[NOT FOR COMMIT] Avoid entry_val ops with callee clobbered regs in call_value

[djtodoro]

Summary

Addresses wrong call_value generated within case from PR39716.

(not sure if this is valid patch ...)

[djtodoro]

will make right fix for this (coming soon)

llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp

if (!interpretNextInstr(&*I, ForwardedRegWorklist, Params))
       return;
   }
 
   // Emit the call site parameter's value as an entry value.
   if (ShouldTryEmitEntryVals) {
     // Create an expression where the register's entry value is used.
     DIExpression *EntryExpr = DIExpression::get(
         MF->getFunction().getContext(), {dwarf::DW_OP_LLVM_entry_value, 1});
+    const auto &TRI = *MF->getSubtarget().getRegisterInfo();
     for (auto RegEntry : ForwardedRegWorklist) {
+      if (TRI.isCalleeSavedPhysReg(RegEntry.first, *MF)) {
         MachineLocation MLoc(RegEntry.first);
         finishCallSiteParams(MLoc, EntryExpr, RegEntry.second, Params);
       }
     }
   }
+}
 
 void DwarfDebug::constructCallSiteEntryDIEs(const DISubprogram &SP,
                                             DwarfCompileUnit &CU, DIE &ScopeDIE,
                                             const MachineFunction &MF) {
   // Add a call site-related attribute (DWARF5, Sec. 3.3.1.3). Do this only if
   // the subprogram is required to have one.
   if (!SP.areAllCallsDescribed() || !SP.isDefinition())
     return;