[AsmPrinter] Avoid repeated hash lookups (NFC) (#128995)

kazutakahirata · web-flow · commit c54e6fb5c868 · 2025-02-27T01:45:19.000-08:00
diff --git a/llvm/lib/CodeGen/AsmPrinter/DbgEntityHistoryCalculator.cpp b/llvm/lib/CodeGen/AsmPrinter/DbgEntityHistoryCalculator.cpp
@@ -401,10 +401,9 @@ static void handleNewDebugValue(InlinedEntity Var, const MachineInstr &DV,
       for (const MachineOperand &Op : DV.debug_operands()) {
         if (Op.isReg() && Op.getReg()) {
           Register NewReg = Op.getReg();
-          if (!TrackedRegs.count(NewReg))
+          if (TrackedRegs.insert_or_assign(NewReg, true).second)
             addRegDescribedVar(RegVars, NewReg, Var);
           LiveEntries[Var].insert(NewIndex);
-          TrackedRegs[NewReg] = true;
         }
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -401,10 +401,9 @@ static void handleNewDebugValue(InlinedEntity Var, const MachineInstr &DV,`
`401`	`401`	`for (const MachineOperand &Op : DV.debug_operands()) {`
`402`	`402`	`if (Op.isReg() && Op.getReg()) {`
`403`	`403`	`Register NewReg = Op.getReg();`
`404`		`- if (!TrackedRegs.count(NewReg))`
	`404`	`+ if (TrackedRegs.insert_or_assign(NewReg, true).second)`
`405`	`405`	`addRegDescribedVar(RegVars, NewReg, Var);`
`406`	`406`	`LiveEntries[Var].insert(NewIndex);`
`407`		`- TrackedRegs[NewReg] = true;`
`408`	`407`	`}`
`409`	`408`	`}`
`410`	`409`	`}`