[llvm] [ConstantRange] Bail out early in unsignedMulMayOverflow for wide integer types (PR #192275)

[Alexis Engelke via llvm-commits]

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@@ -157,6 +157,10 @@ As a result, alignment is mandatory for atomic loads and stores.
 Other Things to Consider
 ^^^^^^^^^^^^^^^^^^^^^^^^
 
+#. Avoid emitting extremely wide integer types.
+   The optimizer is not designed for types exceeding a few thousand bits,
+   and the super-linear complexity of several passes will cause extreme compile-time delays.
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aengelke wrote:

Might be worth noting that the generated code is often sub-par as well...

https://github.com/llvm/llvm-project/pull/192275