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(parent: 2ed7464) | patch
Teach instcombine to preserve the nsw bit by doing an after-the-fact analysis
authorNick Lewycky <nicholas@mxc.ca>
Sun, 14 Aug 2011 01:45:19 +0000 (01:45 +0000)
committerNick Lewycky <nicholas@mxc.ca>
Sun, 14 Aug 2011 01:45:19 +0000 (01:45 +0000)
commitdaf27ea899fbd94a020cc6f4680279ea0ac65064
treedf4e6aeb92f75c1fa736f93ac547d6b8dbb6bbeftree | snapshot
parent2ed7464c09d04d9a35f50f0981482878edc0065fcommit | diff
Teach instcombine to preserve the nsw bit by doing an after-the-fact analysis
when combining add and sub instructions. Patch by Pranav Bhandarkar!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137570 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/InstCombine/InstructionCombining.cpp diff | blob | history
test/Transforms/InstCombine/nsw.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors