From f0ad09f8f6818f84b33682c9f21b6a037b6693cc Mon Sep 17 00:00:00 2001 From: Argyrios Kyrtzidis Date: Thu, 14 Feb 2013 00:12:44 +0000 Subject: [PATCH] [docs] The stat cache has been removed from the PCH, update the docs to remove mentions of it. llvm-svn: 175109 --- clang/docs/PCHInternals.rst | 13 ++----------- clang/docs/UsersManual.rst | 7 +------ 2 files changed, 3 insertions(+), 17 deletions(-) diff --git a/clang/docs/PCHInternals.rst b/clang/docs/PCHInternals.rst index 6fe53d9..a36e65c 100644 --- a/clang/docs/PCHInternals.rst +++ b/clang/docs/PCHInternals.rst @@ -92,9 +92,7 @@ the actual precompiled header is required: .. code-block:: none - *** PCH Statistics: - 933 stat cache hits - 4 stat cache misses + *** AST File Statistics: 895/39981 source location entries read (2.238563%) 19/15315 types read (0.124061%) 20/82685 declarations read (0.024188%) @@ -214,10 +212,7 @@ The source manager block also contains information about all of the headers that were included when building the AST file. This includes information about the controlling macro for the header (e.g., when the preprocessor identified that the contents of the header dependent on a macro like -``LLVM_CLANG_SOURCEMANAGER_H``) along with a cached version of the results of -the ``stat()`` system calls performed when building the AST file. The latter -is particularly useful in reducing system time when searching for include -files. +``LLVM_CLANG_SOURCEMANAGER_H``). .. _pchinternals-preprocessor: @@ -425,10 +420,6 @@ file, inherits from all of these abstract classes to provide lazy deserialization of Clang's data structures. ``ASTReader`` implements the following abstract classes: -``StatSysCallCache`` - This abstract interface is associated with the ``FileManager`` class, and is - used whenever the file manager is going to perform a ``stat()`` system call. - ``ExternalSLocEntrySource`` This abstract interface is associated with the ``SourceManager`` class, and is used whenever the :ref:`source manager ` needs to diff --git a/clang/docs/UsersManual.rst b/clang/docs/UsersManual.rst index 75fc3bb..f82b34b 100644 --- a/clang/docs/UsersManual.rst +++ b/clang/docs/UsersManual.rst @@ -820,12 +820,7 @@ example, :option:`-isysroot /Developer/SDKs/MacOSX10.4u.sdk` will look for Relocatable precompiled headers are intended to be used in a limited number of cases where the compilation environment is tightly controlled and the precompiled header cannot be generated after headers have been -installed. Relocatable precompiled headers also have some performance -impact, because the difference in location between the header locations -at PCH build time vs. at the time of PCH use requires one of the PCH -optimizations, ``stat()`` caching, to be disabled. However, this change -is only likely to affect PCH files that reference a large number of -headers. +installed. Controlling Code Generation --------------------------- -- 2.7.4