[DAGCombine] Use APInt::extractBits in "sub-splat" constant mask detection. NFCI.

llvm-svn: 362820

1 files changed, 3 insertions, 3 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index f78f775017a..696de2c575d 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5005,10 +5005,10 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
 
         // Make sure that variable 'Constant' is only set if 'SplatBitSize' is a
         // multiple of 'BitWidth'. Otherwise, we could propagate a wrong value.
-        if (SplatBitSize % BitWidth == 0) {
+        if ((SplatBitSize % BitWidth) == 0) {
           Constant = APInt::getAllOnesValue(BitWidth);
-          for (unsigned i = 0, n = SplatBitSize/BitWidth; i < n; ++i)
-            Constant &= SplatValue.lshr(i*BitWidth).zextOrTrunc(BitWidth);
+          for (unsigned i = 0, n = (SplatBitSize / BitWidth); i < n; ++i)
+            Constant &= SplatValue.extractBits(BitWidth, i * BitWidth);
         }
       }
     }