From 8a4bb6e3b0bffa0ed79b51347b12ee4293b622a7 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Sat, 22 Aug 2026 18:49:08 +0800
Subject: [CodeGen] Generate RISC-V macro fusion rules

---
 backend/utils/TableGen/rcc-tblgen.cpp | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

(limited to 'backend/utils/TableGen/rcc-tblgen.cpp')

diff --git a/backend/utils/TableGen/rcc-tblgen.cpp b/backend/utils/TableGen/rcc-tblgen.cpp
index 5a5a419..47f0de4 100644
--- a/backend/utils/TableGen/rcc-tblgen.cpp
+++ b/backend/utils/TableGen/rcc-tblgen.cpp
@@ -23,6 +23,7 @@ struct CommandLine final {
   std::string TablesPath;
   std::string GlobalISelPath;
   std::string GlobalISelCombinerPath;
+  std::string MacroFusionPath;
 };
 
 [[nodiscard]] bool parseCommandLine(int ArgumentCount, char *Arguments[], CommandLine &Result) {
@@ -38,7 +39,7 @@ struct CommandLine final {
     }
     if (Argument == "--register-header" || Argument == "--instruction-header" ||
         Argument == "--tables" || Argument == "--global-isel" ||
-        Argument == "--global-isel-combiner") {
+        Argument == "--global-isel-combiner" || Argument == "--macro-fusion") {
       if (Index + 1 >= ArgumentCount) {
         std::cerr << "rcc-tblgen: missing value for " << Argument << '\n';
         return false;
@@ -52,6 +53,8 @@ struct CommandLine final {
         Destination = &Result.GlobalISelPath;
       else if (Argument == "--global-isel-combiner")
         Destination = &Result.GlobalISelCombinerPath;
+      else if (Argument == "--macro-fusion")
+        Destination = &Result.MacroFusionPath;
       else
         Destination = &Result.TablesPath;
       *Destination = Arguments[++Index];
@@ -62,12 +65,13 @@ struct CommandLine final {
   }
   if (!Result.InputPaths.empty() && !Result.RegisterHeaderPath.empty() &&
       !Result.InstructionHeaderPath.empty() && !Result.TablesPath.empty() &&
-      !Result.GlobalISelPath.empty() && !Result.GlobalISelCombinerPath.empty()) {
+      !Result.GlobalISelPath.empty() && !Result.GlobalISelCombinerPath.empty() &&
+      !Result.MacroFusionPath.empty()) {
     return true;
   }
   std::cerr << "usage: rcc-tblgen --input <file> [--input <fragment>]... --register-header <file> "
                "--instruction-header <file> --tables <file> --global-isel <file> "
-               "--global-isel-combiner <file>\n";
+               "--global-isel-combiner <file> --macro-fusion <file>\n";
   return false;
 }
 
@@ -233,7 +237,8 @@ int main(int ArgumentCount, char *Arguments[]) {
                  writeFile(Command.InstructionHeaderPath, Output.InstructionHeader) &&
                  writeFile(Command.TablesPath, Output.TargetTables) &&
                  writeFile(Command.GlobalISelPath, Output.GlobalISel) &&
-                 writeFile(Command.GlobalISelCombinerPath, Output.GlobalISelCombiner)
+                 writeFile(Command.GlobalISelCombinerPath, Output.GlobalISelCombiner) &&
+                 writeFile(Command.MacroFusionPath, Output.MacroFusion)
              ? 0
              : 1;
 }
-- 
cgit v1.2.3