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between the two instructions. If there's a pattern like: $xA = ADRP foo @PAGE [some killing use of reg Xb] $Xb = ADDXri $Xa, 0, @PAGEOFF CollectLOH would create an AdrpAdd LOH that resulted in the linker optimizing this sequence into: $xB = ADR foo [some killing use of reg $Xb] ... and therefore clobbers the live $Xb register that was used by the instruction in between. This was discovered by a GlobalISel patch D78465 which broke up global variable accesses into two pseudos, which in some cases could be moved apart. Differential Revision: https://reviews.llvm.org/D80834 |
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| lib | ||
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| test | ||
| tools | ||
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| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| configure | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| llvm.spec.in | ||
| LLVMBuild.txt | ||
| README.txt | ||
| RELEASE_TESTERS.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.