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2008-03-29make the common case of a single store (which clearly shouldn't be turnedChris Lattner
into a memset!) faster by avoiding an allocation of an std::list node. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48939 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-29give form-memset a significantly more sane heuristic, enable it by default.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48937 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-28make memset inference significantly more powerful: it can now handle Chris Lattner
memsets that initialize "structs of arrays" and other store sequences that are not sequential. This is still only enabled if you pass -form-memset-from-stores. The flag is not heavily tested and I haven't analyzed the perf regressions when -form-memset-from-stores is passed either, but this causes no make check regressions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48909 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-27PHI->removeIncomingValue may remove PHInode.Devang Patel
Increment iterator in advance. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48890 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-25Handle a special case xor undef, undef -> 0. Technically this should be ↵Evan Cheng
transformed to undef. But this is such a common idiom (misuse) we are going to handle it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48791 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24Add incoming value from header only if phi node has any use inside the loop.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48738 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24Temporarily disabling memset forming optimization. Add an option.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48720 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-24Transform (zext (or (icmp), (icmp))) to (or (zext (cimp), (zext icmp))) if ↵Evan Cheng
at least one of the (zext icmp) can be transformed to eliminate an icmp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48715 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-22implement an initial hack at a straight-line store -> memset optimization.Chris Lattner
This fires dozens of times across spec and multisource, but I don't know if it actually speeds stuff up. Hopefully the testers will show something nice :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48680 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-22implement the logic for memset insertion and store deletion.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48679 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-22This is a partially implemented and currently disabled start of a storeChris Lattner
merging optimization. Nothing to see here, hopefully more later :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48670 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Don't include <map> in Pass.h, which doesn't need it. This requiresDan Gohman
adding <map> to many files that actually do need it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48667 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21the size of a smallvector shouldn't be part of the interface to these methods.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48662 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21make gvn marginally faster by reallocating the lastSeenLoad map forChris Lattner
each basic block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48660 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Minor cleanups and shrinkification.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48658 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Handle getresult instructions in different basic blocksDan Gohman
from their aggregate operands by moving the getresult instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48657 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Fix the build for gcc-4.2.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48639 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-21Teach masked value is zero about add and sub, and use MVIZ toChris Lattner
simplify things like (X & 4) >> 1 == 2 --> (X & 4) == 4. since it is obvious that the shift doesn't remove any bits. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48631 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-20C and Objective Caml bindings for mem2reg and reg2mem.Gordon Henriksen
Patch by Erick Tryzelaar. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48602 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19Add comment.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48567 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19Remove dead options.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48556 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-17Update heuritics that estimates cost of call instructions.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48474 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-16C and Objective Caml bindings for several scalar transforms.Gordon Henriksen
Patch originally by Erick Tryzelaar, but has been modified somewhat. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48419 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-14The inst combining of inttoptr into GEP with one index was using the bit size ofBill Wendling
the type instead of the byte size. This was causing troublesome mis-compilations. True to form, this took 2 days to find and is a one-line fix. :-P git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48354 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-13Fix a bug in GVN that Duncan noticed, where we potentially need to insert a Owen Anderson
pointer bitcast when performing return slot optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48343 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-12Reimplement the parameter attributes support, phase #1. hilights:Chris Lattner
1. There is now a "PAListPtr" class, which is a smart pointer around the underlying uniqued parameter attribute list object, and manages its refcount. It is now impossible to mess up the refcount. 2. PAListPtr is now the main interface to the underlying object, and the underlying object is now completely opaque. 3. Implementation details like SmallVector and FoldingSet are now no longer part of the interface. 4. You can create a PAListPtr with an arbitrary sequence of ParamAttrsWithIndex's, no need to make a SmallVector of a specific size (you can just use an array or scalar or vector if you wish). 5. All the client code that had to check for a null pointer before dereferencing the pointer is simplified to just access the PAListPtr directly. 6. The interfaces for adding attrs to a list and removing them is a bit simpler. Phase #2 will rename some stuff (e.g. PAListPtr) and do other less invasive changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48289 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-12Improve the return slot optimization to be both more aggressive (not limited ↵Owen Anderson
to sret parameters), and safer (when the passed pointer might be invalid). Thanks to Duncan and Chris for the idea behind this, and extra thanks to Duncan for helping me work out the trap-safety. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48280 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11Skip functions that return multiple values.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48233 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11Become multiple return value aware.Devang Patel
Right now, the pass does not optimize tail recursions involving multiple return values. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48228 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11Add TODO reminder.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48227 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-11Initial multiple return values support.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48210 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09SCCP also needs to be taught to follow unwind_toNick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48109 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09Don't eliminate blocks that are only reachable by unwind_to.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48106 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-09Update the block cloner which fixes bugpoint on code using unwind_to (phew!)Nick Lewycky
and also update the cloning interface's major user, the loop optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48088 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-08Not all users of a BB are Instructions any more.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48047 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-06Don't try to simplify urem and srem using arithmetic rules that don't workNick Lewycky
under modulo (overflow). Fixes PR1933. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47987 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29fix a bug Anders ran into where scalarrepl would crash when promotingChris Lattner
a union containing a vector and an array whose elements were smaller than the vector elements. this means we need to compile the load of the array elements into an extract element plus a truncate. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47752 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29Refactor some code out of ConvertUsesToScalar into their own methods, noChris Lattner
functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47751 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-29Folding or(fcmp,fcmp) only works if the operands of the fcmps are the same ↵Chris Lattner
fp type. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47750 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26Fix an issue where GVN had the sizes of the two memcpy's reverse, resultingOwen Anderson
in an invalid transformation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47639 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26fix http://llvm.org/bugs/show_bug.cgi?id=2097Gabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47615 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26Fix for pr2093: direct operands aren't necessarily addresses, so don't Eli Friedman
try to simplify them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47610 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26De-tabify.Bill Wendling
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47599 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-26Fix PR2076. CodeGenPrepare now sinks address computation for inline asm memoryEvan Cheng
operands into inline asm block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47589 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-25Fix an issue where GVN was performing the return slot optimization when it wasOwen Anderson
not safe. This is fixed by more aggressively checking that the return slot is not used elsewhere in the function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47544 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-25Fix an issue where GVN would try to use an instruction before its definition ↵Owen Anderson
when performing return slot optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47541 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-22Split ParameterAttributes.h, putting the complicatedDale Johannesen
stuff into ParamAttrsList.h. Per feedback from ParamAttrs changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47504 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-22Fixed a typo.Zhou Sheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47478 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20Add explicit keywords.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47382 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-20Fix newly-introduced 4.3 warningsAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47375 91177308-0d34-0410-b5e6-96231b3b80d8
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