Bug 95038 - atomic_add and atomic_or cause a OpenCL crashes
Summary: atomic_add and atomic_or cause a OpenCL crashes
Status: RESOLVED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Other (show other bugs)
Version: 11.2
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: mesa-dev
QA Contact: mesa-dev
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Reported: 2016-04-20 19:06 UTC by rosenp
Modified: 2016-04-20 20:53 UTC (History)
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Description rosenp 2016-04-20 19:06:01 UTC 
No real idea if this is an issue for LLVM or for Mesa but on my r600g GPU(6520g) LLVM crashes when compiling an opencl kernel that uses either atomic_add or atomic_or. On LLVM 3.8 and mesa 11.2
Comment 1 Aaron Watry 2016-04-20 20:34:11 UTC 
Are the atomic_add/atomic_or operations causing the crash operating against local or global memory?

Last I checked, I think that atomics for r600g-based cards were only implemented in LLVM for the local memory space (while SI+ have both local/global implemented).

Someone may have gotten around to implementing support for global atomics for Evergreen/NI in LLVM while I wasn't looking, but I have no knowledge of it having been done.
Comment 2 rosenp 2016-04-20 20:53:30 UTC 
it's for global memory. looks like it's unimplemented according to the galliumcompute chart. Oh well.

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