llvm-project

27651133 - AMDGPU: Drop and upgrade llvm.amdgcn.atomic.csub/cond.sub to atomicrmw (#105553)

AMDGPU: Drop and upgrade llvm.amdgcn.atomic.csub/cond.sub to atomicrmw (#105553) These both perform conditional subtraction, returning the minuend and zero respectively, if the difference is negative.