search for: d71126

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2020 Oct 08
2
Undef and Poison round table follow-up & a plan
...updated to introduce `poison` instead. For the step (2), we need an experimental result showing that it does not cause performance degradation. This relies on better support for freeze (the no-undef/poison analysis patches). *1. Introduce a new `poison` constant into IR*: https://reviews.llvm.org/D71126 Note that `poison` constant can be used as a true placeholder value as well. Undef cannot be used in general because it is less undefined than poison. *2. Update transformations that introduce `undef` to introduce `poison` instead* (1) There are transformations that introduce `undef` as a placeh...
2020 Oct 08
2
Undef and Poison round table follow-up & a plan
...(2), we need an experimental result showing that it does not >> cause >> performance degradation. This relies on better support for freeze (the >> no-undef/poison analysis patches). >> >> *1. Introduce a new `poison` constant into IR*: >> https://reviews.llvm.org/D71126 >> >> Note that `poison` constant can be used as a true placeholder value as >> well. >> Undef cannot be used in general because it is less undefined than poison. >> >> *2. Update transformations that introduce `undef` to introduce `poison` >> instead* >...
2020 Oct 09
2
Undef and Poison round table follow-up & a plan
...it does >>>> not cause >>>> performance degradation. This relies on better support for freeze (the >>>> no-undef/poison analysis patches). >>>> >>>> *1. Introduce a new `poison` constant into IR*: >>>> https://reviews.llvm.org/D71126 >>>> >>>> Note that `poison` constant can be used as a true placeholder value as >>>> well. >>>> Undef cannot be used in general because it is less undefined than >>>> poison. >>>> >>>> *2. Update transformations th...
2020 Oct 09
2
Undef and Poison round table follow-up & a plan
...>>>>> performance degradation. This relies on better support for freeze (the >>>>>> no-undef/poison analysis patches). >>>>>> >>>>>> *1. Introduce a new `poison` constant into IR*: >>>>>> https://reviews.llvm.org/D71126 >>>>>> >>>>>> Note that `poison` constant can be used as a true placeholder value >>>>>> as well. >>>>>> Undef cannot be used in general because it is less undefined than >>>>>> poison. >>>>>&gt...
2020 Oct 10
2
Undef and Poison round table follow-up & a plan
...er support for freeze >>>>>>>> (the >>>>>>>> no-undef/poison analysis patches). >>>>>>>> >>>>>>>> *1. Introduce a new `poison` constant into IR*: >>>>>>>> https://reviews.llvm.org/D71126 >>>>>>>> >>>>>>>> Note that `poison` constant can be used as a true placeholder value >>>>>>>> as well. >>>>>>>> Undef cannot be used in general because it is less undefined than >>>>>>...