1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMISelLowering.h b/llvm/lib/Target/ARM/ARMISelLowering.h
index fa130a1..26ff54c 100644
--- a/llvm/lib/Target/ARM/ARMISelLowering.h
+++ b/llvm/lib/Target/ARM/ARMISelLowering.h
@@ -775,6 +775,16 @@ class VectorType;
     bool shouldFoldConstantShiftPairToMask(const SDNode *N,
                                            CombineLevel Level) const override;
 
+    /// Return true if it is profitable to fold a pair of shifts into a mask.
+    bool shouldFoldMaskToVariableShiftPair(SDValue Y) const override {
+      EVT VT = Y.getValueType();
+
+      if (VT.isVector())
+        return false;
+
+      return VT.getScalarSizeInBits() <= 32;
+    }
+
     bool shouldFoldSelectWithIdentityConstant(unsigned BinOpcode, EVT VT,
                                               unsigned SelectOpcode, SDValue X,
                                               SDValue Y) const override;