search for: rl228409

Displaying 3 results from an estimated 3 matches for "rl228409".

[poison] is select-of-select to logic+select allowed?
2017 May 22
5
[poison] is select-of-select to logic+select allowed?
Some InstCombine transforms for select-of-select were added here: https://reviews.llvm.org/rL228409 But Alive says this is more poisonous: Name: selsel %s1 = select i1 %cond1, i8 C1, i8 C2 %s2 = select i1 %cond2, i8 %s1, i8 C2 => %andcond = and i1 %cond1, %cond2 %s2 = select i1 %andcond, i8 C1, i8 C2 http://rise4fun.com/Alive/JT6 Are those transforms legal? -------------- next part -----...
[poison] is select-of-select to logic+select allowed?
2017 May 23
4
[poison] is select-of-select to logic+select allowed?
...means WRT poison/undef and (2) backing out some optimizations. This is going to be slightly painful but it is the only way forward. John On 5/22/17 2:32 PM, Sanjay Patel wrote: > Some InstCombine transforms for select-of-select were added here: > <https://reviews.llvm.org/rL228409> https://reviews.llvm.org/rL228409 > > But Alive says this is more poisonous: > > Name: selsel > %s1 = select i1 %cond1, i8 C1, i8 C2 > %s2 = select i1 %cond2, i8 %s1, i8 C2 > => > %andcond = and i1 %cond1, %cond2 > %s2 = select i1 %andcond, i8 C1, i8 C...
[poison] is select-of-select to logic+select allowed?
2017 May 23
6
[poison] is select-of-select to logic+select allowed?
...means WRT poison/undef and (2) backing out some optimizations. This is going to be slightly painful but it is the only way forward. John On 5/22/17 2:32 PM, Sanjay Patel wrote: > Some InstCombine transforms for select-of-select were added here: > <https://reviews.llvm.org/rL228409> https://reviews.llvm.org/rL228409 > > But Alive says this is more poisonous: > > Name: selsel > %s1 = select i1 %cond1, i8 C1, i8 C2 > %s2 = select i1 %cond2, i8 %s1, i8 C2 > => > %andcond = and i1 %cond1, %cond2 > %s2 = select i1 %andcond, i8 C1, i8 C...