[MachineLICM] Don't allow hoisting invariant loads across mem barrier… #9798
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llvm#116987) The improvements in 63917e1 / llvm#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: llvm#116987 (cherry picked from commit ef102b4)
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@swift-ci please test |
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@swift-ci please test llvm |
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…. (llvm#116987)
The improvements in 63917e1 / llvm#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: llvm#116987 (cherry picked from commit ef102b4)