[clang] Add support for builtin_verbose_trap (PR #79230)

[David Blaikie via cfe-commits]

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@@ -27,6 +27,9 @@ namespace llvm {
   }
 }
 
+// Prefix for __builtin_verbose_trap.
+#define CLANG_VERBOSE_TRAP_PREFIX "__llvm_verbose_trap"
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dwblaikie wrote:

& not sure it being a compile time constant regex is super important - the regex compilation probably dwarfs the string concatenation required to add the `^` and `:`? 

https://github.com/llvm/llvm-project/pull/79230