mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2025-01-31 20:51:52 +01:00
Yevgeny Rouban
0a4cf978a7
[RS4GC] Introduce intrinsics to get base ptr and offset
There can be a need for some optimizations to get (base, offset) for any GC pointer. The base can be calculated by generating needed instructions as it is done by the RewriteStatepointsForGC::findBasePointer() function. The offset can be calculated in the same way. Though to not expose the base calculation and to make the offset calculation as simple as ptrtoint(derived_ptr) - ptrtoint(base_ptr), which is illegal outside RS4GC, this patch introduces 2 intrinsics: @llvm.experimental.gc.get.pointer.base(%derived_ptr) @llvm.experimental.gc.get.pointer.offset(%derived_ptr) These intrinsics are inlined by RS4GC along with generation of statepoint sequences. With these new intrinsics the GC parseable lowering for atomic memcpy intrinsics (6ec2c5e402a724ba99bce82a9cac7a3006d660f4) could be implemented as a separate pass. Reviewed By: reames Differential Revision: https://reviews.llvm.org/D100445
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.
Description
Languages
C++
96.9%
C
1%
Python
1%
CMake
0.6%
OCaml
0.2%
Other
0.1%