mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 11:13:28 +01:00
Mirror of https://github.com/RPCS3/llvm-mirror
c23e92dedc
Summary: This is RFC for fixes in poison-related functions of ValueTracking. These functions assume that a value can be poison bitwisely, but the semantics of bitwise poison is not clear at the moment. Allowing a value to have bitwise poison adds complexity to reasoning about correctness of optimizations. This patch makes the analysis functions simply assume that a value is either fully poison or not, which has been used to understand the correctness of a few previous optimizations. The bitwise poison semantics seems to be only used by these functions as well. In terms of implementation, using value-wise poison concept makes existing functions do more precise analysis, which is what this patch contains. Reviewers: spatel, lebedev.ri, jdoerfert, reames, nikic, nlopes, regehr Reviewed By: nikic Subscribers: fhahn, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D78503 |
||
|---|---|---|
| benchmarks | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitattributes | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| configure | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| llvm.spec.in | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
The LLVM Compiler Infrastructure ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.