[clang] [flang] [flang][flang-driver] Support flag -finstrument-functions (PR #137996)

[Anchu Rajendran S via cfe-commits]

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@@ -124,6 +128,8 @@ struct MLIRToLLVMPassPipelineConfig : public FlangEPCallBacks {
   bool UnsafeFPMath = false; ///< Set unsafe-fp-math attribute for functions.
   bool NSWOnLoopVarInc = true; ///< Add nsw flag to loop variable increments.
   bool EnableOpenMP = false; ///< Enable OpenMP lowering.
+  std::string InstrumentFunctionsEntry = "";
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anchuraj wrote:

Thank you for the review. I missed adding the description . Will update it.

https://github.com/llvm/llvm-project/pull/137996