[ValueTracking] Use switch for Intrinsics in `isKnownToBePowerOfTwo`; NFC

[nikic]

LGTM

[goldstein.w.n]

Rebase

[goldstein.w.n]

Rebase

llvm/lib/Analysis/ValueTracking.cpp

return llvm::all_of(PN->operands(), [&](const Use &U) {
         return true;
 
       // Change the context instruction to the incoming block where it is
       // evaluated.
       RecQ.CxtI = PN->getIncomingBlock(U)->getTerminator();
       return isKnownToBeAPowerOfTwo(U.get(), OrZero, NewDepth, RecQ);
     });
   }
+  case Instruction::Invoke:
   case Instruction::Call: {
-    Value *X, *Y;
-    if (match(I, m_MaxOrMin(m_Value(X), m_Value(Y))))
-      return isKnownToBeAPowerOfTwo(X, OrZero, Depth, Q) &&
-             isKnownToBeAPowerOfTwo(Y, OrZero, Depth, Q);
+    if (auto *II = dyn_cast<IntrinsicInst>(I)) {
+      switch (II->getIntrinsicID()) {
+      case Intrinsic::umax:
+      case Intrinsic::smax:
+      case Intrinsic::umin:
+      case Intrinsic::smin:
+        return isKnownToBeAPowerOfTwo(II->getArgOperand(1), OrZero, Depth, Q) &&
+               isKnownToBeAPowerOfTwo(II->getArgOperand(0), OrZero, Depth, Q);
+      default:
+        break;
+      }
+    }
     return false;
   }
   default:
     return false;
   }
 }
 
 /// Test whether a GEP's result is known to be non-null.