Add a couple rlwinm tests for bitfield clears

llvm-svn: 22624

llvm/test/Regression/CodeGen/PowerPC/rlwinm.ll

@@ -0,0 +1,17 @@
+; All of these ands and shifts should be folded into rlwimi's
+; RUN: llvm-as < rlwinm.ll | llc -march=ppc32 | not grep and && 
+; RUN: llvm-as < rlwinm.ll | llc -march=ppc32 | grep rlwinm | wc -l | grep 2
+
+implementation   ; Functions:
+
+int %test1(int %a) {
+entry:
+        %tmp.1 = and int %a, 268431360          ; <int> [#uses=1]
+        ret int %tmp.1
+}
+
+int %test2(int %a) {
+entry:
+        %tmp.1 = and int %a, -268435441         ; <int> [#uses=1]
+        ret int %tmp.1
+}