mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-04-06 09:44:39 +00:00
d2ed2d71c9
EXTRACT_SUBREG is emitted as %dst = COPY %src:sub, so there is no need to constrain the %dst register class. RegisterCoalescer will apply the necessary constraints if it decides to eliminate the COPY. The %src register class does need to be constrained to something with the right sub-registers, though. This is currently done manually with COPY_TO_REGCLASS nodes. They can possibly be removed after this patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141207 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 HTML documentation provided in docs/index.html for further assistance with LLVM. If you're writing a package for LLVM, see docs/Packaging.html for our suggestions.