llvm-project/clang
Peter Collingbourne 5f85a9deda IR: Use pointers instead of GUIDs to represent edges in the module summary. NFCI.
When profiling a no-op incremental link of Chromium I found that the functions
computeImportForFunction and computeDeadSymbols were consuming roughly 10% of
the profile. The goal of this change is to improve the performance of those
functions by changing the map lookups that they were previously doing into
pointer dereferences.

This is achieved by changing the ValueInfo data structure to be a pointer to
an element of the global value map owned by ModuleSummaryIndex, and changing
reference lists in the GlobalValueSummary to hold ValueInfos instead of GUIDs.
This means that a ValueInfo will take a client directly to the summary list
for a given GUID.

Differential Revision: https://reviews.llvm.org/D32471

llvm-svn: 302108
2017-05-04 03:36:16 +00:00
..
INPUTS
bindings Add Python 3 support to clang.cindex 2017-04-20 10:11:01 +00:00
cmake [CMake] Enable ARM target in Fuchsia toolchain 2017-04-20 23:06:53 +00:00
docs Revert "[docs] UBSan: Mention that print_stacktrace=1 is unsupported on Darwin" 2017-05-02 18:51:41 +00:00
examples Add LLVMOption to clang-interpreter, corresponding to r291938. 2017-01-14 08:54:05 +00:00
include Add #pragma clang module begin/end pragmas and generate them when preprocessing a module. 2017-05-04 00:29:54 +00:00
lib IR: Use pointers instead of GUIDs to represent edges in the module summary. NFCI. 2017-05-04 03:36:16 +00:00
runtime [sanitizer] Passthrough CMAKE_OSX_DEPLOYMENT_TARGET and CMAKE_OSX_SYSROOT when building compiler-rt from clang/runtime/CMakeLists.txt 2016-12-15 23:20:54 +00:00
test Add #pragma clang module begin/end pragmas and generate them when preprocessing a module. 2017-05-04 00:29:54 +00:00
tools [modules] Round-trip -Werror flag through explicit module build. 2017-05-03 00:28:49 +00:00
unittests [modules] Round-trip -Werror flag through explicit module build. 2017-05-03 00:28:49 +00:00
utils utils: Silence -Wpedantic warning 2017-05-01 00:26:59 +00:00
www Implement DR 373 "Lookup on namespace qualified name in using-directive" 2017-03-17 21:41:20 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore
CMakeLists.txt [analyzer] Add new Z3 constraint manager backend 2017-04-04 19:52:25 +00:00
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt

README.txt

//===----------------------------------------------------------------------===//
// C Language Family Front-end
//===----------------------------------------------------------------------===//

Welcome to Clang.  This is a compiler front-end for the C family of languages
(C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM
compiler infrastructure project.

Unlike many other compiler frontends, Clang is useful for a number of things
beyond just compiling code: we intend for Clang to be host to a number of
different source-level tools.  One example of this is the Clang Static Analyzer.

If you're interested in more (including how to build Clang) it is best to read
the relevant web sites.  Here are some pointers:

Information on Clang:              http://clang.llvm.org/
Building and using Clang:          http://clang.llvm.org/get_started.html
Clang Static Analyzer:             http://clang-analyzer.llvm.org/
Information on the LLVM project:   http://llvm.org/

If you have questions or comments about Clang, a great place to discuss them is
on the Clang development mailing list:
  http://lists.llvm.org/mailman/listinfo/cfe-dev

If you find a bug in Clang, please file it in the LLVM bug tracker:
  http://llvm.org/bugs/