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| author | Dmitri Gribenko <gribozavr@gmail.com> | 2012-12-23 18:39:54 +0000 |
|---|---|---|
| committer | Dmitri Gribenko <gribozavr@gmail.com> | 2012-12-23 18:39:54 +0000 |
| commit | 029e70cef6355da737f69e3a88b3a7b06ac9a07f (patch) | |
| tree | 499961bed425ba326f47db9f0a5bfa500e01ca30 | |
| parent | 184e1c4495298fd1c39dc1fbd82ff6d969c17ecf (diff) | |
Documentation: PTHInternals: use correct adornments and fix typos
Fixes PR14014
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171005 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | docs/PTHInternals.rst | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/docs/PTHInternals.rst b/docs/PTHInternals.rst index 55c0192877..10dda6117b 100644 --- a/docs/PTHInternals.rst +++ b/docs/PTHInternals.rst @@ -60,7 +60,7 @@ lexing and preprocessing of a source file, while parsing and type-checking must be completely redone every time a PTH file is used. Basic Design Tradeoffs -~~~~~~~~~~~~~~~~~~~~~~ +---------------------- In the long term there are plans to provide an alternate PCH implementation for Clang that also caches the work for parsing and type @@ -89,7 +89,7 @@ features: **Architecture independence** In contrast to GCC's PCH files (and those of several other compilers), Clang's PTH files are architecture - independent, requiring only a single PTH file when building an + independent, requiring only a single PTH file when building a program for multiple architectures. For example, on Mac OS X one may wish to compile a "universal binary" @@ -142,7 +142,7 @@ advantages just mentioned but would also retain some of the strengths of PTH such as reduced memory pressure (ideal for multi-core builds). Internal PTH Optimizations -~~~~~~~~~~~~~~~~~~~~~~~~~~ +-------------------------- While the main optimization employed by PTH is to reduce lexing time of header files by caching pre-lexed tokens, PTH also employs several other @@ -154,7 +154,7 @@ optimizations to speed up the processing of header files: involved in context-switching to the kernel to resolve included files. -- Fasting skipping of ``#ifdef``... ``#endif`` chains: PTH files +- Fast skipping of ``#ifdef`` ... ``#endif`` chains: PTH files record the basic structure of nested preprocessor blocks. When the condition of the preprocessor block is false, all of its tokens are immediately skipped instead of requiring them to be handled by |