forked from OSchip/llvm-project
6f6d2d2383
As shown in PR46237: https://bugs.llvm.org/show_bug.cgi?id=46237 The size-savings win for hoisting an 8-bit ALU immediate (intentionally excluding store constants) requires extreme conditions; it may not even be possible when including REX prefix bytes on x86-64. I did draft a version of this patch that included use counts after the loop, but I suspect that accounting is not working as expected. I think that is because the number of constant uses are changing as we select instructions (for example as we transform shl/add into LEA). Differential Revision: https://reviews.llvm.org/D81468 |
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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.