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2009-10-23Remove AllocationInst. Since MallocInst went away, AllocaInst is the only ↵Victor Hernandez
subclass of AllocationInst, so it no longer is necessary. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84969 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-23Make LoopDeletion check the maximum backedge taken count, rather than theDan Gohman
exact backedge taken count, when checking for infinite loops. This allows it to delete loops with multiple exit conditions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84952 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-22move another load optimization from instcombine -> libanalysis.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84841 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-22move 'loading i32 from string' optimization from instcombineChris Lattner
to libanalysis. Instcombine shrinking... does this even make sense??? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84840 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-22Move some constant folding logic for loads out of instcombine intoChris Lattner
Analysis/ConstantFolding.cpp. This doesn't change the behavior of instcombine but makes other clients of ConstantFoldInstruction able to handle loads. This was partially extracted from Eli's patch in PR3152. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84836 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-22fix PR5262.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21Derive metadata hierarchy from Value instead of User.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84801 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21revert r84754, it isn't the right approach. Edwin, please propose Chris Lattner
patches for fixes like this instead of committing them directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84799 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21Make changes to rev 84292 as requested by Chris Lattner.Victor Hernandez
Most changes are cleanup, but there is 1 correctness fix: I fixed InstCombine so that the icmp is removed only if the malloc call is removed (which requires explicit removal because the Worklist won't DCE any calls since they can have side-effects). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84772 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21Fix PR5262: when folding select into PHI, make sure all operands are availableTorok Edwin
in the PHI's Basic Block. This uses a conservative approach, because we don't have dominator info in instcombine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84754 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21make GVN work better when TD is not around:Chris Lattner
"In the existing code, if the load and the value to replace it with are of different types *and* target data is available, it tries to use the target data to coerce the replacement value to the type of the load. Otherwise, it skips all effort to handle the type mismatch and just feeds the wrongly-typed replacement value to replaceAllUsesWith, which triggers an assertion. The patch replaces it with an outer if checking for type mismatch, and an inner if-else that checks whether target data is available and, if not, returns false rather than trying to replace the load." Patch by Kenneth Uildriks! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84739 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-21Do not remove dead metadata for now.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84731 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-20alternate fix for PR5258 which avoids worklist problems, with reduced testcase.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84667 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-20Restore LoopUnswitch's block-oriented threshold. LoopUnswitch now checks bothDan Gohman
the estimated code size and the number of blocks when deciding whether to do a non-trivial unswitch. This protects it from some very undesirable worst-case behavior on large numbers of loop-unswitchable conditions, such as in the testcase in PR5259. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84661 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-20Fix PR5258, jump-threading creating invalid PHIs.Torok Edwin
When an incoming value for a PHI is updated, we must also updated all other incoming values for the same BB to match, otherwise we create invalid PHIs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84638 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-20Fix PR4313: IPSCCP was not setting the lattice value for the invoke instructionTorok Edwin
when the invoke had multiple return values: it set the lattice value only on the extractvalue. This caused the invoke's lattice value to remain the default (undefined), and later propagated to extractvalue's operand, which incorrectly introduces undefined behavior. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84637 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-19Refactor lookup_or_add to contain _MUCH_ less duplicated code. Add support forOwen Anderson
numbering first class aggregate instructions while we're at it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84547 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-19Malloc calls are marked NoAlias, so the code below the isMalloc() check ↵Victor Hernandez
makes it redundant. Removing the isMalloc() check. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84541 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-19Simplify some code.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84533 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-19Fix SplitBlockPredecessors' LoopInfo updating code to handle the caseDan Gohman
where a loop's header is being split and it has predecessors which are not contained by the most-nested loop which contains the loop. This fixes PR5235. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84505 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-19Change instnamer to name arguments "arg" instead of "tmp" for clarity, andDan Gohman
to name basic blocks "bb" instead of "BB", for consistency. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84502 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-18remove the IndMemRemPass, which only made sense for when malloc/free were ↵Chris Lattner
intrinsic instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84404 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17Use raw_ostream::write_escaped instead of EscapeString.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84356 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17Simplify some code (first hunk) and fix PR5208 (second hunk) byChris Lattner
updating the callgraph when introducing a call. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84310 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17Remove MallocInst from LLVM Instructions.Victor Hernandez
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84299 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-17Autoupgrade malloc insts to malloc calls.Victor Hernandez
Update testcases that rely on malloc insts being present. Also prematurely remove MallocInst handling from IndMemRemoval and RaiseAllocations to help pass tests in this incremental step. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84292 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-16HeapAllocSRoA also needs to check if malloc array size can be computed.Victor Hernandez
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84288 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-16Move zext and sext casts fed by loads into the same block as theDan Gohman
load, to help SelectionDAG fold them into the loads, unless conditions are unfavorable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84271 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-16Strip trailing white space.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84256 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-15Fix bug where array malloc with unexpected computation of the size argument ↵Victor Hernandez
resulted in MallocHelper identifying the malloc as a non-array malloc. This broke GlobalOpt's optimization of stores of mallocs to global variables. The fix is to classify malloc's into 3 categories: 1. non-array mallocs 2. array mallocs whose array size can be determined 3. mallocs that cannot be determined to be of type 1 or 2 and cannot be optimized getMallocArraySize() returns NULL for category 3, and all users of this function must avoid their malloc optimization if this function returns NULL. Eventually, currently unexpected codegen for computing the malloc's size argument will be supported in isArrayMalloc() and getMallocArraySize(), extending malloc optimizations to those examples. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84199 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-15only try to fold constantexpr operands when the worklist is first populated, Chris Lattner
don't bother every time going around the main worklist. This speeds up a release-asserts opt -std-compile-opts on 403.gcc by about 4% (1.5s). It seems to speed up the most expensive instances of instcombine by ~10%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-15don't bother calling ConstantFoldInstruction unless there is a use of theChris Lattner
instruction (which disqualifies stores, unreachable, etc) and at least the first operand is a constant. This filters out a lot of obvious cases that can't be folded. Also, switch the IRBuilder to a TargetFolder, which tries harder. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84170 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-14Use isVoidTy()Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84118 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-14make instcombine's instruction sinking more aggressive in theChris Lattner
presence of PHI nodes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84103 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Check void type before using RAUWd.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84049 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Do not check use_empty() before replaceAllUsesWith(). This gives ↵Devang Patel
ValueHandles a chance to get properly updated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84033 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Use the new CodeMetrics class to compute code size instead ofDan Gohman
manually counting instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84016 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Update CMake file.Ted Kremenek
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84001 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Commit the removal of this file, which is now moved to lib/Analysis.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83999 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Move the InlineCost code from Transforms/Utils to Analysis.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83998 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Start refactoring the inline cost estimation code so that it can be usedDan Gohman
for purposes other than inlining. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83997 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13change simplifycfg to not duplicate 'unwind' instructions. HopefullyChris Lattner
this will increase the likelihood of common code getting sunk towards the unwind. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83996 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-13Make LoopUnswitch's cost estimation count Instructions, rather thanDan Gohman
BasicBlocks, so that it doesn't blindly procede in the presence of large individual BasicBlocks. This addresses a class of code-size expansion problems. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83992 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-12Make licm debug message readable.Evan Cheng
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83908 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-12Fix warning.Dale Johannesen
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83870 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-12populate instcombine's initial worklist more carefully, causingChris Lattner
it to visit instructions from the start of the function to the end of the function in the first path. This greatly speeds up some pathological cases (e.g. PR5150). Try #3, this time with some unneeded debug info stuff removed which was causing dead pointers to be added to the worklist. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83818 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-11revert r83814 for now, it is making the llvm-gcc bootstrap unhappy.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83817 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-11populate instcombine's initial worklist more carefully, causingChris Lattner
it to visit instructions from the start of the function to the end of the function in the first path. This greatly speeds up some pathological cases (e.g. PR5150). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83814 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-11remove some harmful code that would turn an insertelement on an undefChris Lattner
into a shuffle even if it was used by another insertelement. If the visitation order of instcombine was wrong, this would turn a chain of insertelements into a chain of shufflevectors, which was quite painful. Since CollectShuffleElements handles these cases, the code can just be nuked. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83810 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-11teach instcombine to simplify xor's harder, catching theChris Lattner
new testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83799 91177308-0d34-0410-b5e6-96231b3b80d8
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