Ensure KnownBits passed when calculating from range md has right size

llvm/lib/Analysis/ValueTracking.cpp

@@ -433,6 +433,10 @@ void llvm::computeKnownBitsFromRangeMetadata(const MDNode &Ranges,
     // The first CommonPrefixBits of all values in Range are equal.
     unsigned CommonPrefixBits =
         (Range.getUnsignedMax() ^ Range.getUnsignedMin()).countl_zero();
+    // BitWidth must equal the Ranges BitWidth for the correct number of high
+    // bits to be set.
+    assert(BitWidth == Lower->getBitWidth() &&
+           "Known bit width must match range bit width!");
     APInt Mask = APInt::getHighBitsSet(BitWidth, CommonPrefixBits);
     APInt UnsignedMax = Range.getUnsignedMax().zextOrTrunc(BitWidth);
     Known.One &= UnsignedMax & Mask;

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -9176,6 +9176,12 @@ SDValue SelectionDAG::getLoad(ISD::MemIndexedMode AM, ISD::LoadExtType ExtType,
            "Cannot use an ext load to change the number of vector elements!");
   }
 
+  assert((!MMO->getRanges() ||
+          (mdconst::extract<ConstantInt>(MMO->getRanges()->getOperand(0))
+                   ->getBitWidth() == MemVT.getScalarSizeInBits() &&
+           MemVT.isInteger())) &&
+         "Range metadata and load type must match!");
+
   bool Indexed = AM != ISD::UNINDEXED;
   assert((Indexed || Offset.isUndef()) && "Unindexed load with an offset!");