[llvm] DynamicAPInt: Support APInt constructor. (PR #146301)

[Nikita Popov via llvm-commits]

================
@@ -116,6 +117,14 @@ class DynamicAPInt {
       : ValSmall(Val) {
     ValLarge.Val.BitWidth = 0;
   }
+  LLVM_ATTRIBUTE_ALWAYS_INLINE explicit DynamicAPInt(const APInt &Val) {
+    if (Val.getBitWidth() < 64) {
----------------
nikic wrote:

```suggestion
    if (Val.getBitWidth() <= 64) {
```

https://github.com/llvm/llvm-project/pull/146301