llvm-project

ef102b4a - [MachineLICM] Don't allow hoisting invariant loads across mem barrier. (#116987)

[MachineLICM] Don't allow hoisting invariant loads across mem barrier. (#116987) The improvements in 63917e1 / #70796 do not check for memory barriers/unmodelled sideeffects, which means we may incorrectly hoist loads across memory barriers. Fix this by checking any machine instruction in the loop is a load-fold barrier. PR: https://github.com/llvm/llvm-project/pull/116987