From 3341938bb644e6fc39afa6a8fcb1306604999e42 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Wed, 12 Aug 2026 22:37:49 +0800
Subject: [RISCV] Split the GlobalISel target components

---
 backend/lib/Target/RISCV/RISCVSubtarget.cpp | 34 +++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

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

diff --git a/backend/lib/Target/RISCV/RISCVSubtarget.cpp b/backend/lib/Target/RISCV/RISCVSubtarget.cpp
index 3a3d9e2..89f6c61 100644
--- a/backend/lib/Target/RISCV/RISCVSubtarget.cpp
+++ b/backend/lib/Target/RISCV/RISCVSubtarget.cpp
@@ -2,6 +2,12 @@
 
 #include "rcc/Target/RISCV/RISCVSubtarget.h"
 
+#include "GISel/RISCVCallLowering.h"
+#include "GISel/RISCVLegalizerInfo.h"
+#include "GISel/RISCVRegisterBankInfo.h"
+#include "RISCV.h"
+#include "rcc/CodeGen/GlobalISel/InstructionSelector.h"
+
 #include <array>
 #include <cstddef>
 #include <string_view>
@@ -91,4 +97,32 @@ bool RISCVSubtargetFeatures::has(RISCVExtension Extension) const noexcept {
   return (Enabled & extensionBit(Extension)) != 0;
 }
 
+RISCVSubtarget::RISCVSubtarget(RISCVSubtargetFeatures Features) : Features(Features) {}
+
+RISCVSubtarget::~RISCVSubtarget() = default;
+
+const TargetCallLowering *RISCVSubtarget::getCallLowering() const {
+  if (!CallLoweringInfo)
+    CallLoweringInfo = std::make_unique<RISCVCallLowering>();
+  return CallLoweringInfo.get();
+}
+
+InstructionSelector *RISCVSubtarget::getInstructionSelector() const {
+  if (!InstSelector)
+    InstSelector.reset(createRISCVInstructionSelector(*this, *getRegBankInfo()));
+  return InstSelector.get();
+}
+
+const LegalizerInfo *RISCVSubtarget::getLegalizerInfo() const {
+  if (!Legalizer)
+    Legalizer = std::make_unique<RISCVLegalizerInfo>(*this);
+  return Legalizer.get();
+}
+
+const RISCVRegisterBankInfo *RISCVSubtarget::getRegBankInfo() const {
+  if (!RegBankInfo)
+    RegBankInfo = std::make_unique<RISCVRegisterBankInfo>();
+  return RegBankInfo.get();
+}
+
 } // namespace rcc::riscv
-- 
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