[llvm] r336957 - [InstCombine] Simplify isKnownNegation

[Fangrui Song via llvm-commits]

Author: maskray
Date: Thu Jul 12 15:56:23 2018
New Revision: 336957

URL: http://llvm.org/viewvc/llvm-project?rev=336957&view=rev
Log:
[InstCombine] Simplify isKnownNegation

Modified:
    llvm/trunk/lib/Analysis/ValueTracking.cpp

Modified: llvm/trunk/lib/Analysis/ValueTracking.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Analysis/ValueTracking.cpp?rev=336957&r1=336956&r2=336957&view=diff
==============================================================================
--- llvm/trunk/lib/Analysis/ValueTracking.cpp (original)
+++ llvm/trunk/lib/Analysis/ValueTracking.cpp Thu Jul 12 15:56:23 2018
@@ -4524,11 +4524,8 @@ bool llvm::isKnownNegation(const Value *
 
   // X = sub (A, B), Y = sub (B, A)
   Value *A, *B;
-  if (match(X, m_Sub(m_Value(A), m_Value(B))) &&
-      match(Y, m_Sub(m_Specific(B), m_Specific(A))))
-    return true;
-
-  return false;
+  return match(X, m_Sub(m_Value(A), m_Value(B))) &&
+         match(Y, m_Sub(m_Specific(B), m_Specific(A)));
 }
 
 static SelectPatternResult matchSelectPattern(CmpInst::Predicate Pred,