forked from OSchip/llvm-project
7a4d2df04a
Since we have distinct types for pointers and scalars, G_INTTOPTRs can sometimes obstruct attempts to find constant source values. These usually come about when try to do some kind of null pointer check. Teaching getConstantVRegValWithLookThrough about this operation allows the CBZ/CBNZ optimization to catch more cases. This change also improves the case where we can't find a constant source at all. Previously we would emit a cmp, cset and tbnz for that. Now we try to just emit a cmp and conditional branch, saving an instruction. The cumulative code size improvement of this change plus D64354 is 5.5% geomean on arm64 CTMark -O0. Differential Revision: https://reviews.llvm.org/D64377 llvm-svn: 365690 |
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| tools | ||
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| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
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| 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.