clang-cl: Warn when a /TC or /TP argument is unused

Test Plan: The patch includes a test case.

Reviewers: hansw

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5338

llvm-svn: 217710
diff --git a/clang/test/Driver/cl-inputs.c b/clang/test/Driver/cl-inputs.c
index c0d4778..b0265df 100644
--- a/clang/test/Driver/cl-inputs.c
+++ b/clang/test/Driver/cl-inputs.c
@@ -34,12 +34,14 @@
 // WARN: note: The last /TC or /TP option takes precedence over earlier instances
 // WARN-NOT: note
 
-// RUN: env LIB=%S/Inputs/cl-libs %clang_cl /c /TP cl-test.lib %s -### 2>&1 | FileCheck -check-prefix=TPlib %s
+// RUN: env LIB=%S/Inputs/cl-libs %clang_cl /c /TP cl-test.lib -### 2>&1 | FileCheck -check-prefix=TPlib %s
 // TPlib: warning: cl-test.lib: 'linker' input unused
+// TPlib: warning: argument unused during compilation: '/TP'
 // TPlib-NOT: cl-test.lib
 
-// RUN: env LIB=%S/Inputs/cl-libs %clang_cl /c /TC cl-test.lib %s -### 2>&1 | FileCheck -check-prefix=TClib %s
+// RUN: env LIB=%S/Inputs/cl-libs %clang_cl /c /TC cl-test.lib -### 2>&1 | FileCheck -check-prefix=TClib %s
 // TClib: warning: cl-test.lib: 'linker' input unused
+// TClib: warning: argument unused during compilation: '/TC'
 // TClib-NOT: cl-test.lib
 
 // RUN: not %clang_cl - 2>&1 | FileCheck -check-prefix=STDIN %s