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| author | James Miller <james@aatch.net> | 2017-02-21 21:08:06 +1300 |
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| committer | James Miller <james@aatch.net> | 2017-02-21 21:08:06 +1300 |
| commit | 7af3406a49eb27f54d043cc45e99b986c7f05d7c (patch) | |
| tree | 2b2d58dce5cf78565d743ca14a7baa832eb1de56 /src/test/codegen/function-arguments.rs | |
| parent | a17e5e2949db53c9c1e3a697e41c254e31c0bdf3 (diff) | |
| download | rust-7af3406a49eb27f54d043cc45e99b986c7f05d7c.tar.gz rust-7af3406a49eb27f54d043cc45e99b986c7f05d7c.zip | |
Set metadata for vtable-related loads
Give LLVM much more information about vtable pointers. Without the extra information, LLVM has to be rather pessimistic about vtables, preventing a number of obvious optimisations. * Makes the vtable pointer argument noalias and readonly. * Marks loads of the vtable pointer as nonnull. * Marks load from the vtable with `!invariant.load` metadata. Fixes #39992
Diffstat (limited to 'src/test/codegen/function-arguments.rs')
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