f02ac0eeb2
Emit SHRQ/SHLQ instead of ANDQ with a 64 bit constant mask if the result is unused and the mask has only higher/lower bits set. For example, with this patch LLVM emits shrq $41, %rdi je instead of movabsq $0xFFFFFE0000000000, %rcx testq %rcx, %rdi je This reduces number of instructions, code size and register pressure. The transformation is applied only for cases where the mask cannot be encoded as an immediate value within TESTQ instruction. Differential Revision: https://reviews.llvm.org/D28198 llvm-svn: 291806 |
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| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .arcconfig | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.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 are writing a package for LLVM, see docs/Packaging.rst for our suggestions.