[llvm] [PowerPC] Avoid repeated hash lookups (NFC) (PR #129193)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-powerpc

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/129193.diff


1 Files Affected:

- (modified) llvm/lib/Target/PowerPC/PPCInstrInfo.cpp (+2-2) 


``````````diff
diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
index 9b526066fe75b..f12400490832b 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -5427,8 +5427,8 @@ void PPCInstrInfo::promoteInstr32To64ForElimEXTSW(const Register &Reg,
   --Iter;
   MachineInstrBuilder MIBuilder(*Iter->getMF(), Iter);
   for (unsigned i = 1; i < MI->getNumOperands(); i++) {
-    if (PromoteRegs.find(i) != PromoteRegs.end())
-      MIBuilder.addReg(PromoteRegs[i], RegState::Kill);
+    if (auto It = PromoteRegs.find(i); It != PromoteRegs.end())
+      MIBuilder.addReg(It->second, RegState::Kill);
     else
       Iter->addOperand(MI->getOperand(i));
   }

``````````

</details>


https://github.com/llvm/llvm-project/pull/129193