[clang] [Sema] Fix tautological bounds check warning with -fwrapv (PR #120480)

[Nathan Chancellor via cfe-commits]

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@@ -1,40 +1,72 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -fsyntax-only -DFWRAPV -fwrapv -verify %s
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nathanchance wrote:

Ah yes, that is much cleaner. Done in 8504a0d758c06fa9f3b95117fdb05021d75afe8d.

https://github.com/llvm/llvm-project/pull/120480