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[Dependency Scanning] Disable Swift Parser ASTGen during dependency scan

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On both input moduel source-files and interface files.
This currently yields dramatic scanning performance improvements at no cost - we do not require an AST during scan.
This commit is contained in:
Artem Chikin
2023-03-31 15:49:54 -07:00
parent 76c5e4f1ae
commit cc34ba00e2
4 changed files with 51 additions and 30 deletions
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8
lib/Serialization/ModuleDependencyScanner.cpp
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@@ -16,6 +16,7 @@
#include "swift/AST/ModuleDependencies.h"
#include "swift/AST/SourceFile.h"
#include "swift/AST/TypeCheckRequests.h"
#include "swift/AST/SourceFile.h"
#include "swift/Basic/FileTypes.h"
#include "swift/Frontend/ModuleInterfaceLoader.h"
#include "swift/Serialization/SerializedModuleLoader.h"
@@ -157,8 +158,13 @@ ErrorOr<ModuleDependencyInfo> ModuleDependencyScanner::scanInterfaceFile(
// Create a source file.
unsigned bufferID = Ctx.SourceMgr.addNewSourceBuffer(std::move(interfaceBuf.get()));
auto moduleDecl = ModuleDecl::create(realModuleName, Ctx);
// Dependency scanning does not require an AST, so disable Swift Parser
// ASTGen parsing completely.
SourceFile::ParsingOptions parsingOpts;
parsingOpts |= SourceFile::ParsingFlags::DisableSwiftParserASTGen;
auto sourceFile = new (Ctx) SourceFile(
*moduleDecl, SourceFileKind::Interface, bufferID);
*moduleDecl, SourceFileKind::Interface, bufferID, parsingOpts);
moduleDecl->addAuxiliaryFile(*sourceFile);
// Walk the source file to find the import declarations.