New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19946 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/cast-load-gep.ll b/test/Transforms/InstCombine/cast-load-gep.ll
new file mode 100644 (file)
index 0000000..9c997b8
--- /dev/null
+++ b/test/Transforms/InstCombine/cast-load-gep.ll
@@ -0,0 +1,22 @@
+; RUN: llvm-as < %s | opt -instcombine -globaldce | llvm-dis | not grep Array
+
+; Pulling the cast out of the load allows us to eliminate the load, and then 
+; the whole array.
+
+%unop = type {int }
+%op = type {float}
+
+%Array = internal constant [1 x %op* (%op*)*] [ %op* (%op*)* %foo ]
+
+implementation
+
+%op* %foo(%op* %X) {
+  ret %op* %X
+}
+
+%unop* %caller(%op* %O) {
+   %tmp = load %unop* (%op*)** cast ([1 x %op* (%op*)*]* %Array to %unop* (%op*)**)
+   %tmp.2 = call %unop* (%op*)* %tmp(%op* %O)
+   ret %unop* %tmp.2
+}
+