1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/SystemZ/SystemZOperators.td b/lib/Target/SystemZ/SystemZOperators.td
index 3cfe23aec417..5103867e2d9a 100644
--- a/lib/Target/SystemZ/SystemZOperators.td
+++ b/lib/Target/SystemZ/SystemZOperators.td
@@ -697,6 +697,16 @@ class storei<SDPatternOperator operator, SDPatternOperator store = store>
   : PatFrag<(ops node:$addr),
             (store (operator), node:$addr)>;
 
+// Create a shift operator that optionally ignores an AND of the
+// shift count with an immediate if the bottom 6 bits are all set.
+def imm32bottom6set : PatLeaf<(i32 imm), [{
+  return (N->getZExtValue() & 0x3f) == 0x3f;
+}]>;
+class shiftop<SDPatternOperator operator>
+  : PatFrags<(ops node:$val, node:$count),
+             [(operator node:$val, node:$count),
+              (operator node:$val, (and node:$count, imm32bottom6set))]>;
+
 // Vector representation of all-zeros and all-ones.
 def z_vzero : PatFrag<(ops), (bitconvert (v16i8 (z_byte_mask (i32 0))))>;
 def z_vones : PatFrag<(ops), (bitconvert (v16i8 (z_byte_mask (i32 65535))))>;