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

[Dan Liew via cfe-commits]

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@@ -3424,6 +3443,26 @@ llvm::DIMacroFile *CGDebugInfo::CreateTempMacroFile(llvm::DIMacroFile *Parent,
   return DBuilder.createTempMacroFile(Parent, Line, FName);
 }
 
+llvm::DILocation *
+CGDebugInfo::CreateTrapFailureMessageFor(llvm::DebugLoc TrapLocation,
+                                         StringRef FailureMsg) {
+  // Create a debug location from `TrapLocation` that adds an artificial inline
+  // frame.
+  const char *Prefix = "__llvm_verbose_trap";
+  SmallString<64> FuncName(Prefix);
+  if (!FailureMsg.empty()) {
+    // A space in the function name identifies this as not being a real function
+    // because it's not a valid symbol name.
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delcypher wrote:

@adrian-prantl Sorry. This comment is based on an off-hand comment you made a while back in the context of `-fbounds-safety` (which only supports C) where I think you said having a space in the function name would distinguish the artificial function from any real function. While that's true for C I guess it's not true for other languages.

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