maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity

clang-cc: Factor ReadPCHFile out of ProcessInputFile. 

llvm-svn: 86936
This commit is contained in:
Daniel Dunbar 2009-11-12 02:53:20 +00:00
parent 92641dca86
commit 4806f2ea48
1 changed files with 40 additions and 32 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
clang/tools/clang-cc/clang-cc.cpp
View File

@ -631,6 +631,41 @@ static ASTConsumer *CreateConsumerAction(const CompilerInvocation &CompOpts,
}
}
/// ReadPCHFile - Load a PCH file from disk, and initialize the preprocessor for
/// reading from the PCH file.
///
/// \return The AST source, or null on failure.
static ExternalASTSource *ReadPCHFile(llvm::StringRef Path,
const CompilerInvocation &CompOpts,
Preprocessor &PP,
ASTContext &Context) {
// If the user specified -isysroot, it will be used for relocatable PCH files.
const char *isysrootPCH = CompOpts.getHeaderSearchOpts().Sysroot.c_str();
if (isysrootPCH[0] == '\0')
isysrootPCH = 0;
llvm::OwningPtr<PCHReader> Reader;
Reader.reset(new PCHReader(PP, &Context, isysrootPCH));
switch (Reader->ReadPCH(Path)) {
case PCHReader::Success:
// Set the predefines buffer as suggested by the PCH reader. Typically, the
// predefines buffer will be empty.
PP.setPredefines(Reader->getSuggestedPredefines());
return Reader.take();
case PCHReader::Failure:
// Unrecoverable failure: don't even try to process the input file.
break;
case PCHReader::IgnorePCH:
// No suitable PCH file could be found. Return an error.
break;
}
return 0;
}
/// ProcessInputFile - Process a single input file with the specified state.
///
static void ProcessInputFile(const CompilerInvocation &CompOpts,
@ -731,40 +766,13 @@ static void ProcessInputFile(const CompilerInvocation &CompOpts,
/* FreeMemory = */ !DisableFree,
/* size_reserve = */0));
if (Consumer && !ImplicitPCHInclude.empty()) {
// If the user specified -isysroot, it will be used for relocatable PCH
// files.
const char *isysrootPCH = CompOpts.getHeaderSearchOpts().Sysroot.c_str();
if (isysrootPCH[0] == '\0')
isysrootPCH = 0;
llvm::OwningPtr<PCHReader> Reader;
Reader.reset(new PCHReader(PP, ContextOwner.get(), isysrootPCH));
// The user has asked us to include a precompiled header. Load
// the precompiled header into the AST context.
switch (Reader->ReadPCH(ImplicitPCHInclude)) {
case PCHReader::Success: {
// Set the predefines buffer as suggested by the PCH
// reader. Typically, the predefines buffer will be empty.
PP.setPredefines(Reader->getSuggestedPredefines());
// Attach the PCH reader to the AST context as an external AST
// source, so that declarations will be deserialized from the
// PCH file as needed.
Source.reset(Reader.take());
ContextOwner->setExternalSource(Source);
break;
}
case PCHReader::Failure:
// Unrecoverable failure: don't even try to process the input
// file.
Source.reset(ReadPCHFile(ImplicitPCHInclude, CompOpts, PP, *ContextOwner));
if (!Source)
return;
case PCHReader::IgnorePCH:
// No suitable PCH file could be found. Return an error.
return;
}
// Attach the PCH reader to the AST context as an external AST source, so
// that declarations will be deserialized from the PCH file as needed.
ContextOwner->setExternalSource(Source);
}
// Initialize the main file entry. This needs to be delayed until after PCH