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2011-01-03CMake: Add missing source file.Michael J. Spencer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122724 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03Allocate nodes for the scoped hash table from a recyling bump pointerChris Lattner
allocator. This speeds up early cse by about 20% git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122723 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03really get this working with a custom allocator.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122722 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03Enhance ScopedHashTable to allow it to take an allocator argument.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122721 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03reduce redundancy in the hashing code and other misc cleanups.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122720 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-03Add a new loop-instsimplify pass, with the intention of replacing the instanceCameron Zwarich
of instcombine that is currently in the middle of the loop pass pipeline. This commit only checks in the pass; it will hopefully be enabled by default later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122719 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02fix some pastosChris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122718 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02add DEBUG and -stats output to earlycse.Chris Lattner
Teach it to CSE the rest of the non-side-effecting instructions. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122716 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Enhance earlycse to do CSE of casts, instsimplify and die.Chris Lattner
Add a testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122715 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02split dom frontier handling stuff out to its own DominanceFrontier header,Chris Lattner
so that Dominators.h is *just* domtree. Also prune #includes a bit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122714 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02sketch out a new early cse pass. No functionality yet.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122713 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02fix a miscompilation of tramp3d-v4: when forming a memcpy, we have to makeChris Lattner
sure that the loop we're promoting into a memcpy doesn't mutate the input of the memcpy. Before we were just checking that the dest of the memcpy wasn't mod/ref'd by the loop. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122712 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02If a loop iterates exactly once (has backedge count = 0) then don'tChris Lattner
mess with it. We'd rather peel/unroll it than convert all of its stores into memsets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122711 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Try to reuse the value when lowering memset.Benjamin Kramer
This allows us to compile: void test(char *s, int a) { __builtin_memset(s, a, 15); } into 1 mul + 3 stores instead of 3 muls + 3 stores. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122710 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Lower the i8 extension in memset to a multiply instead of a potentially long ↵Benjamin Kramer
series of shifts and ors. We could implement a DAGCombine to turn x * 0x0101 back into logic operations on targets that doesn't support the multiply or it is slow (p4) if someone cares enough. Example code: void test(char *s, int a) { __builtin_memset(s, a, 4); } before: _test: ## @test movzbl 8(%esp), %eax movl %eax, %ecx shll $8, %ecx orl %eax, %ecx movl %ecx, %eax shll $16, %eax orl %ecx, %eax movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret after: _test: ## @test movzbl 8(%esp), %eax imull $16843009, %eax, %eax ## imm = 0x1010101 movl 4(%esp), %ecx movl %eax, 4(%ecx) movl %eax, (%ecx) ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122707 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02A workaround for a bug in cmake 2.8.3 diagnosed on PR 8885.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122706 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Also remove functions that use complex constant expressions in terms ofNick Lewycky
another function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122705 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02enhance loop idiom recognition to scan *all* unconditionally executedChris Lattner
blocks in a loop, instead of just the header block. This makes it more aggressive, able to handle Duncan's Ada examples. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122704 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02make inSubLoop much more efficient.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122703 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02rip out isExitBlockDominatedByBlockInLoop, calling DomTree::dominates instead.Chris Lattner
isExitBlockDominatedByBlockInLoop is a relic of the days when domtree was *just* a tree and didn't have DFS numbers. Checking DFS numbers is faster and easier than "limiting the search of the tree". git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122702 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02add a list of opportunities for future improvement.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122701 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02update a bunch of entries.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122700 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Fix PR8702 by not having LoopSimplify claim to preserve LCSSA form. As ↵Duncan Sands
described in the PR, the pass could break LCSSA form when inserting preheaders. It probably would be easy enough to fix this, but since currently we always go into LCSSA form after running this pass, doing so is not urgent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122695 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Remove an unused member function.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122693 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Propagate to parent scope changes made to CMAKE_CXX_FLAGS.Oscar Fuentes
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122692 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Fix a typo in a variable name.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122691 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Move a load into the only branch where it is used and eliminate a temporary.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122690 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Add the explanatory comment from r122680's commit message to the code itself.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122689 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Tidy up indentation.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122688 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Fix a typo, which should also fix the failure on llvm-x86_64-linux-checks.Cameron Zwarich
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122687 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Allow loop-idiom to run on multiple BB loops, but still only scan the loop Chris Lattner
header for now for memset/memcpy opportunities. It turns out that loop-rotate is successfully rotating loops, but *DOESN'T MERGE THE BLOCKS*, turning "for loops" into 2 basic block loops that loop-idiom was ignoring. With this fix, we form many *many* more memcpy and memsets than before, including on the "history" loops in the viterbi benchmark, which look like this: for (j=0; j<MAX_history; ++j) { history_new[i][j+1] = history[2*i][j]; } Transforming these loops into memcpy's speeds up the viterbi benchmark from 11.98s to 3.55s on my machine. Woo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122685 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Remove the #ifdef'd code for balancing the eval-link data structure. It doesn'tCameron Zwarich
compile, and everyone's tests have shown it to be slower in practice, even for quite large graphs. I also hope to do an optimization that is only correct with the simpler data structure, which would break this even further. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122684 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02remove debugging code.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122683 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02add some -stats output.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122682 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02improve loop rotation to use CodeMetrics to analyze theChris Lattner
size of a loop header instead of its own code size estimator. This allows it to handle bitcasts etc more precisely. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122681 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Speed up dominator computation some more by optimizing bucket processing. WhenCameron Zwarich
naively implemented, the Lengauer-Tarjan algorithm requires a separate bucket for each vertex. However, this is unnecessary, because each vertex is only placed into a single bucket (that of its semidominator), and each vertex's bucket is processed before it is added to any bucket itself. Instead of using a bucket per vertex, we use a single array Buckets that has two purposes. Before the vertex V with DFS number i is processed, Buckets[i] stores the index of the first element in V's bucket. After V's bucket is processed, Buckets[i] stores the index of the next element in the bucket to which V now belongs, if any. Reading from the buckets can also be optimized. Instead of processing the bucket of V's parent at the end of processing V, we process the bucket of V itself at the beginning of processing V. This means that the case of the root vertex can be simplified somewhat. It also means that we don't need to look up the DFS number of the semidominator of every node in the bucket we are processing, since we know it is the current index being processed. This is a 6.5% speedup running -domtree on test-suite + SPEC2000/2006, with larger speedups of around 12% on the larger benchmarks like GCC. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122680 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02teach loop idiom recognition to form memcpy's from simple loops.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122678 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-02Remove functions from the FnSet when one of their callee's is being merged. ThisNick Lewycky
maintains the guarantee that the DenseSet expects two elements it contains to not go from inequal to equal under its nose. As a side-effect, this also lets us switch from iterating to a fixed-point to actually maintaining a work queue of functions to look at again, and we don't add thunks to our work queue so we don't need to detect and ignore them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122677 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01a missed __builtin_object_size case.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122676 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01various updates.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122675 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01fix a globalopt crash on two Adobe-C++ testcases that the recentChris Lattner
loop idiom pass exposed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122674 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Fix darwin bots.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122672 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Remove empty directories left behind by git-svn users.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122671 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Add support for the 'H' modifier.Rafael Espindola
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122667 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Update the testAnton Korobeynikov
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122666 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01turn on memset idiom recognition by default. Though there are still lots ofChris Lattner
limitations, this kicks in dozens of times in the 4 specfp2000 benchmarks, and hundreds of times in the int part. It also kicks in hundreds of times in multisource. This kicks in right before loop deletion, which has the pleasant effect of deleting loops that *just* do a memset. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122664 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Model operand restrictions of mul-like instructions on ARMv5 viaAnton Korobeynikov
earlyclobber stuff. This should fix PRs 2313 and 8157. Unfortunately, no testcase, since it'd be dependent on register assignments. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122663 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01add a validity check that was missed, fixing a crash on theChris Lattner
new testcase. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122662 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01Revert commit 122654 at the request of Chris, who reckons that instsimplifyDuncan Sands
is the wrong hammer for this nail, and is probably right. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122661 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-01improve validity check to handle constant-trip-count loops moreChris Lattner
aggressively. In practice, this doesn't help anything though, see the todo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122660 91177308-0d34-0410-b5e6-96231b3b80d8
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