Add --disable-free flag to clang.
- Disables the freeing of the ASTContext and the TranslationUnit
after parsing & sema.
- Primarily for timing the impact on -fsyntax-only timings.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57643 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index ae7ec87..060fbf3 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -54,13 +54,17 @@
// Global options.
//===----------------------------------------------------------------------===//
-bool HadErrors = false;
+static bool HadErrors = false;
static llvm::cl::opt<bool>
Verbose("v", llvm::cl::desc("Enable verbose output"));
static llvm::cl::opt<bool>
Stats("print-stats",
llvm::cl::desc("Print performance metrics and statistics"));
+static llvm::cl::opt<bool>
+DisableFree("disable-free",
+ llvm::cl::desc("Disable freeing of memory on exit"),
+ llvm::cl::init(false));
enum ProgActions {
RewriteObjC, // ObjC->C Rewriter.
@@ -1187,7 +1191,7 @@
if (VerifyDiagnostics)
exit(CheckASTConsumer(PP, Consumer.get()));
- ParseAST(PP, Consumer.get(), Stats);
+ ParseAST(PP, Consumer.get(), Stats, !DisableFree);
} else {
if (VerifyDiagnostics)
exit(CheckDiagnostics(PP));
diff --git a/include/clang/Sema/ParseAST.h b/include/clang/Sema/ParseAST.h
index 907372d..60249ed 100644
--- a/include/clang/Sema/ParseAST.h
+++ b/include/clang/Sema/ParseAST.h
@@ -21,7 +21,11 @@
/// ParseAST - Parse the entire file specified, notifying the ASTConsumer as
/// the file is parsed. This takes ownership of the ASTConsumer and
/// ultimately deletes it.
- void ParseAST(Preprocessor &pp, ASTConsumer *C, bool PrintStats = false);
+ ///
+ /// \param FreeMemory If false, the memory used for AST elements is
+ /// not released.
+ void ParseAST(Preprocessor &pp, ASTConsumer *C,
+ bool PrintStats = false, bool FreeMemory = true);
} // end namespace clang
diff --git a/lib/Sema/ParseAST.cpp b/lib/Sema/ParseAST.cpp
index fc35096..567cfc2 100644
--- a/lib/Sema/ParseAST.cpp
+++ b/lib/Sema/ParseAST.cpp
@@ -26,26 +26,30 @@
/// ParseAST - Parse the entire file specified, notifying the ASTConsumer as
/// the file is parsed. This takes ownership of the ASTConsumer and
/// ultimately deletes it.
-void clang::ParseAST(Preprocessor &PP, ASTConsumer *Consumer, bool PrintStats) {
+///
+/// \param FreeMemory If false, the memory used for AST elements is
+/// not released.
+void clang::ParseAST(Preprocessor &PP, ASTConsumer *Consumer,
+ bool PrintStats, bool FreeMemory) {
// Collect global stats on Decls/Stmts (until we have a module streamer).
if (PrintStats) {
Decl::CollectingStats(true);
Stmt::CollectingStats(true);
}
- ASTContext Context(PP.getLangOptions(), PP.getSourceManager(),
- PP.getTargetInfo(),
- PP.getIdentifierTable(), PP.getSelectorTable());
-
- TranslationUnit TU(Context);
- Sema S(PP, Context, *Consumer);
+ ASTContext *Context =
+ new ASTContext(PP.getLangOptions(), PP.getSourceManager(),
+ PP.getTargetInfo(),
+ PP.getIdentifierTable(), PP.getSelectorTable());
+ TranslationUnit *TU = new TranslationUnit(*Context);
+ Sema S(PP, *Context, *Consumer);
Parser P(PP, S);
PP.EnterMainSourceFile();
// Initialize the parser.
P.Initialize();
- Consumer->InitializeTU(TU);
+ Consumer->InitializeTU(*TU);
Parser::DeclTy *ADecl;
@@ -55,17 +59,17 @@
// skipping something.
if (ADecl) {
Decl* D = static_cast<Decl*>(ADecl);
- TU.AddTopLevelDecl(D); // TranslationUnit now owns the Decl.
+ TU->AddTopLevelDecl(D); // TranslationUnit now owns the Decl.
Consumer->HandleTopLevelDecl(D);
}
};
- Consumer->HandleTranslationUnit(TU);
+ Consumer->HandleTranslationUnit(*TU);
if (PrintStats) {
fprintf(stderr, "\nSTATISTICS:\n");
P.getActions().PrintStats();
- Context.PrintStats();
+ Context->PrintStats();
Decl::PrintStats();
Stmt::PrintStats();
Consumer->PrintStats();
@@ -73,4 +77,9 @@
Decl::CollectingStats(false);
Stmt::CollectingStats(false);
}
+
+ if (FreeMemory) {
+ delete TU;
+ delete Context;
+ }
}