[PATCH] D32378: Insert invariant.group.barrier for pointers comparisons
Piotr Padlewski via Phabricator via cfe-commits
cfe-commits at lists.llvm.org
Mon Apr 24 03:28:25 PDT 2017
Prazek updated this revision to Diff 96371.
Prazek added a comment.
Don't add barrier if compared with nullptr. With this it reduces added
barriers to compares by half. Note that we will transform barrier(null) -> barrier
in llvm
https://reviews.llvm.org/D32378
Files:
lib/CodeGen/CGExprScalar.cpp
test/CodeGenCXX/strict-vtable-pointers.cpp
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