| commit | fdaccc9069203d753367ad1ec50da7ac7a601a7a | [log] [tgz] |
|---|---|---|
| author | Austin Kerbow <Austin.Kerbow@amd.com> | Thu May 29 10:28:16 2025 -0700 |
| committer | Austin Kerbow <Austin.Kerbow@amd.com> | Thu May 29 12:37:10 2025 -0700 |
| tree | fdee6c85521e920b2c8fd6b89c31b5446e7f50d0 | |
| parent | 551d49cdb677b09d44f1b253de87de32fefa94d3 [diff] |
[AMDGPU] Handle direct loads to LDS in memory model Add additional waitcnt insertion to ensure proper ordering between LDS operations and direct loads from global memory to LDS on pre-GFX10 hardware. Direct LDS loads perform both a global memory load and an LDS store, which can be reordered with respect to other LDS operations without explicit synchronization. This can cause ordering violations even within a single thread. The change conservatively inserts vmcnt(0) waits for all sync scopes when the LDS address space is involved. Future optimizations in SIInsertWaitcnts can relax this to only wait for outstanding direct LDS loads rather than all vmcnt events. This change only affects LDS address space synchronization and preserves existing cross-address space ordering behavior.
Welcome to the LLVM project!
This repository contains the source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and run-time environments.
The LLVM project has multiple components. The core of the project is itself called “LLVM”. This contains all of the tools, libraries, and header files needed to process intermediate representations and convert them into object files. Tools include an assembler, disassembler, bitcode analyzer, and bitcode optimizer.
C-like languages use the Clang frontend. This component compiles C, C++, Objective-C, and Objective-C++ code into LLVM bitcode -- and from there into object files, using LLVM.
Other components include: the libc++ C++ standard library, the LLD linker, and more.
Consult the Getting Started with LLVM page for information on building and running LLVM.
For information on how to contribute to the LLVM project, please take a look at the Contributing to LLVM guide.
Join the LLVM Discourse forums, Discord chat, LLVM Office Hours or Regular sync-ups.
The LLVM project has adopted a code of conduct for participants to all modes of communication within the project.