From: Chris Lattner <sabre@nondot.org>
Date: Mon, 1 Dec 2008 05:16:26 +0000 (+0000)
Subject: simplify these patterns using m_Specific.  No need to grep for
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d8aafcb200bf413a5f477148b7f4ff6d6ea31e2d;p=oota-llvm.git

simplify these patterns using m_Specific.  No need to grep for
xor in testcase (or is a substring).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60328 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 11c5f752977..bc8744480c5 100644
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -3980,22 +3980,12 @@ Instruction *InstCombiner::visitAnd(BinaryOperator &I) {
     }
 
     // (A&((~A)|B)) -> A&B
-    if (match(Op0, m_Or(m_Not(m_Value(A)), m_Value(B)))) {
-      if (A == Op1)
-        return BinaryOperator::CreateAnd(A, B);
-    }
-    if (match(Op0, m_Or(m_Value(A), m_Not(m_Value(B))))) {
-      if (B == Op1)
-        return BinaryOperator::CreateAnd(A, B);
-    }
-    if (match(Op1, m_Or(m_Not(m_Value(A)), m_Value(B)))) {
-      if (A == Op0)
-        return BinaryOperator::CreateAnd(A, B);
-    }
-    if (match(Op1, m_Or(m_Value(A), m_Not(m_Value(B))))) {
-      if (B == Op0)
-        return BinaryOperator::CreateAnd(A, B);
-    }
+    if (match(Op0, m_Or(m_Not(m_Specific(Op1)), m_Value(A))) ||
+        match(Op0, m_Or(m_Value(A), m_Not(m_Specific(Op1)))))
+      return BinaryOperator::CreateAnd(A, Op1);
+    if (match(Op1, m_Or(m_Not(m_Specific(Op0)), m_Value(A))) ||
+        match(Op1, m_Or(m_Value(A), m_Not(m_Specific(Op0)))))
+      return BinaryOperator::CreateAnd(A, Op0);
   }
   
   if (ICmpInst *RHS = dyn_cast<ICmpInst>(Op1)) {
diff --git a/test/Transforms/InstCombine/and-not-or.ll b/test/Transforms/InstCombine/and-not-or.ll
index b183b216e9d..9e9f397c4be 100644
--- a/test/Transforms/InstCombine/and-not-or.ll
+++ b/test/Transforms/InstCombine/and-not-or.ll
@@ -1,6 +1,4 @@
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %y, %x} | count 2
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %x, %y} | count 2
-; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {xor}
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {and i32 %x, %y} | count 4
 ; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep {or}
 
 define i32 @func1(i32 %x, i32 %y) nounwind {