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2011-02-07implement .ll and .bc support for nsw/nuw on shl and exact on lshr/ashr.Chris Lattner
Factor some code better. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125006 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-06enhance vmcore to know that udiv's can be exact, and add a trivialChris Lattner
instcombine xform to exercise this. Nothing forms exact udivs yet though. This is progress on PR8862 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-07Reappy r80998, now that the GlobalOpt bug that it exposed on MiniSAT is fixed.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81172 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-06Revert "Include optional subclass flags, such as inbounds, nsw, etc., ...", thisDaniel Dunbar
breaks MiniSAT on x86_64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81098 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-04Include optional subclass flags, such as inbounds, nsw, etc., in theDan Gohman
Constant uniquing tables. This allows distinct ConstantExpr objects with the same operation and different flags. Even though a ConstantExpr "a + b" is either always overflowing or never overflowing (due to being a ConstantExpr), it's still necessary to be able to represent it both with and without overflow flags at the same time within the IR, because the safety of the flag may depend on the context of the use. If the constant really does overflow, it wouldn't ever be safe to use with the flag set, however the use may be in code that is never actually executed. This also makes it possible to merge all the flags tests into a single test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80998 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27Add a new keyword 'inbounds' for use with getelementptr. See theDan Gohman
LangRef.html changes for details. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77259 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-27Change the assembly syntax for nsw, nuw, and exact, putting themDan Gohman
after their associated opcodes rather than before. This makes them a little easier to read. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77194 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-22Rename the new unsigned and signed keywords to nuw and nsw,Dan Gohman
which stand for no-unsigned-wrap and no-signed-wrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-20Assembly and Bitcode support for unsigned/signed overflow flags andDan Gohman
exact sdiv flags. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76475 91177308-0d34-0410-b5e6-96231b3b80d8