llvm-project/clang
Gabor Marton 56b9b97c1e [clang][analyzer][ctu] Make CTU a two phase analysis
This new CTU implementation is the natural extension of the normal single TU
analysis. The approach consists of two analysis phases. During the first phase,
we do a normal single TU analysis. During this phase, if we find a foreign
function (that could be inlined from another TU) then we don’t inline that
immediately, we rather mark that to be analysed later.
When the first phase is finished then we start the second phase, the CTU phase.
In this phase, we continue the analysis from that point (exploded node)
which had been enqueued during the first phase. We gradually extend the
exploded graph of the single TU analysis with the new node that was
created by the inlining of the foreign function.

We count the number of analysis steps of the first phase and we limit the
second (ctu) phase with this number.

This new implementation makes it convenient for the users to run the
single-TU and the CTU analysis in one go, they don't need to run the two
analysis separately. Thus, we name this new implementation as "onego" CTU.

Discussion:
https://discourse.llvm.org/t/rfc-much-faster-cross-translation-unit-ctu-analysis-implementation/61728

Differential Revision: https://reviews.llvm.org/D123773
2022-05-18 10:35:52 +02:00
..
bindings Generalize "check-all" umbrella targets, use for check-clang-tools 2022-05-06 12:30:49 +02:00
cmake [CMake] Disable libedit in Fuchsia toolchain 2022-05-13 10:47:12 -07:00
docs [clang][analyzer][ctu] Make CTU a two phase analysis 2022-05-18 10:35:52 +02:00
examples clang-analyzer plugins require LLVM_ENABLE_PLUGINS also 2022-02-16 11:59:09 -05:00
include [clang][analyzer][ctu] Make CTU a two phase analysis 2022-05-18 10:35:52 +02:00
lib [clang][analyzer][ctu] Make CTU a two phase analysis 2022-05-18 10:35:52 +02:00
runtime Generalize "check-all" umbrella targets, use for check-clang-tools 2022-05-06 12:30:49 +02:00
test [clang][analyzer][ctu] Make CTU a two phase analysis 2022-05-18 10:35:52 +02:00
tools Add ThreadPriority::Low, and use QoS class Utility on Mac 2022-05-16 10:01:49 +02:00
unittests [clang][ASTImporter] Add isNewDecl 2022-05-18 10:35:52 +02:00
utils [RISCV][NFC] Refactor RISC-V vector intrinsic utils. 2022-05-16 15:13:05 +08:00
www Revert D119136 "[clang] Implement Change scope of lambda trailing-return-type" and its follow-up 2022-04-20 10:57:12 -07:00
.clang-format
.clang-tidy
.gitignore
CMakeLists.txt Generalize "check-all" umbrella targets, use for check-clang-tools 2022-05-06 12:30:49 +02:00
CODE_OWNERS.TXT
INSTALL.txt
LICENSE.TXT
ModuleInfo.txt
NOTES.txt
README.txt Replace links to archived mailing lists by links to Discourse forums 2022-03-23 10:10:20 -04:00

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 forums:
  https://discourse.llvm.org/c/clang/

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