[SYCL][Driver] Fix autodetection of the -Xsycl-target-backend triple #4463
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added 3 commits
September 2, 2021 12:53
intel#4175 introduced automatic addition of the generic spir64 device target when any section of the input objects had this triple assigned to it. As a result, the actual list of toolchains started exceeding the user-provided one by 1 item. After intel#4239, the above became a problem. The dispatch of -Xsycl-target-* arguments started happening earlier in theflow, which broke the following use-case: ``` clang++ -fsycl -fsycl-targets=spir64_gen gen-obj.o gen-and-spir64-obj.o -Xsycl-target-backend "-device *" ``` A fix for now is to ignore the autodetected spir64 target when propagating the -Xsycl-target-backend arguments. A permanent solution would involve a re-design of -Xsycl-target-backend handling so that it took place only once in the flow, or belating the addition of the autodetected generic triple into the list of device targets. Signed-off-by: Artem Gindinson <artem.gindinson@intel.com>
Signed-off-by: Artem Gindinson <artem.gindinson@intel.com>
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Will investigate the Linux failures; I do observe the same crashes locally. |
mdtoguchi
reviewed
Sep 2, 2021
added 2 commits
September 3, 2021 08:23
Signed-off-by: Artem Gindinson <artem.gindinson@intel.com>
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TODO:
UPD: My mistake, re-building the older version correctly introduces the regression back, so nothing to do here. |
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#4175 introduced automatic addition
of the generic spir64 device target when any section of the input
objects had this triple assigned to it. As a result, the actual list
of toolchains started exceeding the user-provided one by 1 item.
After #4239, the above became a
problem. The dispatch of -Xsycl-target-* arguments started happening
earlier in theflow, which broke the following use-case:
The fix is to hold off the autodetected generic triple addition until the
GPU architectures have been set based off
-Xsycl-target-backend --offload-arch=values.Signed-off-by: Artem Gindinson artem.gindinson@intel.com