From 9e89d1d718977749ca798b27b7ad45e1781602c2 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Tue, 25 Aug 2026 01:43:04 +0800
Subject: [RISCV] Implement Zcmp move merging

---
 backend/lib/Target/RISCV/RISCVPipeline.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'backend/lib/Target/RISCV/RISCVPipeline.cpp')

diff --git a/backend/lib/Target/RISCV/RISCVPipeline.cpp b/backend/lib/Target/RISCV/RISCVPipeline.cpp
index e094591..5ad7da9 100644
--- a/backend/lib/Target/RISCV/RISCVPipeline.cpp
+++ b/backend/lib/Target/RISCV/RISCVPipeline.cpp
@@ -104,6 +104,9 @@ template <typename PassT, typename... ArgumentT>
                                Options.DebugPrologueEpilogue),
       MachineOptimizationPipelineOptions{.UseTargetCopyInstructions =
                                              Options.UseTargetCopyInstructions});
+  if (!Added)
+    return std::unexpected(Added.error());
+  Added = Pipeline.addPass(createMoveMergePass(Subtarget));
   if (!Added)
     return std::unexpected(Added.error());
   return addPass<CFIInstrInserterPass>(Pipeline, Subtarget.frameLowering());
@@ -166,6 +169,8 @@ Expected<void> addCanonicalPipeline(MachineFunctionPassManager &Pipeline,
     if (!Added)
       return std::unexpected(Added.error());
   }
+  if (Subtarget.features().has(RISCVExtension::Zcmp))
+    return Pipeline.addPass(createMoveMergePass(Subtarget));
   return {};
 }
 
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