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We can conservatively know that CMOV's known bits are the intersection of known bits for each of its operands. This helps PerformCMOVToBFICombine find more opportunities. I tried hard to create a testcase for this and failed - we have to sufficiently confuse DAG.computeKnownBits which can see through all the cheap tricks I tried to narrow my larger testcase down :( This code is actually exercised in CodeGen/ARM/bfi.ll, there's just no functional difference because DAG.computeKnownBits gets the right answer in that case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252168 91177308-0d34-0410-b5e6-96231b3b80d8 |
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autoconf | ||
bindings | ||
cmake | ||
docs | ||
examples | ||
include | ||
lib | ||
projects | ||
resources | ||
test | ||
tools | ||
unittests | ||
utils | ||
.arcconfig | ||
.clang-format | ||
.clang-tidy | ||
.gitignore | ||
CMakeLists.txt | ||
CODE_OWNERS.TXT | ||
configure | ||
CREDITS.TXT | ||
LICENSE.TXT | ||
llvm.spec.in | ||
LLVMBuild.txt | ||
Makefile | ||
Makefile.common | ||
Makefile.config.in | ||
Makefile.rules | ||
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.