[llvm] r306860 - [InstCombine] Add m_BitReverse pattern match helper. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri Jun 30 11:58:29 2017
New Revision: 306860

URL: http://llvm.org/viewvc/llvm-project?rev=306860&view=rev
Log:
[InstCombine] Add m_BitReverse pattern match helper. NFCI.

Modified:
    llvm/trunk/include/llvm/IR/PatternMatch.h
    llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp

Modified: llvm/trunk/include/llvm/IR/PatternMatch.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/IR/PatternMatch.h?rev=306860&r1=306859&r2=306860&view=diff
==============================================================================
--- llvm/trunk/include/llvm/IR/PatternMatch.h (original)
+++ llvm/trunk/include/llvm/IR/PatternMatch.h Fri Jun 30 11:58:29 2017
@@ -1360,6 +1360,11 @@ m_Intrinsic(const T0 &Op0, const T1 &Op1
 
 // Helper intrinsic matching specializations.
 template <typename Opnd0>
+inline typename m_Intrinsic_Ty<Opnd0>::Ty m_BitReverse(const Opnd0 &Op0) {
+  return m_Intrinsic<Intrinsic::bitreverse>(Op0);
+}
+
+template <typename Opnd0>
 inline typename m_Intrinsic_Ty<Opnd0>::Ty m_BSwap(const Opnd0 &Op0) {
   return m_Intrinsic<Intrinsic::bswap>(Op0);
 }

Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp?rev=306860&r1=306859&r2=306860&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp Fri Jun 30 11:58:29 2017
@@ -1985,7 +1985,7 @@ Instruction *InstCombiner::visitCallInst
     Value *X = nullptr;
 
     // bitreverse(bitreverse(x)) -> x
-    if (match(IIOperand, m_Intrinsic<Intrinsic::bitreverse>(m_Value(X))))
+    if (match(IIOperand, m_BitReverse(m_Value(X))))
       return replaceInstUsesWith(CI, X);
     break;
   }