Fix bug when compiling CUDA code with -emit-llvm and -o. 

In this case the device code is not injected into an host action and therefore the 
user should get an error as -o can't be used when generating two outputs.

llvm-svn: 285263
diff --git a/clang/test/Driver/cuda-output-asm.cu b/clang/test/Driver/cuda-output-asm.cu
index af62478..af066ce 100644
--- a/clang/test/Driver/cuda-output-asm.cu
+++ b/clang/test/Driver/cuda-output-asm.cu
@@ -1,4 +1,4 @@
-// Tests CUDA compilation with -S.
+// Tests CUDA compilation with -S and -emit-llvm.
 
 // REQUIRES: clang-driver
 // REQUIRES: x86-registered-target
@@ -26,4 +26,6 @@
 // RUN: %clang -### -S -target x86_64-linux-gnu --cuda-device-only \
 // RUN:   --cuda-gpu-arch=sm_20 --cuda-gpu-arch=sm_30 -o foo.s %s 2>&1 \
 // RUN:   | FileCheck -check-prefix MULTIPLE-OUTPUT-FILES %s
+// RUN: %clang -### -emit-llvm -c -target x86_64-linux-gnu -o foo.s %s 2>&1 \
+// RUN:   | FileCheck -check-prefix MULTIPLE-OUTPUT-FILES %s
 // MULTIPLE-OUTPUT-FILES: error: cannot specify -o when generating multiple output files