Summary:
Added pair of directives .hsa_code_object_metadata/.end_hsa_code_object_metadata.
Between them user can put YAML string that would be directly put to the generated note. E.g.:
'''
.hsa_code_object_metadata
{
amd.MDVersion: [ 2, 0 ]
}
.end_hsa_code_object_metadata
'''
Based on D25046
Reviewers: vpykhtin, nhaustov, yaxunl, tstellarAMD
Subscribers: arsenm, kzhuravl, wdng, nhaehnle, mgorny, tony-tye
Differential Revision: https://reviews.llvm.org/D27619
llvm-svn: 290097