Pass StringRefs by value.

llvm-svn: 108375

Removing trailing directory separator, to make stat work

llvm-svn: 91684

FileManager: Do not cache failed stats, it is easy to construct common
inconsistent situations if we do, and they are not important for PCH performance
(which currently only needs the stats to constr

FileManager: Do not cache failed stats, it is easy to construct common
inconsistent situations if we do, and they are not important for PCH performance
(which currently only needs the stats to construct the initial FileManager
entries).
- No test case, sorry, the machinations are too involved.

This occurs when, for example, the build makes a PCH file and has a header map
or a -I for a directory that does not yet exist. It is possible we will cache
the negative stat on that directory, and then in the build we will never find
header files inside that dir.

For PCH we don't need these stats anyway for performance, so this also makes PCH
files smaller w/ no loss. I hope to eventually eliminate the stat cache
entirely.

llvm-svn: 91082

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Extend -remap-file=from;to to permit mapping from a non-existent
file. This is accomplished by introducing the notion of a "virtual"
file into the file manager, which provides a FileEntry* for a name

Extend -remap-file=from;to to permit mapping from a non-existent
file. This is accomplished by introducing the notion of a "virtual"
file into the file manager, which provides a FileEntry* for a named
file whose size and modification time are known but which may not
exist on disk.

Added a cute little test that remaps both a .c file and a .h file it
includes to alternative files.

llvm-svn: 90329

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Add support for a chain of stat caches in the FileManager, rather than
only supporting a single stat cache. The immediate benefit of this
change is that we can now generate a PCH/AST file when includ

Add support for a chain of stat caches in the FileManager, rather than
only supporting a single stat cache. The immediate benefit of this
change is that we can now generate a PCH/AST file when including
another PCH file; in the future, the chain of stat caches will likely
be useful with multiple levels of PCH files.

llvm-svn: 84263

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don't stick an uninitialized 'stat' buf into the stat cache, fill it
with zeros. This avoids a GCC warning (PR5000)

llvm-svn: 82194

Remove tabs, and whitespace cleanups.

llvm-svn: 81346

Replace some instances of std::string with StringRefs.

llvm-svn: 81079

API changes to match llvm ToT.

llvm-svn: 79868

Replace cerr with errs().

llvm-svn: 79854

improve path handling, patch by Baptiste Lepilleur!

llvm-svn: 78824

Implement caching of stat() calls for precompiled headers, which is
essentially the same thing we do with pretokenized headers. stat()
caching improves performance of the Cocoa-prefixed "Hello, World

Implement caching of stat() calls for precompiled headers, which is
essentially the same thing we do with pretokenized headers. stat()
caching improves performance of the Cocoa-prefixed "Hello, World" by
45%.

llvm-svn: 70223

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Remove the serialization code that predates precompiled
headers. Future approaches to (de-)serializing ASTs will be based on
the PCH infrastructure.

llvm-svn: 69828

FileManager:
- set the 'StatSysCallCache' object using a setter method instead of
FileManager's constructor. This allows the cache to be installed after the
FileManager object is created.
- Add '

FileManager:
- set the 'StatSysCallCache' object using a setter method instead of
FileManager's constructor. This allows the cache to be installed after the
FileManager object is created.
- Add 'file mode' to FileEntry (useful for stat caching)

llvm-svn: 64351

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search and replaceo?

llvm-svn: 64348

Add lightweight shim "clang::StatSysCallCache" that caches 'stat' system calls
for use by FileManager. FileManager now takes a StatSysCallCache* in its
constructor (which defaults to NULL). This will

Add lightweight shim "clang::StatSysCallCache" that caches 'stat' system calls
for use by FileManager. FileManager now takes a StatSysCallCache* in its
constructor (which defaults to NULL). This will be used for evaluating whether
or not caching 'stat' system calls in PTH is a performance win. This shim adds
no observable performance impact in the case where the 'StatSysCallCache*' is
null.

llvm-svn: 64345

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On Windows use a BumpPtrAllocator for the UniqueFileContainer's StringMap.

llvm-svn: 63162

FileManager: Use a BumpPtrAllocator for the StringMaps DirEntries and FileEntries.

Performance impact (clang -fsyntax-only INPUTS/Cocoa_h.m):
non-PTH: 0.4% improvement
PTH: 0.8% improvement

llv

FileManager: Use a BumpPtrAllocator for the StringMaps DirEntries and FileEntries.

Performance impact (clang -fsyntax-only INPUTS/Cocoa_h.m):
non-PTH: 0.4% improvement
PTH: 0.8% improvement

llvm-svn: 63159

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Add a some comments to designate Windows-specific/Unix-specific code. No functionality change.

llvm-svn: 63157

Make a major restructuring of the clang tree: introduce a top-level
lib dir and move all the libraries into it. This follows the main
llvm tree, and allows the libraries to be built in parallel. Th

Make a major restructuring of the clang tree: introduce a top-level
lib dir and move all the libraries into it. This follows the main
llvm tree, and allows the libraries to be built in parallel. The
top level now enforces that all the libs are built before Driver,
but we don't care what order the libs are built in. This speeds
up parallel builds, particularly incremental ones.

llvm-svn: 48402

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