forked from OSchip/llvm-project
d7a05698ef
It is possible that LowerSwitch pass leaves certain blocks unreachable from the entry. If not removed, these dead blocks can cause undefined behavior in the subsequent passes. It caused a crash in the AMDGPU backend after the instruction selection when a PHI node has its incoming values coming from these unreachable blocks. In the AMDGPU pass flow, the last invocation of UnreachableBlockElim precedes where LowerSwitch is currently placed and eventually missed out on the opportunity to get these blocks eliminated. This patch ensures that LowerSwitch pass get inserted earlier to make use of the existing unreachable block elimination pass. Reviewed By: sameerds, arsenm Differential Revision: https://reviews.llvm.org/D83584 |
||
|---|---|---|
| .. | ||
| 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 | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
| configure | ||
| llvm.spec.in | ||
README.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.