[ADT] Deprecate a soft-deprecated APInt constructor (llvm#166314)

This patch deprecates an APInt constructor that has been
soft-deprecated via comments since:

  commit 7a16288
  Author: Jeffrey Yasskin <[email protected]>
  Date:   Mon Jul 18 21:45:40 2011 +0000

This patch updates a small number of remaining uses.

Author: kazutakahirata

lldb/source/Utility/RegisterValue.cpp

@@ -206,7 +206,7 @@ Status RegisterValue::SetValueFromData(const RegisterInfo &reg_info,
         int128.x[0] = data2;
         int128.x[1] = data1;
       }
-      SetUInt128(llvm::APInt(128, 2, int128.x));
+      SetUInt128(llvm::APInt(128, int128.x));
     }
     break;
   case eEncodingIEEE754:
@@ -596,8 +596,10 @@ llvm::APInt RegisterValue::GetAsUInt128(const llvm::APInt &fail_value,
     case 8:
     case 16:
       return llvm::APInt(
-          BITWIDTH_INT128, NUM_OF_WORDS_INT128,
-          (reinterpret_cast<const type128 *>(buffer.bytes.data()))->x);
+          BITWIDTH_INT128,
+          llvm::ArrayRef(
+              (reinterpret_cast<const type128 *>(buffer.bytes.data()))->x,
+              NUM_OF_WORDS_INT128));
     }
   } break;
   }

llvm/include/llvm/ADT/APInt.h

@@ -154,6 +154,7 @@ class [[nodiscard]] APInt {
   /// Once all uses of this constructor are migrated to other constructors,
   /// consider marking this overload ""= delete" to prevent calls from being
   /// incorrectly bound to the APInt(unsigned, uint64_t, bool) constructor.
+  [[deprecated("Use other constructors of APInt")]]
   LLVM_ABI APInt(unsigned numBits, unsigned numWords, const uint64_t bigVal[]);
 
   /// Construct an APInt from a string representation.

polly/lib/Support/GICHelper.cpp

@@ -59,7 +59,7 @@ APInt polly::APIntFromVal(__isl_take isl_val *Val) {
   Data = (uint64_t *)malloc(NumChunks * ChunkSize);
   isl_val_get_abs_num_chunks(Val, ChunkSize, Data);
   int NumBits = CHAR_BIT * ChunkSize * NumChunks;
-  APInt A(NumBits, NumChunks, Data);
+  APInt A(NumBits, ArrayRef(Data, NumChunks));
 
   // As isl provides only an interface to obtain data that describes the
   // absolute value of an isl_val, A at this point always contains a positive