* Add testcases for associative operators

* Add testcase for or ubyte, 255 which was broken before


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5735 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/and.ll

@@ -43,3 +43,9 @@ int %test7(int %A) {         ; A & ~A == 0
         %B = and int %A, %NotA
         ret int %B
 }
+
+ubyte %test8(ubyte %A) {    ; AND associates
+	%B = and ubyte %A, 3
+	%C = and ubyte %B, 4
+	ret ubyte %C
+}

test/Transforms/InstCombine/mul.ll

@@ -32,3 +32,9 @@ int %test5(int %A) {
 	%B = mul int %A, 8
 	ret int %B
 }
+
+int %test6(ubyte %A) {
+	%B = mul ubyte %A, 8
+	%C = mul ubyte %B, 13
+	ret ubyte %C
+}

test/Transforms/InstCombine/or.ll

@@ -18,6 +18,11 @@ int %test2(int %A) {
 	ret int %B
 }
 
+ubyte %test2a(ubyte %A) {
+	%B = or ubyte %A, 255
+	ret ubyte %B
+}
+
 bool %test3(bool %A) {
 	%B = or bool %A, false
 	ret bool %B
@@ -75,3 +80,14 @@ uint %test13(uint %A) { ; (A|B)^B == A & (~B)
 	%r  = xor uint %t1, 123
 	ret uint %r
 }
+
+ubyte %test14(ubyte %A) {
+	%B = or ubyte %A, 254
+	%C = or ubyte %B, 1
+	ret ubyte %C
+}
+ubyte %test15(ubyte %A) {
+	%B = xor ubyte %A, 17
+	%C = xor ubyte %B, 17
+	ret ubyte %C
+}