New testcases that we should combine.

llvm-svn: 19219

llvm/test/Regression/Transforms/InstCombine/cast-cast-to-and.ll

@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep ubyte
+
+int %test1(uint %X) {
+        %Y = cast uint %X to ubyte ;; Turn into an AND
+        %Z = cast ubyte %Y to int
+        ret int %Z
+}
+

llvm/test/Regression/Transforms/InstCombine/zeroext-and-reduce.ll

@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep 'and int %Y, 8'
+
+int %test1(ubyte %X) {
+        %Y = cast ubyte %X to int
+        %Z = and int %Y, 65544     ;; Prune this to and Y, 8
+        ret int %Z
+}
+