[llvm] r302897 - [DAGCombine] Use SelectionDAG::getZExtOrTrunc helper. NFCI.

[Simon Pilgrim via llvm-commits]

Author: rksimon
Date: Fri May 12 08:22:12 2017
New Revision: 302897

URL: http://llvm.org/viewvc/llvm-project?rev=302897&view=rev
Log:
[DAGCombine] Use SelectionDAG::getZExtOrTrunc helper. NFCI.

Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp?rev=302897&r1=302896&r2=302897&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri May 12 08:22:12 2017
@@ -7361,14 +7361,8 @@ SDValue DAGCombiner::visitZERO_EXTEND(SD
                         N0.getValueSizeInBits(),
                         std::min(Op.getValueSizeInBits(),
                                  VT.getSizeInBits()));
-    if (TruncatedBits.isSubsetOf(Known.Zero)) {
-      if (VT.bitsGT(Op.getValueType()))
-        return DAG.getNode(ISD::ZERO_EXTEND, SDLoc(N), VT, Op);
-      if (VT.bitsLT(Op.getValueType()))
-        return DAG.getNode(ISD::TRUNCATE, SDLoc(N), VT, Op);
-
-      return Op;
-    }
+    if (TruncatedBits.isSubsetOf(Known.Zero))
+      return DAG.getZExtOrTrunc(Op, SDLoc(N), VT);
   }
 
   // fold (zext (truncate (load x))) -> (zext (smaller load x))