forked from OSchip/llvm-project
796d906e06
remove copies that are useful after breaking some hardware dependencies. In other words, handle this kind of situations conservatively by assuming reg2 is redefined by the undef flag. reg1 = copy reg2 = inst reg2<undef> reg2 = copy reg1 Copy propagation used to remove the last copy. This is incorrect because the undef flag on reg2 in inst, allows next passes to put whatever trashed value in reg2 that may help. In practice we end up with this code: reg1 = copy reg2 reg2 = 0 = inst reg2<undef> reg2 = copy reg1 This fixes PR21743. llvm-svn: 235647 |
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| include | ||
| lib | ||
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| tools | ||
| unittests | ||
| utils | ||
| .arcconfig | ||
| .clang-format | ||
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| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| Makefile | ||
| Makefile.common | ||
| Makefile.config.in | ||
| Makefile.rules | ||
| README.txt | ||
| configure | ||
| llvm.spec.in | ||
README.txt
Low Level Virtual Machine (LLVM) ================================ 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're writing a package for LLVM, see docs/Packaging.rst for our suggestions.