Introduce '-chain-include' option to specify headers that will be converted to chained PCHs in memory
without having to use multiple runs and intermediate files.
Intended for testing & debugging of chained PCH.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127339 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/FrontendAction.cpp b/lib/Frontend/FrontendAction.cpp
index e3d8b85..5c34e94 100644
--- a/lib/Frontend/FrontendAction.cpp
+++ b/lib/Frontend/FrontendAction.cpp
@@ -20,6 +20,7 @@
#include "clang/Frontend/MultiplexConsumer.h"
#include "clang/Parse/ParseAST.h"
#include "clang/Serialization/ASTDeserializationListener.h"
+#include "clang/Serialization/ChainedIncludesSource.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/ErrorHandling.h"
@@ -209,8 +210,16 @@
CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
- /// Use PCH?
- if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
+ if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
+ // Convert headers to PCH and chain them.
+ llvm::OwningPtr<ExternalASTSource> source;
+ source.reset(ChainedIncludesSource::create(CI));
+ if (!source)
+ goto failure;
+ CI.getASTContext().setExternalSource(source);
+
+ } else if (!CI.getPreprocessorOpts().ImplicitPCHInclude.empty()) {
+ // Use PCH.
assert(hasPCHSupport() && "This action does not have PCH support!");
ASTDeserializationListener *DeserialListener
= CI.getInvocation().getFrontendOpts().ChainedPCH ?