[llvm] [AMDGPU] Improve StructurizeCFG pass performance: avoid redundant DebugLoc map initialization. NFC. (PR #130568)

[Valery Pykhtin via llvm-commits]

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@@ -990,10 +996,13 @@ BasicBlock *StructurizeCFG::getNextFlow(BasicBlock *Dominator) {
                                         Func, Insert);
   FlowSet.insert(Flow);
 
-  // use a temporary variable to avoid a use-after-free if the map's storage is
-  // reallocated
-  DebugLoc DL = TermDL[Dominator];
-  TermDL[Flow] = std::move(DL);
+  if (auto *Term = Dominator->getTerminator()) {
+    if (const DebugLoc &DL = Term->getDebugLoc())
+      TermDL[Flow] = DL;
+  } else if (DebugLoc DLTemp = TermDL.lookup(Dominator))
+    // use a temporary variable to avoid a use-after-free if the map's storage
+    // is reallocated
+    TermDL[Flow] = DLTemp;
 
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vpykhtin wrote:

Thanks, done

https://github.com/llvm/llvm-project/pull/130568