[PATCH] D72048: [InstCombine] Preserve nuw on sub of geps (PR44419)
Nikita Popov via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Jan 1 02:23:14 PST 2020
nikic created this revision.
nikic added reviewers: spatel, lebedev.ri, RKSimon.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
Fix https://bugs.llvm.org/show_bug.cgi?id=44419 by preserving the nuw on sub of geps. We only do this for the simple case where we have one non-swapped gep. We could also preserve some information for the two gep case, but this would be more complicated.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D72048
Files:
llvm/include/llvm/Analysis/Utils/Local.h
llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
llvm/lib/Transforms/InstCombine/InstCombineInternal.h
llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
llvm/test/Transforms/InstCombine/sub-gep.ll
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