[llvm-bugs] [Bug 234098] [CodeGenPrepare] `optimizeExtUses` makes a sign check read `poison` through `zext nneg`

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Wed Oct 21 00:37:22 PDT 2026

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Previous message: [llvm-bugs] [Bug 234080] [mlir][gpu] -control-flow-sink moves gpu.shuffle / gpu.ballot into lane-divergent scf.if (wrong results on GPU)
Next message: [llvm-bugs] [Bug 234099] [NewGVN] Pointer equality propagation breaks noalias, causing a miscompile with newgvn, gvn
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