From 8c42a67645145a7673d0313da7dcbab2b66f5611 Mon Sep 17 00:00:00 2001
From: Argyrios Kyrtzidis <akyrtzi@gmail.com>
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.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175109 91177308-0d34-0410-b5e6-96231b3b80d8
---
docs/PCHInternals.rst | 13 ++-----------
docs/UsersManual.rst | 7 +------
2 files changed, 3 insertions(+), 17 deletions(-)
diff --git a/docs/PCHInternals.rst b/docs/PCHInternals.rst
index 6fe53d93163..a36e65c199c 100644
--- a/docs/PCHInternals.rst
+++ b/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 <pchinternals-sourcemgr>` needs to
diff --git a/docs/UsersManual.rst b/docs/UsersManual.rst
index 75fc3bbc38e..f82b34b2876 100644
--- a/docs/UsersManual.rst
+++ b/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
---------------------------
--
GitLab