PR for llvm/llvm-project#68783 #730
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(cherry picked from commit 0ead1faef0bfaea499c3b2d13ab417f6bf3f67e1)
This custom combine currently converts `and(anyext(x),c)` into `anyext(and(x,c))`. This is not correct, because the original expression guaranteed that the high bits are zero, while the new one sets them to undef. Emit `zext(and(x,c))` instead. Fixes llvm/llvm-project#68783. (cherry picked from commit 127ed9ae266ead58aa525f74f4c86841f6674793)
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Test failures are legitimate. It looks like the instructions scheduling is slightly different with LLVM 17. |
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Superseded by #731, this one can be closed. |
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resolves llvm/llvm-project#68783