[clang] [flang] [llvm] Add IR Profile-Guided Optimization (IR PGO) support to the Flang compiler (PR #136098)

[Arthur Eubanks via cfe-commits]

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@@ -130,6 +133,20 @@ static bool saveMLIRTempFile(const CompilerInvocation &ci,
 // Custom BeginSourceFileAction
 //===----------------------------------------------------------------------===//
 
+
+static llvm::cl::opt<llvm::PGOOptions::ColdFuncOpt> ClPGOColdFuncAttr(
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aeubanks wrote:

sorry, I missed this, yeah promoting this to a proper frontend option is fine

https://github.com/llvm/llvm-project/pull/136098