From 0bb35fa2306a66f1f0baf118619b5c1640ed9c01 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Wed, 12 Aug 2026 21:56:37 +0800
Subject: [GlobalISel] Split the generic pipeline components

---
 backend/include/rcc/CodeGen/TargetCodeGen.h | 95 -----------------------------
 1 file changed, 95 deletions(-)
 delete mode 100644 backend/include/rcc/CodeGen/TargetCodeGen.h

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

diff --git a/backend/include/rcc/CodeGen/TargetCodeGen.h b/backend/include/rcc/CodeGen/TargetCodeGen.h
deleted file mode 100644
index 65f65a4..0000000
--- a/backend/include/rcc/CodeGen/TargetCodeGen.h
+++ /dev/null
@@ -1,95 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#ifndef RCC_CODEGEN_TARGETCODEGEN_H
-#define RCC_CODEGEN_TARGETCODEGEN_H
-
-#include "rcc/Support/Error.h"
-
-#include <cstdint>
-
-namespace rcc {
-
-class MachineFunction;
-class MachineInstr;
-class TargetDescription;
-struct VirtualRegisterInfo;
-
-enum class LegalizationAction : std::uint8_t {
-  Legal,
-  Unsupported,
-  Custom,
-  Lower,
-  Libcall,
-  WidenScalar,
-  NarrowScalar,
-  MoreElements,
-  FewerElements,
-  Bitcast,
-  ChangeElementType,
-  ChangeAddressSpace,
-};
-
-class TargetLegalizerInfo {
-public:
-  virtual ~TargetLegalizerInfo() = default;
-
-  [[nodiscard]] virtual Expected<LegalizationAction>
-  classify(const MachineInstr &Instruction, const MachineFunction &Function,
-           const TargetDescription &Target) const = 0;
-
-  [[nodiscard]] virtual Expected<void> lower(MachineInstr &Instruction, MachineFunction &Function,
-                                             const TargetDescription &Target,
-                                             LegalizationAction Action) const = 0;
-
-  // This hook performs read-only target checks before a lowering mutation is committed.
-  [[nodiscard]] virtual Expected<void> validateLowering(const MachineInstr &,
-                                                        const MachineFunction &,
-                                                        const TargetDescription &,
-                                                        LegalizationAction) const {
-    return {};
-  }
-};
-
-class TargetRegisterBankInfo {
-public:
-  virtual ~TargetRegisterBankInfo() = default;
-
-  [[nodiscard]] virtual Expected<RegisterBankID>
-  selectBank(const MachineFunction &Function, Register Reg, const VirtualRegisterInfo &Info,
-             const MachineInstr *Context, const TargetDescription &Target) const = 0;
-
-  [[nodiscard]] virtual Expected<void>
-  constrainInstruction(MachineInstr &Instruction, MachineFunction &Function,
-                       const TargetDescription &Target) const = 0;
-
-  // This hook must not mutate MachineIR. It allows the pass to reject a bad mapping
-  // before publishing any bank or class assignment.
-  [[nodiscard]] virtual Expected<void> validateInstruction(const MachineInstr &,
-                                                           const MachineFunction &,
-                                                           const TargetDescription &) const {
-    return {};
-  }
-};
-
-class TargetInstructionSelector {
-public:
-  virtual ~TargetInstructionSelector() = default;
-
-  [[nodiscard]] virtual Expected<void> select(MachineInstr &Instruction, MachineFunction &Function,
-                                              const TargetDescription &Target) const = 0;
-
-  // Selection matching is read-only and must complete before select() mutates MachineIR.
-  [[nodiscard]] virtual Expected<void> canSelect(const MachineInstr &, const MachineFunction &,
-                                                 const TargetDescription &) const {
-    return {};
-  }
-
-  [[nodiscard]] virtual Expected<void>
-  constrainSelectedInstruction(MachineInstr &, MachineFunction &, const TargetDescription &) const {
-    return {};
-  }
-};
-
-} // namespace rcc
-
-#endif // RCC_CODEGEN_TARGETCODEGEN_H
-- 
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