From 0cc4ed1ca504c9e5631d16ababb8baceb4fce6ea Mon Sep 17 00:00:00 2001
From: Benjamin Kramer <benny.kra@googlemail.com>
Date: Mon, 12 Jul 2010 12:35:49 +0000
Subject: [PATCH] Revert r108136 until I figure out why it broke selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108139 91177308-0d34-0410-b5e6-96231b3b80d8
---
 .../InstCombine/InstCombineAndOrXor.cpp         | 17 -----------------
 test/Transforms/InstCombine/or.ll               | 14 --------------
 test/Transforms/InstCombine/xor2.ll             | 14 --------------
 3 files changed, 45 deletions(-)

diff --git a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index 3bfeba11cc2..8586054fce0 100644
--- a/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -1584,14 +1584,6 @@ Instruction *InstCombiner::visitOr(BinaryOperator &I) {
     if ((match(A, m_Not(m_Specific(B))) &&
          match(D, m_Not(m_Specific(C)))))
       return BinaryOperator::CreateXor(C, B);
-
-    // (A & ~C) | (B & C) -> ((B ^ A) & C) ^ A
-    if (Op0->hasOneUse() && Op1->hasOneUse() &&
-        match(C, m_Not(m_Specific(D)))) {
-      Value *Xor = Builder->CreateXor(B, A, "xor");
-      Value *And = Builder->CreateAnd(Xor, D, "and");
-      return BinaryOperator::CreateXor(And, A);
-    }
   }
   
   // (X >> Z) | (Y >> Z)  -> (X|Y) >> Z  for all shifts.
@@ -1928,15 +1920,6 @@ Instruction *InstCombiner::visitXor(BinaryOperator &I) {
         return BinaryOperator::CreateAnd(NewOp, X);
       }
     }
-
-    // (A & ~C) ^ (B & C) -> ((B ^ A) & C) ^ A
-    if (Op0->hasOneUse() && Op1->hasOneUse() &&
-        match(Op0I, m_And(m_Value(A), m_Not(m_Value(D)))) &&
-        match(Op1I, m_And(m_Value(B), m_Value(D)))) {
-      Value *Xor = Builder->CreateXor(B, A, "xor");
-      Value *And = Builder->CreateAnd(Xor, D, "and");
-      return BinaryOperator::CreateXor(And, A);
-    }
   }
     
   // (icmp1 A, B) ^ (icmp2 A, B) --> (icmp3 A, B)
diff --git a/test/Transforms/InstCombine/or.ll b/test/Transforms/InstCombine/or.ll
index 86fca14dbdf..c3526b77f6a 100644
--- a/test/Transforms/InstCombine/or.ll
+++ b/test/Transforms/InstCombine/or.ll
@@ -350,17 +350,3 @@ define <4 x i32> @test32(<4 x i1> %and.i1352, <4 x i32> %vecinit6.i176, <4 x i32
 ; CHECK: or <4 x i32> %and.i, %and.i129
 }
 
-; PR6773
-define i32 @test33(i32 %x, i32 %y, i32 %z) nounwind readnone {
-  %and = and i32 %y, %x
-  %not = xor i32 %x, -1
-  %and2 = and i32 %z, %not
-  %xor = xor i32 %and2, %and
-  ret i32 %xor
-; CHECK: @test33
-; CHECK: xor i32
-; CHECK: and i32
-; CHECK: xor i32
-; CHECK: ret i32
-}
-
diff --git a/test/Transforms/InstCombine/xor2.ll b/test/Transforms/InstCombine/xor2.ll
index 27ce3bff471..67f05efa23d 100644
--- a/test/Transforms/InstCombine/xor2.ll
+++ b/test/Transforms/InstCombine/xor2.ll
@@ -51,17 +51,3 @@ define i32 @test4(i32 %A, i32 %B) {
 ; CHECK: %1 = ashr i32 %A, %B
 ; CHECK: ret i32 %1
 }
-
-; PR6773
-define i32 @test5(i32 %x, i32 %y, i32 %z) nounwind readnone {
-  %and = and i32 %y, %x
-  %not = xor i32 %x, -1
-  %and2 = and i32 %z, %not
-  %or = or i32 %and2, %and
-  ret i32 %or
-; CHECK: @test5
-; CHECK: xor i32
-; CHECK: and i32
-; CHECK: xor i32
-; CHECK: ret i32
-}