kzhuravl added a comment. In https://reviews.llvm.org/D31210#706880, @rampitec wrote:
> I'm concerned about the default address space to be 64 bit. It would move > alloca into generic address space effectively making private address to be 64 > bit. > This may have very undesirable performance implications, like address > arithmetic can become expensive 64 bit and only be truncated at load or store. > I realize you will use addrspacecast on an alloca's value, though I'm not > sure that is sufficient to mitigate performance hit. > I believe such change shall not be made without a good performance > comparison with the feature enabled, provided the very likely performance > issues. Did not we want to use this: http://lists.llvm.org/pipermail/llvm-dev/2017-March/111199.html and use non-0 for our allocas? https://reviews.llvm.org/D31210 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
