[llvm] [TableGen] Eliminate use of `convertInitializerTo` in SearchableTable (PR #109206)

[Rahul Joshi via llvm-commits]

https://github.com/jurahul created https://github.com/llvm/llvm-project/pull/109206

Eliminate use of `convertInitializerTo` as that needs a non-const RecordKeeper (which we want to make const).

>From f94cd79dcc425c3a18e27e04e295dfd7bc35e53b Mon Sep 17 00:00:00 2001
From: Rahul Joshi <rjoshi at nvidia.com>
Date: Wed, 18 Sep 2024 14:53:46 -0700
Subject: [PATCH] [TableGen] Eliminate use of `convertInitializerTo` in
 SearchableTable

Eliminate use of `convertInitializerTo` as that needs a non-const
RecordKeeper (which we want to make const).
---
 llvm/utils/TableGen/SearchableTableEmitter.cpp | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/llvm/utils/TableGen/SearchableTableEmitter.cpp b/llvm/utils/TableGen/SearchableTableEmitter.cpp
index 37534fe4ca6afe..c7ba5c96e42017 100644
--- a/llvm/utils/TableGen/SearchableTableEmitter.cpp
+++ b/llvm/utils/TableGen/SearchableTableEmitter.cpp
@@ -31,17 +31,20 @@ using namespace llvm;
 
 #define DEBUG_TYPE "searchable-table-emitter"
 
-namespace {
-
-int64_t getAsInt(Init *B) {
-  return cast<IntInit>(
-             B->convertInitializerTo(IntRecTy::get(B->getRecordKeeper())))
-      ->getValue();
+static int64_t getAsInt(const Init *B) {
+  errs() << "Kind = " << (int)B->getKind() << " : " << *B << "\n";
+  if (const BitsInit *BI = dyn_cast<BitsInit>(B))
+    return *BI->convertInitializerToInt();
+  else if (const IntInit *II = dyn_cast<IntInit>(BI))
+    return II->getValue();
+  llvm_unreachable("Unexpected initializer");
 }
-int64_t getInt(Record *R, StringRef Field) {
+
+static int64_t getInt(const Record *R, StringRef Field) {
   return getAsInt(R->getValueInit(Field));
 }
 
+namespace {
 struct GenericEnum {
   using Entry = std::pair<StringRef, int64_t>;