[Tcwg-commits] [llvm] branch master updated (c539eea7c6d -> ac12e1602f7)

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from c539eea7c6d Restrict the definition of loop preheader to avoid EH blocks new ac12e1602f7 [x86] add/sub (X==0) --> sbb(cmp X, 1)

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Summary of changes: lib/Target/X86/X86ISelLowering.cpp | 22 +++++++++++++++++----- test/CodeGen/X86/sbb.ll | 9 +++------ 2 files changed, 20 insertions(+), 11 deletions(-)