the joined format.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156161 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/warning-options.cpp b/test/Driver/warning-options.cpp
new file mode 100644
index 0000000..a36210d
--- /dev/null
+++ b/test/Driver/warning-options.cpp
@@ -0,0 +1,4 @@
+// RUN: %clang -### -Wlarge-by-value-copy %s 2>&1 | FileCheck -check-prefix=LARGE_VALUE_COPY_DEFAULT %s
+// LARGE_VALUE_COPY_DEFAULT: -Wlarge-by-value-copy=64
+// RUN: %clang -### -Wlarge-by-value-copy=128 %s 2>&1 | FileCheck -check-prefix=LARGE_VALUE_COPY_JOINED %s
+// LARGE_VALUE_COPY_JOINED: -Wlarge-by-value-copy=128