Index: lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
===================================================================
--- lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -2542,6 +2542,14 @@
     if (match(Op0I, m_Xor(m_Value(A), m_Value(B))) &&
         match(Op1I, m_And(m_Specific(A), m_Specific(B))))
       return BinaryOperator::CreateOr(A, B);
+    // (~A ^ B) ^ (~B & A) -> (A | ~B)
+    if (match(Op0I, m_Xor(m_Not(m_Value(A)), m_Value(B))) &&
+        match(Op1I, m_And(m_Not(m_Specific(B)), m_Specific(A))))
+      return BinaryOperator::CreateOr(A, Builder->CreateNot(B));
+    // (A & ~B) ^ (B ^ ~A) -> (A | ~B)
+    if (match(Op0I, m_And(m_Value(A), m_Not(m_Value(B)))) &&
+        match(Op1I, m_Xor(m_Specific(B), m_Not(m_Specific(A)))))
+      return BinaryOperator::CreateOr(A, Builder->CreateNot(B));
   }
 
   // (A | B)^(~A) -> (A | ~B)
Index: test/Transforms/InstCombine/or-xor.ll
===================================================================
--- test/Transforms/InstCombine/or-xor.ll
+++ test/Transforms/InstCombine/or-xor.ll
@@ -139,13 +139,13 @@
 
 ; ((x | y) ^ (x ^ y)) -> (x & y)
 define i32 @test15(i32 %x, i32 %y) {
-  %1 = xor i32 %y, %x
-  %2 = or i32 %y, %x
-  %3 = xor i32 %2, %1
-  ret i32 %3
+  %xor = xor i32 %y, %x
+  %or = or i32 %y, %x
+  %xor1 = xor i32 %or, %xor
+  ret i32 %xor1
 ; CHECK-LABEL: @test15(
-; CHECK-NEXT: %1 = and i32 %y, %x
-; CHECK-NEXT: ret i32 %1
+; CHECK-NEXT: %xor1 = and i32 %y, %x
+; CHECK-NEXT: ret i32 %xor1
 }
 
 ; ((x | ~y) ^ (~x | y)) -> x ^ y
@@ -160,3 +160,17 @@
 ; CHECK-NEXT: %xor = xor i32 %x, %y
 ; CHECK-NEXT: ret i32 %xor
 }
+
+; ((~x ^ y) ^ (~y & x)) -> (x | ~y)
+define i32 @test17(i32 %x, i32 %y) {
+  %notx = xor i32 %x, -1
+  %xor1 = xor i32 %notx, %y
+  %noty = xor i32 %y, -1
+  %and = and i32 %noty, %x
+  %xor2 = xor i32 %xor1, %and
+  ret i32 %xor2
+; CHECK-LABEL: @test17(
+; CHECK-NEXT: %1 = xor i32 %y, -1
+; CHECK-NEXT: %xor2 = or i32 %x, %1
+; CHECK-NEXT: ret i32 %xor2
+}