[llvm] [IR] Require index width to be ule pointer width (PR #70015)

[Alexander Richardson via llvm-commits]

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@@ -649,6 +649,8 @@ Error DataLayout::setPointerAlignmentInBits(uint32_t AddrSpace, Align ABIAlign,
   if (PrefAlign < ABIAlign)
     return reportError(
         "Preferred alignment cannot be less than the ABI alignment");
+  if (IndexBitWidth > TypeBitWidth)
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arichardson wrote:

I think it would be good to add tests for this: You could use the test I added in https://reviews.llvm.org/D135158?

https://github.com/llvm/llvm-project/pull/70015