[llvm] [Hexagon] Avoid repeated map lookups (NFC) (PR #127304)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-hexagon

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/127304.diff


1 Files Affected:

- (modified) llvm/lib/Target/Hexagon/RDFCopy.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Target/Hexagon/RDFCopy.cpp b/llvm/lib/Target/Hexagon/RDFCopy.cpp
index fdd7e4cf99e35..fafdad08909dd 100644
--- a/llvm/lib/Target/Hexagon/RDFCopy.cpp
+++ b/llvm/lib/Target/Hexagon/RDFCopy.cpp
@@ -133,8 +133,8 @@ bool CopyPropagation::run() {
     for (NodeId I : Copies) {
       dbgs() << "Instr: " << *DFG.addr<StmtNode*>(I).Addr->getCode();
       dbgs() << "   eq: {";
-      if (CopyMap.count(I)) {
-        for (auto J : CopyMap.at(I))
+      if (auto It = CopyMap.find(I); It != CopyMap.end()) {
+        for (auto J : It->second)
           dbgs() << ' ' << Print<RegisterRef>(J.first, DFG) << '='
                  << Print<RegisterRef>(J.second, DFG);
       }

``````````

</details>


https://github.com/llvm/llvm-project/pull/127304