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14 Commits

Author SHA1 Message Date
Argyrios Kyrtzidis 3b7793797f Extend stat query APIs to explicitly specify if the query is for 
a file or directory, allowing just a stat call if a file descriptor
is not needed.

Doing just 'stat' is faster than 'open/fstat/close'.
This has the effect of cutting down system time for validating the input files of a PCH.

llvm-svn: 169831
 2012-12-11 07:48:23 +00:00
David Blaikie 68e081d606 Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch 
llvm-svn: 146959
 2011-12-20 02:48:34 +00:00
Michael J. Spencer f28df4cdba Replace all uses of PathV1::isAbsolute with PathV2::is_{absolute,relative}. 
llvm-svn: 122087
 2010-12-17 21:22:22 +00:00
Chris Lattner 4fc8fb09d0 attempt to fix a buildbot failure, apparently apache fails to build. 
llvm-svn: 120688
 2010-12-02 04:27:29 +00:00
Michael J. Spencer 8aaf49959c Merge System into Support. 
llvm-svn: 120297
 2010-11-29 18:12:39 +00:00
Francois Pichet 31ee8bfb0e Fix 2 problems with Chris Lattner's FileManager redesign on Windows. 
- FileEntry::operator= is needed on Win32.
- There was an error in the S_ISDIR() macro.

llvm-svn: 120079
 2010-11-24 03:07:43 +00:00
Chris Lattner 5ea7d07d2a The final result of all this refactoring: instead of doing stat immediately 
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
 2010-11-23 22:32:37 +00:00
Chris Lattner f77e11ba05 if we succeed in opening a directory but expected a file, ensure we don't 
leak a filedescriptor if a client ever starts returning one.

llvm-svn: 120062
 2010-11-23 21:53:56 +00:00
Chris Lattner dd278430a3 change the 'is directory' indicator to be a null-or-not 
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
 2010-11-23 21:17:56 +00:00
Chris Lattner ea61b32c4a replicate a terrible hack to fix a build error on VC++ 
llvm-svn: 120039
 2010-11-23 20:07:39 +00:00
Chris Lattner 8f0583daa2 simplify the cache miss handling code, eliminating CacheMissing. 
llvm-svn: 120038
 2010-11-23 20:05:15 +00:00
Chris Lattner b3c814538b r120013 dropped passing in the precomputed file size to 
MemoryBuffer::getFile, causing us to pick up a fstat for
every file.  Restore the optimization.

llvm-svn: 120032
 2010-11-23 19:38:22 +00:00
Chris Lattner 2a6fa47b26 PCH files only cache successful stats. Remove the code that reads/writes 
the result code of the stat to/from the PCH file since it is always 0.

llvm-svn: 120031
 2010-11-23 19:28:12 +00:00
Chris Lattner 226efd356c rework the stat cache, pulling it out of FileManager.h into 
its own header and giving it some more structure.  No 
functionality change.

llvm-svn: 120030
 2010-11-23 19:19:34 +00:00