New testcase for malloc promotion

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4533 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/malloc.ll

@@ -0,0 +1,7 @@
+; test that malloc's with a constant argument are promoted to array allocations
+; RUN: as < %s | opt -instcombine -die | dis | grep getelementptr
+
+int* %test() {
+	%X = malloc int, uint 4
+	ret int* %X
+}