New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2628 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/GCSE/2002-05-14-OperandSwap.ll

@@ -0,0 +1,18 @@
+; This entire chain of computation should be optimized away, but
+; wasn't because the two multiplies were not detected as being identical.
+;
+; RUN: if as < %s  | opt -gcse -instcombine -dce | dis | grep sub
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+
+implementation   ; Functions:
+
+uint "vnum_test4"(uint* %data) {
+	%reg1101 = load uint* %data, uint 1
+	%reg1111 = load uint* %data, uint 3
+	%reg109 = mul uint %reg1101, %reg1111
+	%reg108 = mul uint %reg1111, %reg1101
+	%reg121 = sub uint %reg108, %reg109
+	ret uint %reg121
+}