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

[Dan Liew via cfe-commits]

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@@ -1628,6 +1628,25 @@ llvm::DIType *CGDebugInfo::createFieldType(
                                    offsetInBits, flags, debugType, Annotations);
 }
 
+llvm::DISubprogram *
+CGDebugInfo::createInlinedTrapSubprogram(StringRef FuncName,
+                                         llvm::DIFile *FileScope) {
+  llvm::DISubprogram *&SP = InlinedTrapFuncMap[FuncName];
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delcypher wrote:

I think it's worth adding a comment here explaining **why** we are caching the sub-programs.

The goal is to avoid creating duplicate sub program nodes because `llvm::DISubprogram::SPFlagDefinition` prevents unique-ing.

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