From 2623df180b9e86512fe69b8f90563fbd8add89c3 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Fri, 28 Aug 2026 23:59:37 +0800
Subject: [CodeGen] Complete LaneMask bitwise operations

---
 backend/lib/CodeGen/LiveIntervals.cpp | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

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

diff --git a/backend/lib/CodeGen/LiveIntervals.cpp b/backend/lib/CodeGen/LiveIntervals.cpp
index 5a01693..dc25af8 100644
--- a/backend/lib/CodeGen/LiveIntervals.cpp
+++ b/backend/lib/CodeGen/LiveIntervals.cpp
@@ -23,10 +23,6 @@
 namespace rcc {
 
 namespace {
-[[nodiscard]] LaneMask subtractLanes(LaneMask Left, LaneMask Right) noexcept {
-  return LaneMask::fromRaw(Left.rawValue() & ~Right.rawValue());
-}
-
 [[nodiscard]] bool maskIntersects(LaneMask Access, std::optional<LaneMask> Filter) noexcept {
   return !Filter || Access.intersects(*Filter);
 }
@@ -242,7 +238,7 @@ partitionVirtualRegisterLanes(Register Reg, MachineFunction &Function,
     std::vector<LaneMask> Refined;
     for (const LaneMask Group : Groups) {
       const LaneMask Intersection = Group & Access;
-      const LaneMask Difference = subtractLanes(Group, Access);
+      const LaneMask Difference = Group & ~Access;
       if (!Intersection.empty())
         Refined.push_back(Intersection);
       if (!Difference.empty())
-- 
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