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

[Akira Hatanaka 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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ahatanak wrote:

If we used a C++ constant, wouldn't it be harder to make a compile time constant string (e.g., `^__llvm_verbose_trap: `)?

https://github.com/llvm/llvm-project/pull/80368/files#diff-e87fc223a3fc5310a2dc415999059d623bb89cd10f03324ac4c4496cd7f5419f

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