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Convergent functions and function parameters

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 Hähnle, Nicolai

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Convergent functions and function parameters
Subtitle
SPMD semantics for GPU programs
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611
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CC Attribution 2.0 Belgium:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Production Year2017

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Abstract
The `convergent` function attribute has been in LLVM for some time now tomodel restrictions e.g. on barrier intrinsics for GPUs. Recently, we've becomeaware of some additional restrictions that are required for the arguments ofcertain intrinsics in GPU code. The use of the `convergent` attribute onfunction parameters has been proposed for this purpose.