mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-04 07:32:13 +00:00
5324d80283
1) don't try to optimize a sext or zext that is only used by a trunc, let the trunc get optimized first. This avoids some pointless effort in some common cases since instcombine scans down a block in the first pass. 2) Change the cost model for zext elimination to consider an 'and' cheaper than a zext. This allows us to do it more aggressively, and for the next patch to simplify the code quite a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93097 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.