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[OpenCL] Disallow negative attribute arguments

Authored by asavonic on Aug 3 2018, 8:51 AM.



Negative arguments in kernel attributes are silently bitcast'ed to
unsigned, for example:

__attribute__((reqd_work_group_size(1, -1, 1)))
__kernel void k() {}

is a complete equivalent of:

__attribute__((reqd_work_group_size(1, 4294967294, 1)))
__kernel void k() {}

This is likely an error, so the patch forbids negative arguments in
several OpenCL attributes. Users who really want 4294967294 can still
use it as an unsigned representation.

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asavonic created this revision.Aug 3 2018, 8:51 AM
This revision is now accepted and ready to land.Aug 17 2018, 7:44 AM
bader accepted this revision.Aug 17 2018, 8:03 AM
bader added a subscriber: bader.

Please, remove "Change-Id: I910b5c077f5f29e02a1572d9202f0fdbea5280fd" from the log message - it not relevant to the project.

yaxunl accepted this revision.Aug 17 2018, 2:58 PM

LGTM. Thanks.

asavonic edited the summary of this revision. (Show Details)Aug 20 2018, 12:36 AM
This revision was automatically updated to reflect the committed changes.