New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18272 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/getelementptr_cast.ll

@@ -0,0 +1,9 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep 'getelementptr.*cast'
+%G = external global [3 x sbyte]
+
+implementation
+
+ubyte *%foo(uint %Idx) {
+%tmp = getelementptr ubyte* cast ([3 x sbyte]* %G to ubyte*), uint %Idx
+ret ubyte* %tmp
+}