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Jakub makes a good point, are you sure that there is no single shadow offset value that works for all VMA variants? What exactly breaks when 1<<36 is used on 42-bit VMA? On Fri, Sep 25, 2015 at 3:28 AM, Yury Gribov via llvm-dev <llvm-dev at lists.llvm.org> wrote: > On 09/25/2015 01:27 PM, Yury Gribov wrote: >> >> On 09/25/2015 11:53 AM, Jakub Jelinek via llvm-dev

...that at least > those two settings work, the question is if 48-bit VMA (or how many) works > too, and if it does, the next thing is tweaking the library so that it can > perhaps with some small but still acceptable performance hit decide between > those at runtime (e.g. kAllocatorSpace/kAllocatorSize could be turned into > non-const variables for aarch64, harder would be to add some allocator that > at runtime picks if it uses 32-bit or 64-bit allocator. Hi Jakub, My assumption is based on what I understood from my talks with various people in sanitizers, libraries, GCC, LLVM and the ke...