Commit Graph

2 Commits

Author SHA1 Message Date
Justin Lebar 1fdb5e6942 [NVPTX] Mark nvvm synchronizing intrinsics as convergent.
Summary:
This is the attribute purpose-made for e.g. __syncthreads.  It appears
that NoDuplicate may not be sufficient to prevent Sink from touching a
call to __syncthreads.

Reviewers: jingyue, hfinkel

Subscribers: llvm-commits, jholewinski, jhen, rnk, tra, majnemer

Differential Revision: http://reviews.llvm.org/D16941

llvm-svn: 260005
2016-02-06 19:32:44 +00:00
Eli Bendersky 2281ef91e6 Expose "noduplicate" attribute as a property for intrinsics.
The "noduplicate" function attribute exists to prevent certain optimizations
from duplicating calls to the function. This is important on platforms where
certain function call duplications are unsafe (for example execution barriers
for CUDA and OpenCL).

This patch makes it possible to specify intrinsics as "noduplicate" and
translates that to the appropriate function attribute.

llvm-svn: 204200
2014-03-18 23:51:07 +00:00