[PATCH] D24693: [CodeGen] Don't emit lifetime intrinsics for some local variables

Vitaly Buka via cfe-commits cfe-commits at lists.llvm.org
Wed Sep 21 12:01:27 PDT 2016

vitalybuka added a comment.

Intrinsics are invalid there, code is generated in such way that variable is being accessed after lifetime.end.
I suspect that optimizer can make invalid code because of this, but I can't reproduce.
So I think it's safer to remove them at all and don't wait for miscompile reports.

Still if performance is greater concern than potential miscompiles, I can limit this only to asan-use-after-scope.


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