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* Pull these back out, they're a little too aggressive and timeEric Christopher2010-02-091-6/+0
| | | | | | | consuming for a simple optimization. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95671 91177308-0d34-0410-b5e6-96231b3b80d8
* Add a new pass to do llvm.objsize lowering using SCEV.Eric Christopher2010-02-091-0/+6
| | | | | | | | | | | | | Initial skeleton and SCEVUnknown lowering implemented, the rest should come relatively quickly. Move testcase to new directory. Move pass to right before SimplifyLibCalls - which is moved down a bit so we can take advantage of a few opts. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95628 91177308-0d34-0410-b5e6-96231b3b80d8
* Reintroduce the InlineHint function attribute.Jakob Stoklund Olesen2010-02-061-3/+4
| | | | | | | | | | | | This time it's for real! I am going to hook this up in the frontends as well. The inliner has some experimental heuristics for dealing with the inline hint. When given a -respect-inlinehint option, functions marked with the inline keyword are given a threshold just above the default for -O3. We need some experiments to determine if that is the right thing to do. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95466 91177308-0d34-0410-b5e6-96231b3b80d8
* Teach SimplifyCFG about magic pointer constants.Jakob Stoklund Olesen2010-02-051-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Weird code sometimes uses pointer constants other than null. This patch teaches SimplifyCFG to build switch instructions in those cases. Code like this: void f(const char *x) { if (!x) puts("null"); else if ((uintptr_t)x == 1) puts("one"); else if (x == (char*)2 || x == (char*)3) puts("two"); else if ((intptr_t)x == 4) puts("four"); else puts(x); } Now becomes a switch: define void @f(i8* %x) nounwind ssp { entry: %magicptr23 = ptrtoint i8* %x to i64 ; <i64> [#uses=1] switch i64 %magicptr23, label %if.else16 [ i64 0, label %if.then i64 1, label %if.then2 i64 2, label %if.then9 i64 3, label %if.then9 i64 4, label %if.then14 ] Note that LLVM's own DenseMap uses magic pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95439 91177308-0d34-0410-b5e6-96231b3b80d8
* Check alignment of loads when deciding whether it is safe to execute themBob Wilson2010-01-301-1/+1
| | | | | | | | unconditionally. Besides checking the offset, also check that the underlying object is aligned as much as the load itself. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94875 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve isSafeToLoadUnconditionally to recognize that GEPs with constantBob Wilson2010-01-291-1/+2
| | | | | | | | indices are safe if the result is known to be within the bounds of the underlying object. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94829 91177308-0d34-0410-b5e6-96231b3b80d8
* Don't bother with sprintf, just pass the Twine through.Benjamin Kramer2010-01-271-1/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94684 91177308-0d34-0410-b5e6-96231b3b80d8
* DbgInfoIntrinsics no longer appear in an instruction's use list; so clean up ↵Victor Hernandez2010-01-211-7/+0
| | | | | | looking for them in use iterations and remove OnlyUsedByDbgInfoIntrinsics() git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94111 91177308-0d34-0410-b5e6-96231b3b80d8
* Move per-function inline threshold calculation to a method.Jakob Stoklund Olesen2010-01-201-0/+6
| | | | | | | No functional change except the forgotten test for InlineLimit.getNumOccurrences() == 0 in the CurrentThreshold2 calculation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94007 91177308-0d34-0410-b5e6-96231b3b80d8
* add a helper function.Chris Lattner2010-01-121-0/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93251 91177308-0d34-0410-b5e6-96231b3b80d8
* Make RecursivelyDeleteTriviallyDeadInstructions,Dan Gohman2010-01-052-6/+8
| | | | | | | | RecursivelyDeleteDeadPHINode, and DeleteDeadPHIs return a flag indicating whether they made any changes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92732 91177308-0d34-0410-b5e6-96231b3b80d8
* convert various IntrinsicInst's to use class instead of struct.Chris Lattner2010-01-051-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92681 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove dead debug info intrinsics.Devang Patel2010-01-051-5/+0
| | | | | | | | | | | | Intrinsic::dbg_stoppoint Intrinsic::dbg_region_start Intrinsic::dbg_region_end Intrinsic::dbg_func_start AutoUpgrade simply ignores these intrinsics now. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92557 91177308-0d34-0410-b5e6-96231b3b80d8
* remove the random sampling framework, which is not maintained anymore.Chris Lattner2010-01-021-10/+0
| | | | | | | If there is interest, it can be resurrected from SVN. PR4912. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92422 91177308-0d34-0410-b5e6-96231b3b80d8
* comment fix: weakvh -> tracking vhChris Lattner2009-12-221-2/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91867 91177308-0d34-0410-b5e6-96231b3b80d8
* Eliminate unnecessary LLVMContexts.Dan Gohman2009-12-182-2/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91729 91177308-0d34-0410-b5e6-96231b3b80d8
* Pull LLVMContext out of PromoteMemToReg.Nick Lewycky2009-11-231-2/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89645 91177308-0d34-0410-b5e6-96231b3b80d8
* Make EliminateDuplicatePHINodes() available as a utility functionJim Grosbach2009-11-191-1/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89297 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an option for running GVN with redundant load processing disabled.Dan Gohman2009-11-141-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@88742 91177308-0d34-0410-b5e6-96231b3b80d8
* remove the now dead condprop pass, PR3906.Chris Lattner2009-11-111-8/+0
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86810 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement support to debug inlined functions.Devang Patel2009-11-101-1/+3
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86748 91177308-0d34-0410-b5e6-96231b3b80d8
* move some generally useful functions out of jump threadingChris Lattner2009-11-101-0/+15
| | | | | | | into libanalysis and transformutils. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86735 91177308-0d34-0410-b5e6-96231b3b80d8
* refactor TryToSimplifyUncondBranchFromEmptyBlock out of SimplifyCFG.Chris Lattner2009-11-101-1/+8
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86666 91177308-0d34-0410-b5e6-96231b3b80d8
* Make a few more LLVM headers parsable as standalone headers.Douglas Gregor2009-11-052-0/+5
| | | | | | | | | Fix some problems with the hidden copy constructors for ImmutableMap/ImmutableSet found by Clang++. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86186 91177308-0d34-0410-b5e6-96231b3b80d8
* Improve the other instance of the comment.Duncan Sands2009-11-011-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85733 91177308-0d34-0410-b5e6-96231b3b80d8
* update the comment above llvm::SplitCriticalEdge, and makeChris Lattner2009-10-311-3/+9
| | | | | | | it abort on IndirectBrInst as describe in the comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85688 91177308-0d34-0410-b5e6-96231b3b80d8
* Revert r85667. LoopUnroll currently can't call utility functions whichDan Gohman2009-10-311-5/+3
| | | | | | | | auto-update the DominatorTree because it doesn't keep the DominatorTree current while it works. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85670 91177308-0d34-0410-b5e6-96231b3b80d8
* Merge the enhancements from LoopUnroll's FoldBlockIntoPredecessor intoDan Gohman2009-10-311-3/+5
| | | | | | | | MergeBlockIntoPredecessor. This makes SimplifyCFG slightly more aggressive, and makes it unnecessary for LoopUnroll to have its own copy of this code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85667 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove CodeGenLICM. It's largely obsoleted by MachineLICM's new abilityDan Gohman2009-10-311-6/+0
| | | | | | | to unfold loop-invariant loads. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85657 91177308-0d34-0410-b5e6-96231b3b80d8
* Add option to createGVNPass to disable PRE.Evan Cheng2009-10-301-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85609 91177308-0d34-0410-b5e6-96231b3b80d8
* Add ABCD, a generalized implementation of the Elimination of Array BoundsNick Lewycky2009-10-281-0/+6
| | | | | | | | | Checks on Demand algorithm which looks at arbitrary branches instead of loop iterations. This is GSoC work by Andre Tavares with only editorial changes applied! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85382 91177308-0d34-0410-b5e6-96231b3b80d8
* Forgot to commit these.Owen Anderson2009-10-261-0/+6
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85180 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove FreeInst.Victor Hernandez2009-10-261-9/+0
| | | | | | | | | Remove LowerAllocations pass. Update some more passes to treate free calls just like they were treating FreeInst. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85176 91177308-0d34-0410-b5e6-96231b3b80d8
* Check in the experimental GEP splitter pass. This pass splits complexDan Gohman2009-10-261-0/+6
| | | | | | | | | | | GEPs (more than one non-zero index) into simple GEPs (at most one non-zero index). In some simple experiments using this it's not uncommon to see 3% overall code size wins, because it exposes redundancies that can be eliminated, however it's tricky to use because instcombine aggressively undoes the work that this pass does. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85144 91177308-0d34-0410-b5e6-96231b3b80d8
* MapValue doesn't needs its LLVMContext argument.Dan Gohman2009-10-241-2/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85020 91177308-0d34-0410-b5e6-96231b3b80d8
* Add an explicit keyword.Dan Gohman2009-10-241-1/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85009 91177308-0d34-0410-b5e6-96231b3b80d8
* Auto-upgrade free instructions to calls to the builtin free function.Victor Hernandez2009-10-241-7/+0
| | | | | | | | | Update all analysis passes and transforms to treat free calls just like FreeInst. Remove RaiseAllocations and all its tests since FreeInst no longer needs to be raised. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84987 91177308-0d34-0410-b5e6-96231b3b80d8
* remove the IndMemRemPass, which only made sense for when malloc/free were ↵Chris Lattner2009-10-181-4/+0
| | | | | | | | | intrinsic instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84404 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove MallocInst from LLVM Instructions.Victor Hernandez2009-10-171-3/+2
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84299 91177308-0d34-0410-b5e6-96231b3b80d8
* Strip trailing white space.Duncan Sands2009-10-161-10/+10
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84256 91177308-0d34-0410-b5e6-96231b3b80d8
* Move the InlineCost code from Transforms/Utils to Analysis.Dan Gohman2009-10-132-173/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83998 91177308-0d34-0410-b5e6-96231b3b80d8
* Start refactoring the inline cost estimation code so that it can be usedDan Gohman2009-10-131-8/+16
| | | | | | | for purposes other than inlining. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83997 91177308-0d34-0410-b5e6-96231b3b80d8
* add a simple helper method.Chris Lattner2009-10-101-0/+4
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83745 91177308-0d34-0410-b5e6-96231b3b80d8
* add ability for clients of SSAUpdater to find out about theChris Lattner2009-10-101-1/+10
| | | | | | | PHI nodes inserted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83744 91177308-0d34-0410-b5e6-96231b3b80d8
* add the ability to get a rewritten value from the middle of a block,Chris Lattner2009-10-101-3/+27
| | | | | | | | not just at the end. Add a big comment explaining when this could be useful (which never happens for jump threading). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83741 91177308-0d34-0410-b5e6-96231b3b80d8
* rename GetValueInBlock -> GetValueAtEndOfBlock to better reflect Chris Lattner2009-10-101-4/+4
| | | | | | | what it does. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83740 91177308-0d34-0410-b5e6-96231b3b80d8
* Implement an efficient and fully general SSA update mechanism that Chris Lattner2009-10-101-0/+71
| | | | | | | works on unstructured CFGs. This implements PR217, our oldest open PR. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83705 91177308-0d34-0410-b5e6-96231b3b80d8
* Use names instead of numbers for some of the magicDale Johannesen2009-10-091-0/+8
| | | | | | | | | constants used in inlining heuristics (especially those used in more than one file). No functional change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83675 91177308-0d34-0410-b5e6-96231b3b80d8
* remove predicate simplifier, it never got the last bugs beatenChris Lattner2009-10-061-7/+0
| | | | | | | | | out of it, and jump threading, condprop and gvn are now getting most of the benefit. This was approved by Nicholas and Nicolas. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83390 91177308-0d34-0410-b5e6-96231b3b80d8
* Do away with the strange use of BitVectors in SSI, and just use normal sets. ↵Owen Anderson2009-10-041-19/+11
| | | | | | This makes the code much more C++/LLVM-ish. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83286 91177308-0d34-0410-b5e6-96231b3b80d8
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