[clang] [llvm] [llvm][AsmPrinter] Emit call graph section (PR #87576)

[Prabhu Rajasekaran via llvm-commits]

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@@ -190,6 +190,36 @@ class LLVM_ABI AsmPrinter : public MachineFunctionPass {
   /// Emit comments in assembly output if this is true.
   bool VerboseAsm;
 
+  /// Store symbols and type identifiers used to create call graph section
+  /// entries related to a function.
+  struct FunctionInfo {
+    /// Numeric type identifier used in call graph section for indirect calls
+    /// and targets.
+    using CGTypeId = uint64_t;
+
+    /// Enumeration of function kinds, and their mapping to function kind values
+    /// stored in call graph section entries.
+    /// Must match the enum in llvm/tools/llvm-objdump/llvm-objdump.cpp.
+    enum class FunctionKind : uint64_t {
+      /// Function cannot be target to indirect calls.
+      NOT_INDIRECT_TARGET = 0,
+
+      /// Function may be target to indirect calls but its type id is unknown.
+      INDIRECT_TARGET_UNKNOWN_TID = 1,
+
+      /// Function may be target to indirect calls and its type id is known.
+      INDIRECT_TARGET_KNOWN_TID = 2,
+    };
+
+    /// Map type identifiers to callsite labels. Labels are only for indirect
+    /// calls and inclusive of all indirect calls of the function.
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Prabhuk wrote:

Reworded the inline comments. PTAL.

https://github.com/llvm/llvm-project/pull/87576