Commit Graph

3 Commits

Author SHA1 Message Date
NAKAMURA Takumi e00c986897 clang/GlobalModuleIndex: Don't open the same file twice. Use raw_fd_ostream(fd, ...) instead.
FIXME: PathV2::unique_file() is assumed to open the file with binary mode on win32.
llvm-svn: 173330
2013-01-24 08:20:11 +00:00
Douglas Gregor 8ec343ccb1 Fix for case-sensitive file systems. Ugh
llvm-svn: 173303
2013-01-23 22:45:24 +00:00
Douglas Gregor 5e306b1233 Implement the writer side of the global module index.
The global module index is a "global" index for all of the module
files within a particular subdirectory in the module cache, which
keeps track of all of the "interesting" identifiers and selectors
known in each of the module files. One can perform a fast lookup in
the index to determine which module files will have more information
about entities with a particular name/selector. This information can
help eliminate redundant lookups into module files (a serious
performance problem) and help with creating auto-import/auto-include
Fix-Its.

The global module index is created or updated at the end of a
translation unit that has triggered a (re)build of a module by
scraping all of the .pcm files out of the module cache subdirectory,
so it catches everything. As with module rebuilds, we use the file
system's atomicity to synchronize.

llvm-svn: 173301
2013-01-23 22:38:11 +00:00