From 5845688e91d85d46c0f47daaf4edfdfc772853cf Mon Sep 17 00:00:00 2001
From: Kadir Cetinkaya <kadircet@google.com>
Date: Wed, 13 Nov 2024 09:34:23 +0100
Subject: Reapply "[clang] Introduce diagnostics suppression mappings
 (#112517)"

This reverts commit 5f140ba54794fe6ca379362b133eb27780e363d7.
---
 clang/lib/Frontend/CompilerInstance.cpp | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

(limited to 'clang/lib/Frontend/CompilerInstance.cpp')

diff --git a/clang/lib/Frontend/CompilerInstance.cpp b/clang/lib/Frontend/CompilerInstance.cpp
index 240305b..ecc6782 100644
--- a/clang/lib/Frontend/CompilerInstance.cpp
+++ b/clang/lib/Frontend/CompilerInstance.cpp
@@ -39,6 +39,7 @@
 #include "clang/Serialization/ASTReader.h"
 #include "clang/Serialization/GlobalModuleIndex.h"
 #include "clang/Serialization/InMemoryModuleCache.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/ADT/Statistic.h"
@@ -54,6 +55,7 @@
 #include "llvm/Support/Signals.h"
 #include "llvm/Support/TimeProfiler.h"
 #include "llvm/Support/Timer.h"
+#include "llvm/Support/VirtualFileSystem.h"
 #include "llvm/Support/raw_ostream.h"
 #include "llvm/TargetParser/Host.h"
 #include <optional>
@@ -332,19 +334,22 @@ static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
 
 void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
                                          bool ShouldOwnClient) {
-  Diagnostics = createDiagnostics(&getDiagnosticOpts(), Client,
-                                  ShouldOwnClient, &getCodeGenOpts());
+  Diagnostics = createDiagnostics(
+      &getDiagnosticOpts(), Client, ShouldOwnClient, &getCodeGenOpts(),
+      FileMgr ? FileMgr->getVirtualFileSystemPtr() : nullptr);
 }
 
-IntrusiveRefCntPtr<DiagnosticsEngine>
-CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
-                                    DiagnosticConsumer *Client,
-                                    bool ShouldOwnClient,
-                                    const CodeGenOptions *CodeGenOpts) {
+IntrusiveRefCntPtr<DiagnosticsEngine> CompilerInstance::createDiagnostics(
+    DiagnosticOptions *Opts, DiagnosticConsumer *Client, bool ShouldOwnClient,
+    const CodeGenOptions *CodeGenOpts,
+    llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS) {
   IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
   IntrusiveRefCntPtr<DiagnosticsEngine>
       Diags(new DiagnosticsEngine(DiagID, Opts));
 
+  if (!VFS)
+    VFS = llvm::vfs::getRealFileSystem();
+
   // Create the diagnostic client for reporting errors or for
   // implementing -verify.
   if (Client) {
@@ -367,7 +372,7 @@ CompilerInstance::createDiagnostics(DiagnosticOptions *Opts,
                                Opts->DiagnosticSerializationFile);
 
   // Configure our handling of diagnostics.
-  ProcessWarningOptions(*Diags, *Opts);
+  ProcessWarningOptions(*Diags, *Opts, *VFS);
 
   return Diags;
 }
-- 
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