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from c4f04d9 swifterror: Don't compute swifterror vregs during instruction [...] new 71c3126 Codegen: Tail-duplicate during placement.

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Summary of changes: include/llvm/Analysis/LoopInfoImpl.h | 9 +- include/llvm/CodeGen/TailDuplicator.h | 26 +- lib/CodeGen/MachineBlockPlacement.cpp | 306 ++++++++++++++++++++-- lib/CodeGen/TailDuplication.cpp | 2 +- lib/CodeGen/TailDuplicator.cpp | 59 ++++- test/CodeGen/AArch64/arm64-extload-knownzero.ll | 1 - test/CodeGen/AArch64/machine_cse.ll | 6 +- test/CodeGen/AArch64/tail-dup-repeat-worklist.ll | 69 +++++ test/CodeGen/ARM/2011-03-23-PeepholeBug.ll | 1 - test/CodeGen/PowerPC/branch-opt.ll | 16 +- test/CodeGen/PowerPC/sjlj.ll | 18 +- test/CodeGen/PowerPC/tail-dup-layout.ll | 100 +++++++ test/CodeGen/WebAssembly/cfg-stackify.ll | 2 +- test/CodeGen/WebAssembly/mem-intrinsics.ll | 2 +- test/CodeGen/X86/block-placement.ll | 10 +- test/CodeGen/X86/cmov-into-branch.ll | 4 +- test/CodeGen/X86/fma-intrinsics-phi-213-to-231.ll | 24 +- test/CodeGen/X86/fp-une-cmp.ll | 4 +- test/CodeGen/X86/pr11202.ll | 5 +- test/CodeGen/X86/ragreedy-bug.ll | 22 +- test/CodeGen/X86/sse1.ll | 28 +- test/CodeGen/X86/tail-dup-merge-loop-headers.ll | 190 ++++++++++++++ test/CodeGen/X86/tail-dup-repeat.ll | 53 ++++ test/CodeGen/X86/update-terminator.mir | 22 ++ 24 files changed, 884 insertions(+), 95 deletions(-) create mode 100644 test/CodeGen/AArch64/tail-dup-repeat-worklist.ll create mode 100644 test/CodeGen/PowerPC/tail-dup-layout.ll create mode 100644 test/CodeGen/X86/tail-dup-merge-loop-headers.ll create mode 100644 test/CodeGen/X86/tail-dup-repeat.ll