Add a bunch of tests for ANDs that should be eliminated.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19216 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/and.ll b/test/Transforms/InstCombine/and.ll
index 67b34a3be5e6b32b32e8d385faf4b0b3271d754a..b217c7e39c1c18d542dc3917322e64d7e406ca20 100644 (file)
--- a/test/Transforms/InstCombine/and.ll
+++ b/test/Transforms/InstCombine/and.ll
@@ -179,3 +179,16 @@ ubyte %test27(ubyte %A) {
        %E = add ubyte %D, 16
        ret ubyte %E
 }
+
+int %test28(int %X) {       ;; This is juse a zero extending shr.
+        %Y = shr int %X, ubyte 24  ;; Sign extend
+        %Z = and int %Y, 255       ;; Mask out sign bits
+        ret int %Z
+}
+
+int %test29(ubyte %X) {
+        %Y = cast ubyte %X to int
+        %Z = and int %Y, 255       ;; Zero extend makes this unneeded.
+        ret int %Z
+}
+