mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-04-06 09:44:39 +00:00
944aaeb28b
While completely undefined registers are easy to catch and get their <undef> flag early in ProcessImplicitDefs/RegisterCoalescer reading from a partially defined register where just the subreg happens to be undefined is harder to catch so we only add the undef flag in the virtual register rewriting step. No testcase as I cannot reproduce the problem on any of the in-tree targets at the moment. This fixes rdar://21387089 Differential Revision: http://reviews.llvm.org/D10470 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239838 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.