forked from OSchip/llvm-project
9009d2905d
Currently getOptimalMemOpType returns i32 for large enough sizes without checking for alignment, leading to poor code generation when misaligned accesses aren't permitted as we generate a word store then later split it up into byte stores. This means we inadvertantly go over the MaxStoresPerMemcpy limit and for memset we splat the memset value into a word then immediately split it up again. Fix this by leaving it up to FindOptimalMemOpLowering to figure out which type to use, but also fix a bug there where it wasn't correctly checking if misaligned memory accesses are allowed. Differential Revision: https://reviews.llvm.org/D33442 llvm-svn: 303990 |
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