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[Doc][SYCL] Remove low-level implementation details from the doc #1022

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Merged
merged 3 commits into from
Jan 17, 2020
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[Doc][SYCL] Remove low-level implementation details from the doc #1022

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65fb1b9
[Doc][SYCL] Fix bugs in driver modes doc
Fznamznon Jan 17, 2020
bc70af9
Remove low-level implementation details from the doc
Fznamznon Jan 17, 2020
224190a
Update sycl/doc/SYCLCompilerAndRuntimeDesign.md
Fznamznon Jan 17, 2020
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14 changes: 4 additions & 10 deletions sycl/doc/SYCLCompilerAndRuntimeDesign.md
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Expand Up @@ -154,22 +154,16 @@ targets like SPIR-V).

#### Enable SYCL offload

To enable compilation following the SYCL specification, a special option
To enable compilation following single-source multiple compiler-passes (SMCP)
technique which is described in the SYCL specification, a special option
must be passed to the clang driver:

`-fsycl`

With this option specified, the driver will invoke the host SYCL compiler and a
number of device compilers for targets specified in the `-fsycl-targets`
option. If this option is not specified, then single SPIR-V target is assumed,
and single device compiler for this target is invoked.

In the driver, the following bools are defined to determine the compilation
mode in SYCL:

* IsSYCL : True if the user has passed `-fsycl-device-only` to the compilation
* IsSYCLOffloadDevice: True if calling clang to set up a device compilation
* IsSYCLHost: True if setting up a call to clang to do a host compilation
option. If `-fsycl-targets` is not specified, then single SPIR-V target is
assumed, and single device compiler for this target is invoked.

The option `-sycl-std` allows specifying which version of
the SYCL standard will be used for the compilation.
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