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completion, since the stat() cache is very likely to be out of date in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

or source locations that refer into a macro instantiation, delete all
of the Fix-Its on that diagnostic.

llvm-svn: 124833

whose inode has changed since the file was first created and that is
being seen through a different path name (e.g., due to symlinks or
relative path elements), such that its FileEntry pointer doesn't match
a known FileEntry pointer. Since this requires a system call (to
stat()), we only perform this deeper checking if we can't find the
file by comparing FileEntry pointers.

Also, add a micro-optimization where we don't bother to compute line
numbers when given the location (1, 1). This improves the
efficiency of clang_getLocationForOffset().
 

llvm-svn: 124800

links.

llvm-svn: 124776

redundant searches in the string. No functionality change.

llvm-svn: 124760

on that name. Canonicalization eliminates silliness such as "." and
"foo/.." that breaks the uniquing of files in the presence of virtual
files or files whose inode numbers have changed during
parsing/re-parsing. c-index-test isn't able to create this crazy
situation, so I've resorted to testing outside of the Clang
tree. Fixes <rdar://problem/8928220>.

Note that this hackery will go away once we have a real virtual file
system on which we can layer FileManager; the virtual-files hack is
showing cracks.

llvm-svn: 124754

llvm-svn: 124660

the disappearance/alteration of files.

llvm-svn: 124616

client. Fixes a libclang leak.

llvm-svn: 124614

llvm-svn: 124441

TextDiagnosticPrinter.cpp: Show diagnostics as far as possible even with invalid PresomedLoc, instead of just silencing it.

FileManager.cpp: Allow virtual files in nonexistent directories.
FileManager.cpp: Close FileDescriptor for virtual files that correspond to actual files.
FileManager.cpp: Enable virtual files to be created even for files that were flagged as NON_EXISTENT_FILE, e.g. by a prior (unsuccessful) addFile().

ASTReader.cpp: Read a PCH even if the original source files cannot be found.

Add a test for reading a PCH of a file that has been removed and diagnostics referencing that file.

llvm-svn: 124374

llvm-svn: 123691

It should be defined as-is. Some headers would detect existence of __declspec and use one.

llvm-svn: 123690

llvm-svn: 123689

Addresses rdar://8435969&8852495

llvm-svn: 123462

llvm-svn: 123320

Fix an unexpected hickup caused by exceeding size of
generated table (and a misleading comment). Improve
on help message for -fapple-kext.

llvm-svn: 123003

Patch by Sylvère Teissier.

llvm-svn: 122965

Fix the width and align of bool type on Darwin to be 32bits
while keeping it 8 everywhere else.

Change the definition of va_list to default to SV4 ABI one
and let darwin subtarget override this.

Both changes submitted by Nathan Whitehorn and reviewed
by Rafael Espindola.

llvm-svn: 122956

llvm-svn: 122629

16-bits in size.  Implement this by splitting WChar into two enums, like we have
for char.  This fixes a miscompmilation of XULRunner, PR8856.

llvm-svn: 122558

Handle locations coming from macro instantiations properly in SourceManager::isBeforeInTranslationUnit().
Fixes rdar://8790245 and http://llvm.org/PR8821.

llvm-svn: 122536

inconsistent with the type that the builtin *should* have, forget
about the builtin altogether: we don't want subsequence analyses,
CodeGen, etc., to think that we have a proper builtin function.

C is protected from errors here because it allows one to use a
library builtin without having a declaration, and detects inconsistent
(re-)declarations of builtins during declaration merging. C++ was
unprotected, and therefore would crash.

Fixes PR8839.

llvm-svn: 122351

llvm-svn: 122340

llvm-svn: 122194

llvm-svn: 122087

llvm-svn: 121956

Diagnostic pragmas are broken because we don't keep track of the diagnostic state changes and we only check the current/latest state.
Problems manifest if a diagnostic is emitted for a source line that has different diagnostic state than the current state; this can affect
a lot of places, like C++ inline methods, template instantiations, the lexer, etc.

Fix the issue by having the Diagnostic object keep track of the source location of the pragmas so that it is able to know what is the diagnostic state at any given source location.

Fixes rdar://8365684.

llvm-svn: 121873

llvm-svn: 121640

llvm-svn: 121378

llvm-svn: 120688

a specific language. We are adding such language info. by
extensing Builtins.def and via a language flag added
to LIBBUILTIN/BUILTIN and check for that when deciding
a name is builtin or not. Implements //rdar://8689273.

llvm-svn: 120429

llvm-svn: 120297

- FileEntry::operator= is needed on Win32.
- There was an error in the S_ISDIR() macro.

llvm-svn: 120079

followed by an open for every source file we open, probe the file system with
'open' and then do an fstat when it succeeds.  open+fstat is faster than
stat+open because the kernel only has to perform the string->inode mapping
once.  Presumably it gets faster the deeper in your filesystem a lookup
happens.

For -Eonly on cocoa.h, this reduces system time from 0.042s to 0.039s on
my machine, a 7.7% speedup.

llvm-svn: 120066

leak a filedescriptor if a client ever starts returning one.

llvm-svn: 120062

llvm-svn: 120061

pointer that is passed down through the APIs, and make
FileSystemStatCache::get be the one that filters out
directory lookups that hit files.  This also paves the
way to have stat queries be able to return opened files.

llvm-svn: 120060

which simplifies clients and is important for future directions.
Add a FD member to FileEntry which isn't used but will be shortly.

llvm-svn: 120056

llvm-svn: 120048