From b7cb5381e520a25e8f0f465903d8eea1972761c2 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Thu, 27 Aug 2026 15:53:10 +0800
Subject: [CodeGen] Run machine optimizations once

---
 backend/lib/CodeGen/MachineBranchOptimization.cpp | 19 +------------------
 1 file changed, 1 insertion(+), 18 deletions(-)

(limited to 'backend/lib/CodeGen/MachineBranchOptimization.cpp')

diff --git a/backend/lib/CodeGen/MachineBranchOptimization.cpp b/backend/lib/CodeGen/MachineBranchOptimization.cpp
index e03b0d9..6e3bc17 100644
--- a/backend/lib/CodeGen/MachineBranchOptimization.cpp
+++ b/backend/lib/CodeGen/MachineBranchOptimization.cpp
@@ -8,7 +8,6 @@
 #include "rcc/CodeGen/MachineBasicBlockAttributes.h"
 #include "rcc/CodeGen/MachineCFGUpdater.h"
 #include "rcc/CodeGen/MachineFunction.h"
-#include "rcc/CodeGen/MachineFunctionCloner.h"
 #include "rcc/CodeGen/MachineFunctionRecords.h"
 #include "rcc/CodeGen/MachineInstr.h"
 #include "rcc/CodeGen/MachineJumpTableInfo.h"
@@ -21,7 +20,6 @@
 #include <algorithm>
 #include <cstddef>
 #include <cstdint>
-#include <optional>
 #include <ranges>
 #include <string>
 #include <unordered_set>
@@ -581,22 +579,7 @@ const MachinePassContract &MachineBranchOptimizationPass::contract() const noexc
 Expected<MachinePassResult> MachineBranchOptimizationPass::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(), "branch optimization 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(), "branch optimization diverged after a successful transaction preflight: "));
-  }
-  return Result;
+  return runImplementation(Function, Target);
 }
 
 Expected<MachinePassResult>
-- 
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