9ec9f444cc
Previously, the MIPS backend would alwyas break down constant multiplications into a series of shifts, adds, and subs. This patch changes that so the cost of doing so is estimated. The cost is estimated against worst case constant materialization and retrieving the results from the HI/LO registers. For cases where the value type of the multiplication is not legal, the cost of legalization is estimated and is accounted for before performing the optimization of breaking down the constant This resolves PR36884. Thanks to npl for reporting the issue! Reviewers: abeserminji, smaksimovic Differential Revision: https://reviews.llvm.org/D45316 llvm-svn: 330037
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.