mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-23 00:20:25 +00:00
61c6f9e581
------------------------------------------------------------------------ r243519 | wschmidt | 2015-07-29 07:31:57 -0700 (Wed, 29 Jul 2015) | 14 lines [PPC] Fix PR24216: Don't generate splat for misaligned shuffle mask Given certain shuffle-vector masks, LLVM emits splat instructions which splat the wrong bytes from the source register. The issue is that the function PPC::isSplatShuffleMask() in PPCISelLowering.cpp does not ensure that the splat pattern found is requesting bytes that are aligned on an EltSize boundary. This patch detects this situation as not a valid splat mask, resulting in a permute being generated instead of a splat. Patch and test case by Tyler Kenney, cleaned up a bit by me. This is a simple bug fix that would be good to incorporate into 3.7. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_37@243528 91177308-0d34-0410-b5e6-96231b3b80d8
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're writing a package for LLVM, see docs/Packaging.rst for our suggestions.