From 5c5a71428a93fb225f0057790f41697fe2a0df92 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Wed, 19 Aug 2026 17:25:55 +0800
Subject: [CodeGen] Remove non-LLVM machine DCE placements

---
 backend/lib/CodeGen/MachineOptimizationPipeline.cpp | 6 ------
 1 file changed, 6 deletions(-)

(limited to 'backend/lib')

diff --git a/backend/lib/CodeGen/MachineOptimizationPipeline.cpp b/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
index f3ce86d..817b2ca 100644
--- a/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
+++ b/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
@@ -74,9 +74,6 @@ Expected<void> addPreRegisterAllocationOptimizationPipeline(
     return std::unexpected(Added.error());
   Added = addPass<MachineCombinerPass>(Pipeline, TargetInfo.Combiner,
                                        MachineCombinerStage::PreRegisterAllocation);
-  if (!Added)
-    return std::unexpected(Added.error());
-  Added = addPass<MachineDCEPass>(Pipeline);
   if (!Added)
     return std::unexpected(Added.error());
   return addPass<MachineSchedulerPass>(Pipeline, TargetInfo.SchedulingModel);
@@ -103,9 +100,6 @@ addPostRegisterAllocationPipeline(MachineFunctionPassManager &Pipeline,
   if (!Added)
     return std::unexpected(Added.error());
   Added = addPass<PrologueEpilogueInsertionPass>(Pipeline, TargetInfo.FrameLowering);
-  if (!Added)
-    return std::unexpected(Added.error());
-  Added = addPass<MachineDCEPass>(Pipeline);
   if (!Added)
     return std::unexpected(Added.error());
   Added = addPass<ExpandPostRAPseudosPass>(Pipeline, TargetInfo.PseudoExpansion);
-- 
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