From 4f7b41c3c711d6c6fa4e422f3eec8961c91eea7a Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sun, 16 Aug 2026 15:39:45 +0800
Subject: tablegen: Generate GlobalISel match tables

---
 backend/utils/TableGen/Common/CodeGenTarget.h | 41 +++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'backend/utils/TableGen/Common/CodeGenTarget.h')

diff --git a/backend/utils/TableGen/Common/CodeGenTarget.h b/backend/utils/TableGen/Common/CodeGenTarget.h
index cbddd4a..929d3e7 100644
--- a/backend/utils/TableGen/Common/CodeGenTarget.h
+++ b/backend/utils/TableGen/Common/CodeGenTarget.h
@@ -163,6 +163,45 @@ struct NormalizedInstruction final {
   std::string Deadline;
 };
 
+enum class NormalizedSelectionTypeKind : std::uint8_t {
+  Any,
+  Scalar,
+  Pointer,
+};
+
+struct NormalizedSelectionTypePredicate final {
+  NormalizedSelectionTypeKind Kind = NormalizedSelectionTypeKind::Any;
+  std::uint32_t Bits = 0;
+};
+
+struct NormalizedSelectionOperandTypePredicate final {
+  std::uint32_t OperandIndex = 0;
+  NormalizedSelectionTypePredicate Type;
+};
+
+struct NormalizedSelectionOperandBankPredicate final {
+  std::uint32_t OperandIndex = 0;
+  std::uint32_t Bank = 0;
+};
+
+struct NormalizedSelectionOperandClassPredicate final {
+  std::uint32_t OperandIndex = 0;
+  std::uint32_t RegClass = 0;
+};
+
+struct NormalizedSelectionRule final {
+  std::string Symbol;
+  std::uint32_t Priority = 0;
+  std::uint32_t Specificity = 0;
+  std::uint32_t MatchOpcode = 0;
+  std::optional<NormalizedSelectionTypePredicate> ResultType;
+  std::vector<NormalizedSelectionOperandTypePredicate> OperandTypes;
+  std::vector<NormalizedSelectionOperandBankPredicate> OperandBanks;
+  std::vector<NormalizedSelectionOperandClassPredicate> OperandClasses;
+  std::uint32_t ResultOpcode = 0;
+  std::vector<std::int64_t> AppendedImmediates;
+};
+
 struct NormalizedTargetModel final {
   SourceTarget Target;
   std::vector<SourceRegisterUnit> RegisterUnits;
@@ -178,6 +217,7 @@ struct NormalizedTargetModel final {
   std::vector<NormalizedEncodingCategory> EncodingCategories;
   std::vector<NormalizedAssemblyFormat> AssemblyFormats;
   std::vector<NormalizedInstruction> Instructions;
+  std::vector<NormalizedSelectionRule> SelectionRules;
 };
 
 [[nodiscard]] std::optional<std::string_view>
@@ -219,6 +259,7 @@ private:
   normalizeImplicitRegisters(const std::vector<SourceImplicitRegister> &InputRegisters, bool IsDef,
                              std::vector<NormalizedImplicitRegister> &Result);
   [[nodiscard]] bool normalizeInstructions(NormalizedTargetModel &Result);
+  [[nodiscard]] bool normalizeSelectionRules(NormalizedTargetModel &Result);
 
   const DescriptionAST &Input;
   std::string SourceName;
-- 
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