From 936ac5647f82def050e6654d44d24a88906f4d7a Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Mon, 24 Aug 2026 16:18:45 +0800
Subject: [CodeGen] Implement RISC-V peephole branch optimization

---
 backend/lib/CodeGen/MachineOptimizationPipeline.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

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

diff --git a/backend/lib/CodeGen/MachineOptimizationPipeline.cpp b/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
index adec384..2badb78 100644
--- a/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
+++ b/backend/lib/CodeGen/MachineOptimizationPipeline.cpp
@@ -14,6 +14,7 @@
 #include "rcc/CodeGen/MachineFinalization.h"
 #include "rcc/CodeGen/MachineLICM.h"
 #include "rcc/CodeGen/MachineMemoryFolding.h"
+#include "rcc/CodeGen/MachinePeepholeOptimizer.h"
 #include "rcc/CodeGen/MachinePseudoExpansion.h"
 #include "rcc/CodeGen/MachineScheduler.h"
 #include "rcc/CodeGen/MachineShrinkWrapping.h"
@@ -62,7 +63,13 @@ addSelectedSSAOptimizationPipeline(MachineFunctionPassManager &Pipeline,
   Added = addPass<MachineLICMPass>(Pipeline, MachineCodeMotionStage::SelectedSSA);
   if (!Added)
     return std::unexpected(Added.error());
-  return addPass<MachineSinkPass>(Pipeline, MachineCodeMotionStage::SelectedSSA);
+  Added = addPass<MachineSinkPass>(Pipeline, MachineCodeMotionStage::SelectedSSA);
+  if (!Added)
+    return std::unexpected(Added.error());
+  Added = addPass<MachinePeepholeOptimizerPass>(Pipeline, TargetInfo.InstrInfo);
+  if (!Added)
+    return std::unexpected(Added.error());
+  return addPass<MachineDCEPass>(Pipeline);
 }
 
 Expected<void> addPreRegisterAllocationOptimizationPipeline(
-- 
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