New testcase to see if -indvars can promote pointer arithmetic to array accesses

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10577 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/IndVarsSimplify/pointer-indvars.ll b/test/Transforms/IndVarsSimplify/pointer-indvars.ll
new file mode 100644 (file)
index 0000000..b5eb106
--- /dev/null
+++ b/test/Transforms/IndVarsSimplify/pointer-indvars.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | opt -indvars | llvm-dis | grep indvar
+
+%G = global int* null
+
+%Array = external global [40 x int]
+
+void %test() {
+       br label %Loop
+Loop:
+       %X = phi int* [getelementptr ([40 x int]* %Array, long 0, long 0), %0], [%X.next, %Loop]
+       %X.next = getelementptr int* %X, long 1
+       store int* %X, int** %G
+       br label %Loop
+}