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[clang][deps] Share FileManager between modules #115065

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Merged
merged 1 commit into from
Nov 6, 2024
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[clang][deps] Share FileManager between modules #115065

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4 changes: 3 additions & 1 deletion clang/lib/Tooling/DependencyScanning/DependencyScanningWorker.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -335,7 +335,9 @@ class DependencyScanningAction : public tooling::ToolAction {

ScanInstance.getFrontendOpts().GenerateGlobalModuleIndex = false;
ScanInstance.getFrontendOpts().UseGlobalModuleIndex = false;
ScanInstance.getFrontendOpts().ModulesShareFileManager = false;
// This will prevent us compiling individual modules asynchronously since
// FileManager is not thread-safe, but it does improve performance for now.
ScanInstance.getFrontendOpts().ModulesShareFileManager = true;
ScanInstance.getHeaderSearchOpts().ModuleFormat = "raw";
ScanInstance.getHeaderSearchOpts().ModulesIncludeVFSUsage =
any(OptimizeArgs & ScanningOptimizations::VFS);
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