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2011-03-07Add more analysis of the sign bit of an srem instruction. If the LHS is negativeNick Lewycky
then the result could go either way. If it's provably positive then so is the srem. Fixes PR9343 #7! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127146 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-05Thread comparisons over udiv/sdiv/ashr/lshr exact and lshr nuw/nsw wheneverNick Lewycky
possible. This goes into instcombine and instsimplify because instsimplify doesn't need to check hasOneUse since it returns (almost exclusively) constants. This fixes PR9343 #4 #5 and #8! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127064 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04When decling to reuse existing expressions that involve casts, ignoreDan Gohman
bitcasts, which are really no-ops here. This fixes slowdowns on MultiSource/Applications/aha and others. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127031 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04Revert broken srem logic from r126991.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127021 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04Fold "icmp pred (srem X, Y), Y" like we do for urem. Handle signed comparisonsNick Lewycky
in the urem case, though not the other way around. This is enough to get #3 from PR9343! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126991 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04Teach instruction simplify to use constant ranges to solve problems of the formNick Lewycky
"icmp pred %X, CI" and a number of examples where "%X = binop %Y, CI2". Some of these cases (div and rem) used to make it through opt -O2, but the others are probably now making code elsewhere redundant (probably instcombine). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126988 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-02Remove DIFactory. Patch by Devang.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126871 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-02Don't re-use existing addrec expansions if they contain casts.Dan Gohman
This fixes PR9259. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126812 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Today, the language front ends produces llvm.dbg.* intrinsics, used to ↵Devang Patel
encode arguments' debug info, in order any way, most of the times. However, if a front end mix-n-matches llvm.dbg.declare and llvm.dbg.value intrinsics to encode debug info for arguments then code generator needs a way to find argument order. Use 8 bits from line number field to keep track of argument ordering while encoding debug info for an argument. That leaves 24 bit for line no, DebugLoc also allocates 24 bit for line numbers. If a function has more than 255 arguments then rest of the arguments will be ordered by llvm.dbg.* intrinsics' ordering in IR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126793 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Optimize "icmp pred (urem X, Y), Y" --> true/false depending on pred. There'sNick Lewycky
more work to do here, "icmp ult (urem X, 10), 11" doesn't optimize away yet. Fixes example 3 from PR9343! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126741 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-01Unbreak CMake build.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126717 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28Delete the LiveValues pass. I won't get get back to the project itDan Gohman
was started for in the foreseeable future. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126668 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28Fix comment.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126645 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28srem doesn't actually have the same resulting sign as its numerator, you couldNick Lewycky
also have a zero when numerator = denominator. Reverts parts of r126635 and r126637. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126644 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28Teach value tracking to make use of flags in more situations.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126642 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-28Teach ValueTracking to look at the dividend when determining the sign bit of anNick Lewycky
srem instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126637 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-27RegionPrinter: Ignore back edges when layouting the graphTobias Grosser
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126564 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-22Follow LLVM coding style. Devang Patel
clang uses DBuilder, so it requries corresponding change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126231 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-20Move "A | ~(A & ?) -> -1" from InstCombine to InstructionSimplify.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126082 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19Stores of null pointers should turn into memset, we weren't recognizingChris Lattner
them as splat values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126041 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18Move library stuff out of the toplevel CMakeLists.txt file.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125968 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-15Move DbgInfoPrinter specific utlities inside DbgInfoPrinter.cppDevang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125571 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-15Print function info. Patch by Minjang Kim.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125567 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-15convert ConstantVector::get to use ArrayRef.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125537 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-14revert my ConstantVector patch, it seems to have made the llvm-gccChris Lattner
builders unhappy. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125504 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-14Switch ConstantVector::get to use ArrayRef instead of a pointer+sizeChris Lattner
idiom. Change various clients to simplify their code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125487 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-13Remove pointless blank line.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125463 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-13Teach instsimplify that X+Y>=X+Z is the same as Y>=Z if neither side overflows,Duncan Sands
plus some variations of this. According to my auto-simplifier this occurs a lot but usually in combination with max/min idioms. Because max/min aren't handled yet this unfortunately doesn't have much effect in the testsuite. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125462 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-13teach SCEV that the scale and addition of an inbounds gep don't NSW.Chris Lattner
This fixes a FIXME in scev-aa.ll (allowing a new no-alias result) and generally makes things more precise. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125449 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-11Per discussion with Dan G, inbounds geps *certainly* can haveChris Lattner
unsigned overflow (e.g. "gep P, -1"), and while they can have signed wrap in theoretical situations, modelling an AddRec as not having signed wrap is going enough for any case we can think of today. In the future if this isn't enough, we can revisit this. Modeling them as having NUW isn't causing any known problems either FWIW. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125410 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-10Tolerate degenerate phi nodes that can occur in the middle of optimizationNick Lewycky
passes. Fixes PR9112. Patch by Jakub Staszak! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125319 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-09Formatting and comment tweaks.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125200 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-09Teach instsimplify some tricks about exact/nuw/nsw shifts.Chris Lattner
improve interfaces to instsimplify to take this info. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125196 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-09Rework InstrTypes.h so to reduce the repetition around the NSW/NUW/ExactChris Lattner
versions of creation functions. Eventually, the "insertion point" versions of these should just be removed, we do have IRBuilder afterall. Do a massive rewrite of much of pattern match. It is now shorter and less redundant and has several other widgets I will be using in other patches. Among other changes, m_Div is renamed to m_IDiv (since it only matches integer divides) and m_Shift is gone (it used to match all binops!!) and we now have m_LogicalShift for the one client to use. Enhance IRBuilder to have "isExact" arguments to things like CreateUDiv and reduce redundancy within IRbuilder by having these methods chain to each other more instead of duplicating code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125194 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-07Add an m_Div pattern for matching either a udiv or an sdiv and use itDuncan Sands
to simplify the "(X/Y)*Y->X when the division is exact" transform. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125004 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-06teach instsimplify to transform (X / Y) * Y to XChris Lattner
when the div is an exact udiv. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124994 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-06Remove premature optimization that avoided calculating argument weightsEric Christopher
if we weren't going to inline the function. The rest of the code using this was removed. Fixes PR9154. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124991 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-06Simplify test, as suggested by Chris.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124990 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-06When loading from a constant, fold inttoptr if the integer type and the ↵Anders Carlsson
resulting pointer type both have the same size. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124987 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-05Fix another warning.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124961 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-05Fix cut and paste error spotted by Jakob.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124930 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-05Rewrite how the indirect call bonus is handled. This now works by:Eric Christopher
a) Making it a per call site bonus for functions that we can move from indirect to direct calls. b) Reduces the bonus from 500 to 100 per call site. c) Subtracts the size of the possible newly inlineable call from the bonus to only add a bonus if we can inline a small function to devirtualize it. Also changes the bonus from a positive that's subtracted to a negative that's added. Fixes the remainder of rdar://8546196 by reducing the object file size after inlining by 84%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124916 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-03Improve threading of comparisons over select instructions (spotted by myDuncan Sands
auto-simplifier). This has a big impact on Ada code, but not much else. Unfortunately the impact is mostly negative! This is due to PR9004 (aka SCCP failing to resolve conditional branch conditions in the destination blocks of the branch), in which simple correlated expressions are not resolved but complicated ones are, so simplifying has a bad effect! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124788 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-03Fix typo in comment.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124759 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-02Add support to describe template value parameter in debug info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124755 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-02Add support to describe template parameter type in debug info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124752 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-02Reenable the transform "(X*Y)/Y->X" when the multiplication is known not toDuncan Sands
overflow (nsw flag), which was disabled because it breaks 254.gap. I have informed the GAP authors of the mistake in their code, and arranged for the testsuite to use -fwrapv when compiling this benchmark. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124746 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-01Add a m_Undef pattern for convenience. This is so that code that usesDuncan Sands
pattern matching can also pattern match undef, creating a more uniform style. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124657 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-01Add a m_SignBit pattern for convenience.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124656 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-01Have m_One also match constant vectors for which every element is 1.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124655 91177308-0d34-0410-b5e6-96231b3b80d8
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