[cfe-dev] sizeof(long) in OpenCL C

[Erik Schnetter]

The OpenCL C language requires that sizeof(long)=8, independent of the architecture. This is not what Clang currently implements.

How would I change this in clang? This issue is currently preventing supporting the "long" and (as a consequence) "double" type for 32-bit architectures in pocl <http://pocl.sourceforge.net/>.

I see that the file lib/Basic/TargetInfo.cpp defines e.g. "LongWidth = LongAlign = 32;". It seems that this definition should depend on the language chosen (-x cl) -- would this be the correct approach? What about all the targets that inherit from TargetInfo -- should they also receive the corresponding modification? How do I determine the current language in Clang?

Or would it be better to override these values after the TargetInfo object has been created? Is there already a language hook for this?

Any pointers, suggestions, or ideas for this would be appreciated.

-erik

-- 
Erik Schnetter <schnetter at gmail.com>
http://www.perimeterinstitute.ca/personal/eschnetter/

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