Report error if codegen tries to instantiate a ARM target when the cpu does support it. e.g. cortex-m* processors.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110798 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/Thumb2/div.ll b/test/CodeGen/Thumb2/div.ll
index 0cddd48..e63a115 100644
--- a/test/CodeGen/Thumb2/div.ll
+++ b/test/CodeGen/Thumb2/div.ll
@@ -1,6 +1,6 @@
 ; RUN: llc < %s -march=thumb -mattr=+thumb2 \
 ; RUN:    | FileCheck %s -check-prefix=CHECK-THUMB
-; RUN: llc < %s -march=arm -mcpu=cortex-m3 -mattr=+thumb2 \
+; RUN: llc < %s -march=thumb -mcpu=cortex-m3 -mattr=+thumb2 \
 ; RUN:    | FileCheck %s -check-prefix=CHECK-THUMBV7M
 
 define i32 @f1(i32 %a, i32 %b) {