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from 07c1e2bdfa5 [CostModel] Model all `extractvalue`s as free. new 817cb7ab7f0 [InstCombine] Fold '(-1 u/ %x) u< %y' to '@llvm.umul.with.o [...] new 1bb1b5ebe5f [InstCombine] Fold '((%x * %y) u/ %x) != %y' to '@llvm.umul [...] new 789eb37a624 [SimplifyCFG] FoldTwoEntryPHINode(): don't bailout on i1 PH [...] new ee2422df6a0 [InstSimplify] Drop leftover "division-by-zero guard" aroun [...] new f7bbb0f6695 [InstSimplify] Drop leftover "division-by-zero guard" aroun [...]

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Summary of changes: lib/Analysis/InstructionSimplify.cpp | 87 +++++++++++++++ lib/Transforms/InstCombine/InstCombineCompares.cpp | 70 ++++++++++++ lib/Transforms/InstCombine/InstCombineInternal.h | 2 + lib/Transforms/Utils/SimplifyCFG.cpp | 18 +++- ...gned-mul-lack-of-overflow-check-via-mul-udiv.ll | 51 ++++----- ...l-lack-of-overflow-check-via-udiv-of-allones.ll | 28 ++--- .../unsigned-mul-overflow-check-via-mul-udiv.ll | 45 ++++---- ...igned-mul-overflow-check-via-udiv-of-allones.ll | 24 ++--- .../div-by-0-guard-before-smul_ov-not.ll | 12 +-- .../InstSimplify/div-by-0-guard-before-smul_ov.ll | 12 +-- .../div-by-0-guard-before-umul_ov-not.ll | 12 +-- .../InstSimplify/div-by-0-guard-before-umul_ov.ll | 12 +-- .../unsigned-multiply-overflow-check.ll | 117 +++++++++++++++++---- .../unsigned-multiplication-will-overflow.ll | 6 +- 14 files changed, 360 insertions(+), 136 deletions(-)