[clang] [clang-tools-extra] [compiler-rt] [PGO] Exposing PGO's Counter Reset and File Dumping APIs (PR #76471)

[Snehasish Kumar via llvm-commits]

================
@@ -1364,12 +1364,22 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
   TI.getTargetDefines(LangOpts, Builder);
 }
 
+static void InitializePGOProfileMacros(const CodeGenOptions &CodeGenOpts,
+                                       MacroBuilder &Builder) {
+  if (CodeGenOpts.hasProfileInstr())
+    Builder.defineMacro("__LLVM_INSTR_PROFILE_GENERATE");
----------------
snehasish wrote:

We should document these macros in the clang documentation at https://clang.llvm.org/docs/UsersManual.html#profiling-with-instrumentation 

https://github.com/llvm/llvm-project/pull/76471