[clang] [llvm] [llvm:ir] Add support for constant data exceeding 4GiB (PR #126481)

[Eli Friedman via llvm-commits]

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@@ -364,13 +364,13 @@ bool ConstantAggregateBuilder::split(size_t Index, CharUnits Hint) {
     // FIXME: If possible, split into two ConstantDataSequentials at Hint.
     CharUnits ElemSize = getSize(CDS->getElementType());
     replace(Elems, Index, Index + 1,
-            llvm::map_range(llvm::seq(0u, CDS->getNumElements()),
+            llvm::map_range(llvm::seq(uint64_t(0u), CDS->getNumElements()),
                             [&](unsigned Elem) {
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efriedma-quic wrote:

```suggestion
                            [&](uint64_t Elem) {
```

https://github.com/llvm/llvm-project/pull/126481