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8404b23acd
This revision introduces support for memset intrinsics in SROA and mem2reg for the LLVM dialect. This is achieved for SROA by breaking memsets of aggregates into multiple memsets of scalars, and for mem2reg by promoting memsets of single integer slots into the value the memset operation would yield. The SROA logic supports breaking memsets of static size operating at the start of a memory slot. The intended most common case is for memsets covering the entirety of a struct, most often as a way to initialize it to 0. The mem2reg logic supports dynamic values and static sizes as input to promotable memsets. This is achieved by lowering memsets into `ceil(log_2(n))` LeftShift operations, `ceil(log_2(n))` Or operations and up to one ZExt operation (for n the byte width of the integer), computing in registers the integer value the memset would create. Only byte-aligned integers are supported, more types could easily be added afterwards. Reviewed By: gysit Differential Revision: https://reviews.llvm.org/D152367 |
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| benchmark/python | ||
| cmake/modules | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| python | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .clang-format | ||
| .clang-tidy | ||
| CMakeLists.txt | ||
| LICENSE.TXT | ||
| README.md | ||
Multi-Level Intermediate Representation
See https://mlir.llvm.org/ for more information.