yaxunl added inline comments.
================
Comment at: lib/Sema/SemaCast.cpp:2317
@@ +2316,3 @@
+ // OpenCL v2.0 s6.13.10 - Allow casts from '0' to event_t type.
+ if (Self.getLangOpts().OpenCL && DestType->isEventT()) {
+ llvm::APSInt intValue;
----------------
tstellarAMD wrote:
> A similar patch has been submitted and rejected several times:
>
> https://www.mail-archive.com/cfe-commits@cs.uiuc.edu/msg91067.html
>
> http://marc.info/?l=cfe-commits&m=141198505414824&w=2
>
> These were all before OpenCL 2.0. The 1.2 spec does not allow this, so I
> think this should be guarded by an OpenCL version check.
I opened a bug at khronos bugzilla requesting clarification of the issue:
https://cvs.khronos.org/bugzilla/show_bug.cgi?id=15609
I will keep you updated.
http://reviews.llvm.org/D17578
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