[llvm] [ValueTracking] NFC: Allow tracking values through AddrSpaceCasts (PR #70483)

[Matt Arsenault via llvm-commits]

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@@ -1775,6 +1782,28 @@ static void computeKnownBitsFromOperator(const Operator *I,
                                   Depth + 1))
       computeKnownBits(I->getOperand(0), Known, Depth + 1, Q);
     break;
+  case Instruction::AddrSpaceCast: {
+    auto ASC = dyn_cast<AddrSpaceCastOperator>(I);
+    assert(ASC);
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arsenm wrote:

just use cast<>

https://github.com/llvm/llvm-project/pull/70483