From f6fdfb8d484b4e52cdb24a94a31b0f00d41a5eb7 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sat, 15 Aug 2026 00:38:20 +0800
Subject: [GlobalISel] Match LLVM CSE builder result semantics

---
 backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h')

diff --git a/backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h b/backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h
index 0fdc89f..ece0793 100644
--- a/backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h
+++ b/backend/include/rcc/CodeGen/GlobalISel/LegalizerHelper.h
@@ -70,6 +70,10 @@ private:
                                                   LowLevelType NarrowType);
   [[nodiscard]] Expected<void> narrowScalarExt(MachineInstr &Instruction, std::size_t TypeIndex,
                                                LowLevelType NarrowType);
+  [[nodiscard]] Expected<void> widenScalarAddSubOverflow(MachineInstr &Instruction,
+                                                         std::size_t TypeIndex,
+                                                         LowLevelType WideType);
+  [[nodiscard]] Expected<void> lowerSignedAddSubOverflow(MachineInstr &Instruction);
 
   MachineFunction &Function;
   MachineRegisterInfo &MRI;
-- 
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