Index: lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
===================================================================
--- lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -1417,12 +1417,6 @@
       }
     }
 
-    // (A&((~A)|B)) -> A&B
-    if (match(Op0, m_c_Or(m_Not(m_Specific(Op1)), m_Value(A))))
-      return BinaryOperator::CreateAnd(A, Op1);
-    if (match(Op1, m_c_Or(m_Not(m_Specific(Op0)), m_Value(A))))
-      return BinaryOperator::CreateAnd(A, Op0);
-
     // (A ^ B) & ((B ^ C) ^ A) -> (A ^ B) & ~C
     if (match(Op0, m_Xor(m_Value(A), m_Value(B))))
       if (match(Op1, m_Xor(m_Xor(m_Specific(B), m_Value(C)), m_Specific(A))))
@@ -2020,18 +2014,6 @@
 
   Value *A, *B;
 
-  // ((~A & B) | A) -> (A | B)
-  if (match(Op0, m_c_And(m_Not(m_Specific(Op1)), m_Value(A))))
-    return BinaryOperator::CreateOr(A, Op1);
-  if (match(Op1, m_c_And(m_Not(m_Specific(Op0)), m_Value(A))))
-    return BinaryOperator::CreateOr(Op0, A);
-
-  // ((A & B) | ~A) -> (~A | B)
-  // The NOT is guaranteed to be in the RHS by complexity ordering.
-  if (match(Op1, m_Not(m_Value(A))) &&
-      match(Op0, m_c_And(m_Specific(A), m_Value(B))))
-    return BinaryOperator::CreateOr(Op1, B);
-
   // (A & C)|(B & D)
   Value *C = nullptr, *D = nullptr;
   if (match(Op0, m_And(m_Value(A), m_Value(C))) &&
Index: lib/Transforms/InstCombine/InstructionCombining.cpp
===================================================================
--- lib/Transforms/InstCombine/InstructionCombining.cpp
+++ lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -636,17 +636,35 @@
     Value *A = Op0->getOperand(0), *B = Op0->getOperand(1), *C = RHS;
     Instruction::BinaryOps InnerOpcode = Op0->getOpcode(); // op'
 
+    Value *L = SimplifyBinOp(TopLevelOpcode, A, C, SQ.getWithInstruction(&I));
+    Value *R = SimplifyBinOp(TopLevelOpcode, B, C, SQ.getWithInstruction(&I));
+
     // Do "A op C" and "B op C" both simplify?
-    if (Value *L =
-            SimplifyBinOp(TopLevelOpcode, A, C, SQ.getWithInstruction(&I)))
-      if (Value *R =
-              SimplifyBinOp(TopLevelOpcode, B, C, SQ.getWithInstruction(&I))) {
-        // They do! Return "L op' R".
-        ++NumExpand;
-        C = Builder.CreateBinOp(InnerOpcode, L, R);
-        C->takeName(&I);
-        return C;
-      }
+    if (L && R) {
+      // They do! Return "L op' R".
+      ++NumExpand;
+      C = Builder.CreateBinOp(InnerOpcode, L, R);
+      C->takeName(&I);
+      return C;
+    }
+
+    // Do "A op C" simplify to the identity value for the inner opcode?
+    if (L && L == ConstantExpr::getBinOpIdentity(InnerOpcode, L->getType())) {
+      // They do! Return "B op C".
+      ++NumExpand;
+      C = Builder.CreateBinOp(TopLevelOpcode, B, C);
+      C->takeName(&I);
+      return C;
+    }
+
+    // Do "B op C" simplify to the identity value for the inner opcode?
+    if (R && R == ConstantExpr::getBinOpIdentity(InnerOpcode, R->getType())) {
+      // They do! Return "A op C".
+      ++NumExpand;
+      C = Builder.CreateBinOp(TopLevelOpcode, A, C);
+      C->takeName(&I);
+      return C;
+    }
   }
 
   if (Op1 && LeftDistributesOverRight(TopLevelOpcode, Op1->getOpcode())) {
@@ -655,17 +673,35 @@
     Value *A = LHS, *B = Op1->getOperand(0), *C = Op1->getOperand(1);
     Instruction::BinaryOps InnerOpcode = Op1->getOpcode(); // op'
 
+    Value *L = SimplifyBinOp(TopLevelOpcode, A, B, SQ.getWithInstruction(&I));
+    Value *R = SimplifyBinOp(TopLevelOpcode, A, C, SQ.getWithInstruction(&I));
+
     // Do "A op B" and "A op C" both simplify?
-    if (Value *L =
-            SimplifyBinOp(TopLevelOpcode, A, B, SQ.getWithInstruction(&I)))
-      if (Value *R =
-              SimplifyBinOp(TopLevelOpcode, A, C, SQ.getWithInstruction(&I))) {
-        // They do! Return "L op' R".
-        ++NumExpand;
-        A = Builder.CreateBinOp(InnerOpcode, L, R);
-        A->takeName(&I);
-        return A;
-      }
+    if (L && R) {
+      // They do! Return "L op' R".
+      ++NumExpand;
+      A = Builder.CreateBinOp(InnerOpcode, L, R);
+      A->takeName(&I);
+      return A;
+    }
+
+    // Do "A op B" simplify to the identity value for the inner opcode?
+    if (L && L == ConstantExpr::getBinOpIdentity(InnerOpcode, L->getType())) {
+      // They do! Return "A op C".
+      ++NumExpand;
+      A = Builder.CreateBinOp(TopLevelOpcode, A, C);
+      A->takeName(&I);
+      return A;
+    }
+
+    // Do "A op C" simplify to the identity value for the inner opcode?
+    if (R && R == ConstantExpr::getBinOpIdentity(InnerOpcode, R->getType())) {
+      // They do! Return "A op B".
+      ++NumExpand;
+      A = Builder.CreateBinOp(TopLevelOpcode, A, B);
+      A->takeName(&I);
+      return A;
+    }
   }
 
   // (op (select (a, c, b)), (select (a, d, b))) -> (select (a, (op c, d), 0))
Index: test/Transforms/InstCombine/and.ll
===================================================================
--- test/Transforms/InstCombine/and.ll
+++ test/Transforms/InstCombine/and.ll
@@ -683,10 +683,8 @@
 define i1 @and_orn_cmp_1(i32 %a, i32 %b, i32 %c) {
 ; CHECK-LABEL: @and_orn_cmp_1(
 ; CHECK-NEXT:    [[X:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i32 [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[Y]], [[X_INV]]
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[OR]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[AND]]
 ;
   %x = icmp sgt i32 %a, %b
@@ -703,10 +701,8 @@
 define <2 x i1> @and_orn_cmp_2(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
 ; CHECK-LABEL: @and_orn_cmp_2(
 ; CHECK-NEXT:    [[X:%.*]] = icmp sge <2 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt <2 x i32> [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <2 x i32> [[C:%.*]], <i32 42, i32 47>
-; CHECK-NEXT:    [[OR:%.*]] = or <2 x i1> [[Y]], [[X_INV]]
-; CHECK-NEXT:    [[AND:%.*]] = and <2 x i1> [[OR]], [[X]]
+; CHECK-NEXT:    [[AND:%.*]] = and <2 x i1> [[Y]], [[X]]
 ; CHECK-NEXT:    ret <2 x i1> [[AND]]
 ;
   %x = icmp sge <2 x i32> %a, %b
@@ -723,10 +719,8 @@
 define i1 @and_orn_cmp_3(i72 %a, i72 %b, i72 %c) {
 ; CHECK-LABEL: @and_orn_cmp_3(
 ; CHECK-NEXT:    [[X:%.*]] = icmp ugt i72 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule i72 [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i72 [[C:%.*]], 42
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_INV]], [[Y]]
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[OR]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[AND]]
 ;
   %x = icmp ugt i72 %a, %b
@@ -743,10 +737,8 @@
 define <3 x i1> @or_andn_cmp_4(<3 x i32> %a, <3 x i32> %b, <3 x i32> %c) {
 ; CHECK-LABEL: @or_andn_cmp_4(
 ; CHECK-NEXT:    [[X:%.*]] = icmp eq <3 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne <3 x i32> [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <3 x i32> [[C:%.*]], <i32 42, i32 43, i32 -1>
-; CHECK-NEXT:    [[OR:%.*]] = or <3 x i1> [[X_INV]], [[Y]]
-; CHECK-NEXT:    [[AND:%.*]] = and <3 x i1> [[OR]], [[X]]
+; CHECK-NEXT:    [[AND:%.*]] = and <3 x i1> [[Y]], [[X]]
 ; CHECK-NEXT:    ret <3 x i1> [[AND]]
 ;
   %x = icmp eq <3 x i32> %a, %b
@@ -762,11 +754,9 @@
 
 define i1 @andn_or_cmp_1(i37 %a, i37 %b, i37 %c) {
 ; CHECK-LABEL: @andn_or_cmp_1(
-; CHECK-NEXT:    [[X:%.*]] = icmp sgt i37 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i37 [[C:%.*]], 42
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[Y]], [[X]]
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_INV]], [[OR]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_INV]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[AND]]
 ;
   %x = icmp sgt i37 %a, %b
@@ -782,11 +772,9 @@
 
 define i1 @andn_or_cmp_2(i16 %a, i16 %b, i16 %c) {
 ; CHECK-LABEL: @andn_or_cmp_2(
-; CHECK-NEXT:    [[X:%.*]] = icmp sge i16 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i16 [[C:%.*]], 42
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[Y]], [[X]]
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[OR]], [[X_INV]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X_INV]]
 ; CHECK-NEXT:    ret i1 [[AND]]
 ;
   %x = icmp sge i16 %a, %b
@@ -802,11 +790,9 @@
 
 define <4 x i1> @andn_or_cmp_3(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
 ; CHECK-LABEL: @andn_or_cmp_3(
-; CHECK-NEXT:    [[X:%.*]] = icmp ugt <4 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule <4 x i32> [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule <4 x i32> [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <4 x i32> [[C:%.*]], <i32 42, i32 0, i32 1, i32 -1>
-; CHECK-NEXT:    [[OR:%.*]] = or <4 x i1> [[X]], [[Y]]
-; CHECK-NEXT:    [[AND:%.*]] = and <4 x i1> [[X_INV]], [[OR]]
+; CHECK-NEXT:    [[AND:%.*]] = and <4 x i1> [[X_INV]], [[Y]]
 ; CHECK-NEXT:    ret <4 x i1> [[AND]]
 ;
   %x = icmp ugt <4 x i32> %a, %b
@@ -822,11 +808,9 @@
 
 define i1 @andn_or_cmp_4(i32 %a, i32 %b, i32 %c) {
 ; CHECK-LABEL: @andn_or_cmp_4(
-; CHECK-NEXT:    [[X:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X]], [[Y]]
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[OR]], [[X_INV]]
+; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X_INV]]
 ; CHECK-NEXT:    ret i1 [[AND]]
 ;
   %x = icmp eq i32 %a, %b
Index: test/Transforms/InstCombine/or.ll
===================================================================
--- test/Transforms/InstCombine/or.ll
+++ test/Transforms/InstCombine/or.ll
@@ -714,10 +714,8 @@
 define i1 @or_andn_cmp_1(i32 %a, i32 %b, i32 %c) {
 ; CHECK-LABEL: @or_andn_cmp_1(
 ; CHECK-NEXT:    [[X:%.*]] = icmp sgt i32 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i32 [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X_INV]]
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X]], [[AND]]
+; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[OR]]
 ;
   %x = icmp sgt i32 %a, %b
@@ -734,10 +732,8 @@
 define <2 x i1> @or_andn_cmp_2(<2 x i32> %a, <2 x i32> %b, <2 x i32> %c) {
 ; CHECK-LABEL: @or_andn_cmp_2(
 ; CHECK-NEXT:    [[X:%.*]] = icmp sge <2 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt <2 x i32> [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <2 x i32> [[C:%.*]], <i32 42, i32 47>
-; CHECK-NEXT:    [[AND:%.*]] = and <2 x i1> [[Y]], [[X_INV]]
-; CHECK-NEXT:    [[OR:%.*]] = or <2 x i1> [[AND]], [[X]]
+; CHECK-NEXT:    [[OR:%.*]] = or <2 x i1> [[Y]], [[X]]
 ; CHECK-NEXT:    ret <2 x i1> [[OR]]
 ;
   %x = icmp sge <2 x i32> %a, %b
@@ -754,10 +750,8 @@
 define i1 @or_andn_cmp_3(i72 %a, i72 %b, i72 %c) {
 ; CHECK-LABEL: @or_andn_cmp_3(
 ; CHECK-NEXT:    [[X:%.*]] = icmp ugt i72 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule i72 [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i72 [[C:%.*]], 42
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X_INV]], [[Y]]
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X]], [[AND]]
+; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[OR]]
 ;
   %x = icmp ugt i72 %a, %b
@@ -774,10 +768,8 @@
 define <3 x i1> @or_andn_cmp_4(<3 x i32> %a, <3 x i32> %b, <3 x i32> %c) {
 ; CHECK-LABEL: @or_andn_cmp_4(
 ; CHECK-NEXT:    [[X:%.*]] = icmp eq <3 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne <3 x i32> [[A]], [[B]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <3 x i32> [[C:%.*]], <i32 42, i32 43, i32 -1>
-; CHECK-NEXT:    [[AND:%.*]] = and <3 x i1> [[X_INV]], [[Y]]
-; CHECK-NEXT:    [[OR:%.*]] = or <3 x i1> [[AND]], [[X]]
+; CHECK-NEXT:    [[OR:%.*]] = or <3 x i1> [[Y]], [[X]]
 ; CHECK-NEXT:    ret <3 x i1> [[OR]]
 ;
   %x = icmp eq <3 x i32> %a, %b
@@ -793,11 +785,9 @@
 
 define i1 @orn_and_cmp_1(i37 %a, i37 %b, i37 %c) {
 ; CHECK-LABEL: @orn_and_cmp_1(
-; CHECK-NEXT:    [[X:%.*]] = icmp sgt i37 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp sle i37 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i37 [[C:%.*]], 42
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X]]
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_INV]], [[AND]]
+; CHECK-NEXT:    [[OR:%.*]] = or i1 [[X_INV]], [[Y]]
 ; CHECK-NEXT:    ret i1 [[OR]]
 ;
   %x = icmp sgt i37 %a, %b
@@ -813,11 +803,9 @@
 
 define i1 @orn_and_cmp_2(i16 %a, i16 %b, i16 %c) {
 ; CHECK-LABEL: @orn_and_cmp_2(
-; CHECK-NEXT:    [[X:%.*]] = icmp sge i16 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp slt i16 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i16 [[C:%.*]], 42
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[Y]], [[X]]
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[AND]], [[X_INV]]
+; CHECK-NEXT:    [[OR:%.*]] = or i1 [[Y]], [[X_INV]]
 ; CHECK-NEXT:    ret i1 [[OR]]
 ;
   %x = icmp sge i16 %a, %b
@@ -833,11 +821,9 @@
 
 define <4 x i1> @orn_and_cmp_3(<4 x i32> %a, <4 x i32> %b, <4 x i32> %c) {
 ; CHECK-LABEL: @orn_and_cmp_3(
-; CHECK-NEXT:    [[X:%.*]] = icmp ugt <4 x i32> [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule <4 x i32> [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp ule <4 x i32> [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt <4 x i32> [[C:%.*]], <i32 42, i32 0, i32 1, i32 -1>
-; CHECK-NEXT:    [[AND:%.*]] = and <4 x i1> [[X]], [[Y]]
-; CHECK-NEXT:    [[OR:%.*]] = or <4 x i1> [[X_INV]], [[AND]]
+; CHECK-NEXT:    [[OR:%.*]] = or <4 x i1> [[X_INV]], [[Y]]
 ; CHECK-NEXT:    ret <4 x i1> [[OR]]
 ;
   %x = icmp ugt <4 x i32> %a, %b
@@ -853,11 +839,9 @@
 
 define i1 @orn_and_cmp_4(i32 %a, i32 %b, i32 %c) {
 ; CHECK-LABEL: @orn_and_cmp_4(
-; CHECK-NEXT:    [[X:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
-; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A]], [[B]]
+; CHECK-NEXT:    [[X_INV:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
 ; CHECK-NEXT:    [[Y:%.*]] = icmp ugt i32 [[C:%.*]], 42
-; CHECK-NEXT:    [[AND:%.*]] = and i1 [[X]], [[Y]]
-; CHECK-NEXT:    [[OR:%.*]] = or i1 [[AND]], [[X_INV]]
+; CHECK-NEXT:    [[OR:%.*]] = or i1 [[Y]], [[X_INV]]
 ; CHECK-NEXT:    ret i1 [[OR]]
 ;
   %x = icmp eq i32 %a, %b