From f6a3a06de3d32eaeba1f3c8bbc5faa5ffaeb1128 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Mon, 17 Aug 2026 02:22:27 +0800
Subject: [RISCV][GlobalISel] Generate integer extension selections

---
 .../rcc/CodeGen/GlobalISel/GIMatchTableExecutor.h  |  6 +++++
 backend/include/rcc/TableGen/Record.h              | 27 ++++++++++++++++------
 backend/include/rcc/Target/RISCV/RISCVSubtarget.h  |  1 +
 3 files changed, 27 insertions(+), 7 deletions(-)

(limited to 'backend/include/rcc')

diff --git a/backend/include/rcc/CodeGen/GlobalISel/GIMatchTableExecutor.h b/backend/include/rcc/CodeGen/GlobalISel/GIMatchTableExecutor.h
index fbbf68f..098f9d6 100644
--- a/backend/include/rcc/CodeGen/GlobalISel/GIMatchTableExecutor.h
+++ b/backend/include/rcc/CodeGen/GlobalISel/GIMatchTableExecutor.h
@@ -37,6 +37,8 @@ enum class GIMatchTableOpcode : std::uint8_t {
   CheckOperandBank,
   CheckOperandClass,
   CheckIntegerPredicate,
+  CheckTargetPredicate,
+  CheckOperandImmediateRanges,
   CheckOperandDefConstantRanges,
   CheckOperandDefOpcode,
   CheckOperandDefOperandConstantRanges,
@@ -108,6 +110,10 @@ public:
                                       const TargetDescription &Target) const;
 
 protected:
+  [[nodiscard]] virtual Expected<bool>
+  matchesTargetPredicate(std::string_view Name, const MachineInstr &Instruction,
+                         const MachineFunction &Function, const TargetDescription &Target) const;
+
   [[nodiscard]] virtual Expected<std::optional<GIMatchComplexOperand>>
   renderComplexOperand(std::string_view Name, const MachineInstr &Instruction,
                        const MachineFunction &Function, const TargetDescription &Target,
diff --git a/backend/include/rcc/TableGen/Record.h b/backend/include/rcc/TableGen/Record.h
index 6575b82..1f9dea9 100644
--- a/backend/include/rcc/TableGen/Record.h
+++ b/backend/include/rcc/TableGen/Record.h
@@ -235,15 +235,26 @@ struct SourceSelectionIntegerPredicate final {
   TextRange Range;
 };
 
-struct SourceSelectionOperandDefConstantPredicate final {
+struct SourceSelectionTargetPredicate final {
+  std::string Symbol;
+  TextRange Range;
+};
+
+struct SourceSelectionConstantRange final {
+  std::int64_t Minimum = 0;
+  std::int64_t Maximum = 0;
+  TextRange SourceRange;
+};
+
+struct SourceSelectionOperandImmediatePredicate final {
   std::uint32_t OperandIndex = 0;
-  struct ConstantRange final {
-    std::int64_t Minimum = 0;
-    std::int64_t Maximum = 0;
-    TextRange SourceRange;
-  };
+  std::vector<SourceSelectionConstantRange> Ranges;
+  TextRange Range;
+};
 
-  std::vector<ConstantRange> Ranges;
+struct SourceSelectionOperandDefConstantPredicate final {
+  std::uint32_t OperandIndex = 0;
+  std::vector<SourceSelectionConstantRange> Ranges;
   TextRange Range;
 };
 
@@ -294,9 +305,11 @@ struct SourceSelectionRule final {
   std::string MatchOpcodeSymbol;
   std::optional<SourceSelectionTypePredicate> ResultType;
   std::optional<SourceSelectionIntegerPredicate> IntegerPredicate;
+  std::vector<SourceSelectionTargetPredicate> TargetPredicates;
   std::vector<SourceSelectionOperandTypePredicate> OperandTypes;
   std::vector<SourceSelectionOperandBankPredicate> OperandBanks;
   std::vector<SourceSelectionOperandClassPredicate> OperandClasses;
+  std::vector<SourceSelectionOperandImmediatePredicate> OperandImmediates;
   std::vector<SourceSelectionOperandDefConstantPredicate> OperandDefConstants;
   std::vector<SourceSelectionDefUsePredicate> DefUsePredicates;
   std::vector<SourceSelectionTemporary> Temporaries;
diff --git a/backend/include/rcc/Target/RISCV/RISCVSubtarget.h b/backend/include/rcc/Target/RISCV/RISCVSubtarget.h
index 34ed4bd..c590be6 100644
--- a/backend/include/rcc/Target/RISCV/RISCVSubtarget.h
+++ b/backend/include/rcc/Target/RISCV/RISCVSubtarget.h
@@ -27,6 +27,7 @@ enum class RISCVExtension : std::uint8_t {
   F,
   D,
   C,
+  Zba,
   Zbb,
   Zicsr,
   Zifencei,
-- 
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