added some tests to check stupid pattern matching mistakes

llvm-svn: 21154
diff --git a/llvm/test/Regression/CodeGen/Alpha/bic.ll b/llvm/test/Regression/CodeGen/Alpha/bic.ll
new file mode 100644
index 0000000..581fc61
--- /dev/null
+++ b/llvm/test/Regression/CodeGen/Alpha/bic.ll
@@ -0,0 +1,11 @@
+; Make sure this testcase codegens to the bic instruction
+; RUN: llvm-as < %s | llc -march=alpha | grep 'bic'
+
+implementation   ; Functions:
+
+long %bar(long %x, long %y) {
+entry:
+	%tmp.1 = xor long %x, -1  		; <long> [#uses=1]
+        %tmp.2 = and long %y, long %tmp.1
+	ret long %tmp.2
+}