[llvm] [LLVM][TableGen] Change RegisterBankEmitter to use const RecordKeeper (PR #109195)

[Rahul Joshi via llvm-commits]

https://github.com/jurahul created https://github.com/llvm/llvm-project/pull/109195

Change RegisterBankEmitter to use const RecordKeeper.

>From 7a6c95b8ee7a0876ae8a5a7056759fbd0724af34 Mon Sep 17 00:00:00 2001
From: Rahul Joshi <rjoshi at nvidia.com>
Date: Wed, 18 Sep 2024 13:41:49 -0700
Subject: [PATCH] [LLVM][TableGen] Change RegisterBankEmitter to use const
 RecordKeeper

---
 llvm/utils/TableGen/RegisterBankEmitter.cpp | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/llvm/utils/TableGen/RegisterBankEmitter.cpp b/llvm/utils/TableGen/RegisterBankEmitter.cpp
index 6872f16df4724e..460f286543b176 100644
--- a/llvm/utils/TableGen/RegisterBankEmitter.cpp
+++ b/llvm/utils/TableGen/RegisterBankEmitter.cpp
@@ -107,18 +107,18 @@ class RegisterBank {
 
 class RegisterBankEmitter {
 private:
-  CodeGenTarget Target;
-  RecordKeeper &Records;
+  const CodeGenTarget Target;
+  const RecordKeeper &Records;
 
   void emitHeader(raw_ostream &OS, const StringRef TargetName,
-                  const std::vector<RegisterBank> &Banks);
+                  ArrayRef<RegisterBank> Banks);
   void emitBaseClassDefinition(raw_ostream &OS, const StringRef TargetName,
-                               const std::vector<RegisterBank> &Banks);
+                               ArrayRef<RegisterBank> Banks);
   void emitBaseClassImplementation(raw_ostream &OS, const StringRef TargetName,
-                                   std::vector<RegisterBank> &Banks);
+                                   ArrayRef<RegisterBank> Banks);
 
 public:
-  RegisterBankEmitter(RecordKeeper &R) : Target(R), Records(R) {}
+  RegisterBankEmitter(const RecordKeeper &R) : Target(R), Records(R) {}
 
   void run(raw_ostream &OS);
 };
@@ -129,7 +129,7 @@ class RegisterBankEmitter {
 /// variables.
 void RegisterBankEmitter::emitHeader(raw_ostream &OS,
                                      const StringRef TargetName,
-                                     const std::vector<RegisterBank> &Banks) {
+                                     ArrayRef<RegisterBank> Banks) {
   // <Target>RegisterBankInfo.h
   OS << "namespace llvm {\n"
      << "namespace " << TargetName << " {\n"
@@ -147,8 +147,7 @@ void RegisterBankEmitter::emitHeader(raw_ostream &OS,
 
 /// Emit declarations of the <Target>GenRegisterBankInfo class.
 void RegisterBankEmitter::emitBaseClassDefinition(
-    raw_ostream &OS, const StringRef TargetName,
-    const std::vector<RegisterBank> &Banks) {
+    raw_ostream &OS, const StringRef TargetName, ArrayRef<RegisterBank> Banks) {
   OS << "private:\n"
      << "  static const RegisterBank *RegBanks[];\n"
      << "  static const unsigned Sizes[];\n\n"
@@ -218,7 +217,7 @@ static void visitRegisterBankClasses(
 }
 
 void RegisterBankEmitter::emitBaseClassImplementation(
-    raw_ostream &OS, StringRef TargetName, std::vector<RegisterBank> &Banks) {
+    raw_ostream &OS, StringRef TargetName, ArrayRef<RegisterBank> Banks) {
   const CodeGenRegBank &RegisterClassHierarchy = Target.getRegBank();
   const CodeGenHwModes &CGH = Target.getHwModes();