mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
Mirror of https://github.com/RPCS3/llvm-mirror
1540d39c62
This patch extends the pattern-matching capability of vector-splatted constants. When illegally-typed constants are legalized they are canonically sign-extended to XLenVT. This preserves the sign and allows us to match simm5. If they were zero-extended for whatever reason we'd lose that ability: e.g. `(i8 -1) -> (XLenVT 255)` would not be matched under the current logic. To address this we first manually sign-extend the splatted constant from the vector element type to int64_t. This preserves the semantics while removing any implicitly-truncated bits. The corresponding logic for uimm5 was not updated, the rationale being that neither sign- nor zero-extending a legal uimm5 immediate should change that (unless we expect actual "garbage" upper bits). Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D93837 |
||
|---|---|---|
| benchmarks | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitattributes | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| configure | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| llvm.spec.in | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
The LLVM Compiler Infrastructure ================================ 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 are writing a package for LLVM, see docs/Packaging.rst for our suggestions.