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

[Dan Liew via cfe-commits]

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@@ -3452,6 +3452,18 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
   case Builtin::BI__builtin_trap:
     EmitTrapCall(Intrinsic::trap);
     return RValue::get(nullptr);
+  case Builtin::BI__builtin_verbose_trap: {
+    llvm::DILocation *TrapLocation = Builder.getCurrentDebugLocation();
+    if (getDebugInfo()) {
+      std::string Str;
+      E->getArg(0)->tryEvaluateString(Str, getContext());
+      TrapLocation =
+          getDebugInfo()->CreateTrapFailureMessageFor(TrapLocation, Str);
+    }
+    ApplyDebugLocation ApplyTrapDI(*this, TrapLocation);
+    EmitTrapCall(Intrinsic::trap);
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delcypher wrote:

Please leave a comment in the code indicating that currently no attempt is made to prevent traps being merged.

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