http://llvm.org/bugs/show_bug.cgi?id=19699
Bug ID: 19699
Summary: Clang accepts OpenCL attribute req_workgroup_size of 0
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 12498
--> http://llvm.org/bugs/attachment.cgi?id=12498&action=edit
Patch to add validation
OpenCL allows us to define the workgroup size used in a kernel in order to
further optimise the code, specifically to that size.
The syntax is
__attribute__((reqd_work_group_size(X, Y, Z)))
where X, Y and Z are compile-time known integers.
Currently clang allows any of those to be 0, which would be illegal in OpenCL.
The attached patch adds this validation; it's currently a draft and any
comments would be welcome.
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