Cut down the number of open/close system calls for output files.

For PCH files, have only one open/close for temporary + rename to be safe from race conditions.
For all other output files open/close

Cut down the number of open/close system calls for output files.

For PCH files, have only one open/close for temporary + rename to be safe from race conditions.
For all other output files open/close the output file directly.

Depends on llvm r136310. rdar://9082880 & http://llvm.org/PR9374.

llvm-svn: 136315

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remove unneeded llvm:: namespace qualifiers on some core types now that LLVM.h imports
them into the clang namespace.

llvm-svn: 135852

Switch all of the "isysroot" const char*'s throughout the AST reader
and writer to StringRef or std::string, as appropriate.

llvm-svn: 135769

Rename ASTReader::PerFileData to serialization::Module, pulling it out
of ASTReader so it can become its own full-fledged class
(eventually). No functionality change.

llvm-svn: 135767

Cut down one open/close pair of system calls by using Path's makeUnique instead of createTemporaryFileOnDisk.

llvm-svn: 135690

Revamp the SourceManager to separate the representation of parsed
source locations from source locations loaded from an AST/PCH file.

Previously, loading an AST/PCH file involved carefully pre-alloc

Revamp the SourceManager to separate the representation of parsed
source locations from source locations loaded from an AST/PCH file.

Previously, loading an AST/PCH file involved carefully pre-allocating
space at the beginning of the source manager for the source locations
and FileIDs that correspond to the prefix, and then appending the
source locations/FileIDs used for parsing the remaining translation
unit. This design forced us into loading PCH files early, as a prefix,
whic has become a rather significant limitation.

This patch splits the SourceManager space into two parts: for source
location "addresses", the lower values (growing upward) are used to
describe parsed code, while upper values (growing downward) are used
for source locations loaded from AST/PCH files. Similarly, positive
FileIDs are used to describe parsed code while negative FileIDs are
used to file/macro locations loaded from AST/PCH files. As a result,
we can load PCH/AST files even during parsing, making various
improvemnts in the future possible, e.g., teaching #include <foo.h> to
look for and load <foo.h.gch> if it happens to be already available.

This patch was originally written by Sebastian Redl, then brought
forward to the modern age by Jonathan Turner, and finally
polished/finished by me to be committed.

llvm-svn: 135484

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NestedMacroInstantiations -> NestedMacroExpansions

This is switches all the interfaces points (and most of the commenst
/ local variables I saw on my way through) regarding the
NestedMacroInstantiat

NestedMacroInstantiations -> NestedMacroExpansions

This is switches all the interfaces points (and most of the commenst
/ local variables I saw on my way through) regarding the
NestedMacroInstantiations bit.

The libclang enums corresponding to this state were renamed, but
a legacy enum was added with the old name, and the same value to keep
existing clients working. I've added a documentation blurb for it, but
let me know if there is a canonical way to document legacy elemenst of
the libclang interface.

No functionality changed here, even in tests.

llvm-svn: 135141

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avoid using config.h in public headers

This is the only usage in clang's headers, and it's for a define
that only exists on CMake builds for the sake of the MSVC compiler,
so just use an ifdef inste

avoid using config.h in public headers

This is the only usage in clang's headers, and it's for a define
that only exists on CMake builds for the sake of the MSVC compiler,
so just use an ifdef instead.

Also add an include for config.h in a file that actually needs it,
and was picking it up by accident indirectly.

llvm-svn: 133710

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Raise the ARCMT functionality in Clang into proper FrontendActions.
These are somewhat special in that they wrap any other FrontendAction,
running various ARC transformations or checks prior to the s

Raise the ARCMT functionality in Clang into proper FrontendActions.
These are somewhat special in that they wrap any other FrontendAction,
running various ARC transformations or checks prior to the standard
action's run. To implement them easily, this extends FrontendAction to
have a WrapperFrontendAction utility class which forwards all calls by
default to an inner action setup at construction time. This is then
subclassed to override the specific behavior needed by the different
ARCMT tools.

Finally, FrontendTool is taught how to create these wrapper actions from
the existing flags and options structures.

The result is that clangFrontend no longer depends on clangARCMigrate.
This is very important, as clangARCMigrate *heavily* depends on
clangFrontend. Fundamentally ARCMigrate is at the same layer as
a library like Rewrite, sitting firmly on top of the Frontend, but tied
together with the FrontendTool when building the clang binary itself.

llvm-svn: 133161

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The ARC Migration Tool. All the credit goes to Argyrios and Fariborz
for this.

llvm-svn: 133104

Introduce a new libclang parsing flag,
CXTranslationUnit_NestedMacroInstantiations, which indicates whether
we want to see "nested" macro instantiations (e.g., those that occur
inside other macro ins

Introduce a new libclang parsing flag,
CXTranslationUnit_NestedMacroInstantiations, which indicates whether
we want to see "nested" macro instantiations (e.g., those that occur
inside other macro instantiations) within the detailed preprocessing
record. Many clients (e.g., those that only care about visible tokens)
don't care about this information, and in code that uses preprocessor
metaprogramming, this information can have a very high cost.

Addresses <rdar://problem/9389320>.

llvm-svn: 130990

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Frontend/CC_LOG_DIAGNOSTICS: Fix thinko and open diag log in append mode.

llvm-svn: 129103

Fronted/CC_LOG_DIAGNOSTICS: Wire up dwarf-debug-flags support.

llvm-svn: 129095

Frontend: Sketch a LogDiagnosticPrinter object, and wire CC_LOG_DIAGNOSTICS to
it.

llvm-svn: 129089

Frontend: Change CC_PRINT_HEADERS to not print header depth markers, these don't
really make any sense in this environment.

llvm-svn: 128014

Improve crash recovery cleanup to recovery CompilerInstances during crash recovery. This was a huge resource "root" during crashes.

This change requires making a bunch of fundamental Clang structur

Improve crash recovery cleanup to recovery CompilerInstances during crash recovery. This was a huge resource "root" during crashes.

This change requires making a bunch of fundamental Clang structures (optionally) reference counted to allow correct
ownership semantics of these objects (e.g., ASTContext) to play out between an active ASTUnit and CompilerInstance
object.

llvm-svn: 128011

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Get rid of the static FileManager::FixupRelativePath.

llvm-svn: 127573

Convert FileManager::FixupRelativePath over to using PathV2.

llvm-svn: 127133

Re-instate r125819 and r125820 with no functionality change

llvm-svn: 126060

Revert 125820 and 125819 to fix PR9266.

llvm-svn: 126050

Move CompilerInstance::LLVMContext and LLVMContext ownership to CodeGenAction

This removes the final dependency edge from any lib outside of CodeGen
to core. As a result we can, and do, trim the de

Move CompilerInstance::LLVMContext and LLVMContext ownership to CodeGenAction

This removes the final dependency edge from any lib outside of CodeGen
to core. As a result we can, and do, trim the dependency on core
from libclang, PrintFunctionNames, the unit tests and c-index-test.
While at it, review and trim other unneeded dependencies.

llvm-svn: 125820

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Improve our uniquing of file entries when files are re-saved or are
overridden via remapping. Thus, when we create a "virtual" file in the
file manager, we still stat() the real file that lives behin

Improve our uniquing of file entries when files are re-saved or are
overridden via remapping. Thus, when we create a "virtual" file in the
file manager, we still stat() the real file that lives behind it so
that we can provide proper uniquing based on inodes. This helps keep
the file manager much more consistent.

To take advantage of this when reparsing files in libclang, we disable
the use of the stat() cache when reparsing or performing code
completion, since the stat() cache is very likely to be out of date in
this use case.

llvm-svn: 124971

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Frontend: Add -header-include-file option, for allowing saving header include
information to a file.

llvm-svn: 124750

Frontend: Factor out header include dumping (-H) into its own preprocessor
callbacks class.
- Aside from being generally cleaner, this also allows -H to work correctly in
modes other than standar

Frontend: Factor out header include dumping (-H) into its own preprocessor
callbacks class.
- Aside from being generally cleaner, this also allows -H to work correctly in
modes other than standard preprocessing (e.g., -c, -MM, etc.)

llvm-svn: 124723

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Frontend: Add an explicit RemoveFileOnSignal flag argument, to control the
automatic behavior (which is undesirable in a multithreaded context).

llvm-svn: 124612