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from 1e3c4790abc AMDGPU: Use MachineInstr::mayAlias to replace areMemAccesse [...] new 09f3b5ecb16 [CGP] form usub with overflow from sub+icmp new 1d3cbd73312 [GlobalISel][AArch64] Legalize + select some llvm.ctlz.* in [...]

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Summary of changes: include/llvm/CodeGen/TargetLowering.h | 17 ++ lib/CodeGen/CodeGenPrepare.cpp | 91 ++++++++-- lib/CodeGen/GlobalISel/LegalizerHelper.cpp | 1 + lib/Target/AArch64/AArch64LegalizerInfo.cpp | 4 + lib/Target/X86/X86ISelLowering.cpp | 7 + lib/Target/X86/X86ISelLowering.h | 5 + .../GlobalISel/legalizer-info-validation.mir | 2 +- test/CodeGen/AArch64/GlobalISel/select-ctlz.mir | 200 +++++++++++++++++++++ test/CodeGen/AArch64/arm64-clrsb.ll | 10 ++ test/CodeGen/AArch64/arm64-vclz.ll | 17 ++ test/CodeGen/X86/cgp-usubo.ll | 45 ++--- test/CodeGen/X86/lsr-loop-exit-cond.ll | 42 +++-- .../CodeGenPrepare/X86/overflow-intrinsics.ll | 81 +++++---- 13 files changed, 422 insertions(+), 100 deletions(-) create mode 100644 test/CodeGen/AArch64/GlobalISel/select-ctlz.mir