[PATCH] D64699: [X86] Return UNDEF from LowerScalarImmediateShift when the shift amount is out of range.

[Phabricator via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL366096: [X86] Return UNDEF from LowerScalarImmediateShift when the shift amount is out… (authored by ctopper, committed by ).

Changed prior to commit:
  https://reviews.llvm.org/D64699?vs=209757&id=209914#toc

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D64699/new/

https://reviews.llvm.org/D64699

Files:
  llvm/trunk/lib/Target/X86/X86ISelLowering.cpp


Index: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
===================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
@@ -25033,8 +25033,11 @@
   APInt APIntShiftAmt;
   if (!isConstantSplat(Amt, APIntShiftAmt))
     return SDValue();
-  assert(APIntShiftAmt.ult(VT.getScalarSizeInBits()) &&
-         "Out of range shift amount");
+
+  // If the shift amount is out of range, return undef.
+  if (APIntShiftAmt.uge(VT.getScalarSizeInBits()))
+    return DAG.getUNDEF(VT);
+
   uint64_t ShiftAmt = APIntShiftAmt.getZExtValue();
 
   if (SupportedVectorShiftWithImm(VT, Subtarget, Op.getOpcode()))


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