test for a variety of new transformations:

* A & ~A == 0
  * A / (2^c) == A >> c  if unsigned
  * 0 / A == 0
  * 1.0 * A == A
  * A * (2^c) == A << c
  * A ^ ~A == -1
  * A | ~A == -1
  * 0 % X = 0
  * A % (2^c) == A & (c-1) if unsigned
  * A - (A & B) == A & ~B
  * -1 - A == ~A


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5588 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstCombine/and.ll

@@ -38,3 +38,8 @@ bool %test6(bool %A) {
 	ret bool %B
 }
 
+int %test7(int %A) {         ; A & ~A == 0
+        %NotA = xor int %A, -1
+        %B = and int %A, %NotA
+        ret int %B
+}