[clang] [clang][Sema] Warn consecutive builtin comparisons in an expression (PR #92200)

[Vlad Serebrennikov via cfe-commits]

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@@ -85,7 +85,7 @@ void f(int x, int y, int z) {
   if ((a<y) != -1) {}// expected-warning {{comparison of constant -1 with boolean expression is always true}}
 
   if ((a<y) == z) {} // no warning
-  if (a>y<z)      {} // no warning
+  if (a>y<z)      {} // expected-warning {{comparisons like 'X<=Y<=Z' don't have their mathematical meaning}}
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Endilll wrote:

Just throwing a wording idea: `chaining of comparison operators`.

https://github.com/llvm/llvm-project/pull/92200