mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-04-06 09:44:39 +00:00
01b3858e66
lowering to match VZEXT_MOVL patterns. I hadn't realized that these had sufficient pattern smarts in the backend to lower zext-ing from the low element of a vector without it being a scalar_to_vector node. They do, and this is how to match a bunch of patterns for movq, movss, etc. There is a weird propensity to end up using pshufd to place the element afterward even though it means domain crossing (or rather, to use xorps+movss to zext the element rather than movq) but that's an orthogonal problem with VZEXT_MOVL that someone should probably look at. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218977 91177308-0d34-0410-b5e6-96231b3b80d8
Low Level Virtual Machine (LLVM) ================================ This directory and its subdirectories contain source code for the Low Level Virtual Machine, 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.