[llvm] [CodeGen] Simplify code with *Map::operator[] (NFC) (PR #112075)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-selectiondag

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/112075.diff


2 Files Affected:

- (modified) llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (+1-2) 
- (modified) llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp (+1-2) 


``````````diff
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 27931e118504b9..10736305762d21 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -630,8 +630,7 @@ static void finishCallSiteParams(ValT Val, const DIExpression *Expr,
 static void addToFwdRegWorklist(FwdRegWorklist &Worklist, unsigned Reg,
                                 const DIExpression *Expr,
                                 ArrayRef<FwdRegParamInfo> ParamsToAdd) {
-  auto I = Worklist.insert({Reg, {}});
-  auto &ParamsForFwdReg = I.first->second;
+  auto &ParamsForFwdReg = Worklist[Reg];
   for (auto Param : ParamsToAdd) {
     assert(none_of(ParamsForFwdReg,
                    [Param](const FwdRegParamInfo &D) {
diff --git a/llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp b/llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
index 6a6bc19314d5b6..374f23099a9080 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
@@ -120,8 +120,7 @@ void FunctionLoweringInfo::set(const Function &fn, MachineFunction &mf,
     for (WinEHTryBlockMapEntry &TBME : EHInfo.TryBlockMap) {
       for (WinEHHandlerType &H : TBME.HandlerArray) {
         if (const AllocaInst *AI = H.CatchObj.Alloca)
-          CatchObjects.insert({AI, {}}).first->second.push_back(
-              &H.CatchObj.FrameIndex);
+          CatchObjects[AI].push_back(&H.CatchObj.FrameIndex);
         else
           H.CatchObj.FrameIndex = INT_MAX;
       }

``````````

</details>


https://github.com/llvm/llvm-project/pull/112075