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from 3074f79 [SelectionDAG] We can ignore knownbits from an undef shuffle [...] new 9c3d059 GlobalISel: fall back gracefully when we hit unhandled legali [...] new 02d8347 [InstSimplify] add folds for and-of-icmps with same operands new 6e9255f [DAGCombine] Add (sext_in_reg (zext x)) -> (sext x) combine

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Summary of changes: lib/Analysis/InstructionSimplify.cpp | 33 +++ lib/CodeGen/GlobalISel/LegalizerInfo.cpp | 4 +- lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 9 + test/CodeGen/AArch64/GlobalISel/arm64-fallback.ll | 8 + test/CodeGen/X86/combine-sext-in-reg.ll | 12 - test/Transforms/InstSimplify/and-icmps-same-ops.ll | 255 +++++---------------- 6 files changed, 111 insertions(+), 210 deletions(-)