[CodeGen] Run machine optimizations once

1 files changed, 1 insertions, 18 deletions

diff --git a/backend/lib/CodeGen/MachineDCE.cpp b/backend/lib/CodeGen/MachineDCE.cpp
index 6681bc1..269999b 100644
--- a/backend/lib/CodeGen/MachineDCE.cpp
+++ b/backend/lib/CodeGen/MachineDCE.cpp
@@ -6,7 +6,6 @@
 #include "rcc/CodeGen/LiveVariables.h"
 #include "rcc/CodeGen/MachineBasicBlock.h"
 #include "rcc/CodeGen/MachineFunction.h"
-#include "rcc/CodeGen/MachineFunctionCloner.h"
 #include "rcc/CodeGen/MachineInstr.h"
 #include "rcc/CodeGen/MachineOperand.h"
 #include "rcc/CodeGen/MachineRegisterInfo.h"
@@ -111,23 +110,7 @@ const MachinePassContract &MachineDCEPass::contract() const noexcept {
 Expected<MachinePassResult> MachineDCEPass::run(MachineFunction &Function,
                                                 const TargetDescription &Target,
                                                 MachineFunctionAnalysisManager &) {
-  auto Trial = cloneMachineFunction(
-      Function, Target,
-      MachineFunctionCloneOptions{.NewStableID = Function.stableID(), .NewName = std::nullopt});
-  if (!Trial) {
-    return std::unexpected(
-        withErrorContext(Trial.error(), "machine DCE transaction setup failed: "));
-  }
-  auto TrialResult = runImplementation(*Trial->ClonedFunction, Target);
-  if (!TrialResult)
-    return std::unexpected(TrialResult.error());
-
-  auto Result = runImplementation(Function, Target);
-  if (!Result) {
-    return std::unexpected(withErrorContext(
-        Result.error(), "machine DCE diverged after a successful transaction preflight: "));
-  }
-  return Result;
+  return runImplementation(Function, Target);
 }
 
 Expected<MachinePassResult> MachineDCEPass::runImplementation(MachineFunction &Function,