Page MenuHomePhabricator

liuz (Zhengyang Liu)
User

Projects

User does not belong to any projects.

User Details

User Since
Sep 20 2017, 9:18 PM (156 w, 3 d)

Recent Activity

Dec 6 2019

liuz updated the summary of D71126: Add Poison Value.
Dec 6 2019, 9:18 AM · Restricted Project
Herald added a reviewer for D71126: Add Poison Value: whitequark.
Dec 6 2019, 8:57 AM · Restricted Project

Nov 17 2019

liuz added a comment to D70246: [InstCombine] remove identity shuffle simplification for mask with undefs.

Converting poison to undef is okay, but undef to poison is not. undef & 0 == undef, but poison & 0 == poison. If undef can be optimized to poison, this can cause miscompilation. See here: https://rise4fun.com/Alive/DFYf , https://rise4fun.com/Alive/OZU

Nov 17 2019, 11:09 PM · Restricted Project