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* CostModel: increase the default cost of supported floating point operations ↵Nadav Rotem2013-04-122-4/+29
| | | | | | from 1 to two. Fixed a few tests that changes because now the cost of one insert + a vector operation on two doubles is lower than two scalar operations on doubles. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179413 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Fix an invalid reference bugHal Finkel2013-02-171-0/+98
| | | | | | | | | | | | | | This fixes PR15289. This bug was introduced (recently) in r175215; collecting all std::vector references for candidate pairs to delete at once is invalid because subsequent lookups in the owning DenseMap could invalidate the references. bugpoint was able to reduce a useful test case. Unfortunately, because whether or not this asserts depends on memory layout, this test case will sometimes appear to produce valid output. Nevertheless, running under valgrind will reveal the error. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175397 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Use VTTI to compute costs for intrinsics vectorizationHal Finkel2012-12-261-0/+79
| | | | | | | | | | | | For the time being this includes only some dummy test cases. Once the generic implementation of the intrinsics cost function does something other than assuming scalarization in all cases, or some target specializes the interface, some real test cases can be added. Also, for consistency, I changed the type of IID from unsigned to Intrinsic::ID in a few other places. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171079 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Don't vectorize vector-manipulation chainsHal Finkel2012-11-131-0/+170
| | | | | | | | Don't choose a vectorization plan containing only shuffles and vector inserts/extracts. Due to inperfections in the cost model, these can lead to infinite recusion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167811 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Only some insert element operand pairs are free.Hal Finkel2012-11-121-0/+85
| | | | | | | | This fixes another infinite recursion case when using target costs. We can only replace insert element input chains that are pure (end with inserting into an undef). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167784 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Use a more sophisticated check for input costHal Finkel2012-11-121-0/+54
| | | | | | | | | The old checking code, which assumed that input shuffles and insert-elements could always be folded (and thus were free) is too simple. This can only happen in special circumstances. Using the simple check caused infinite recursion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167750 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Check the types of compare instructionsHal Finkel2012-11-121-0/+16
| | | | | | | The pass would previously assert when trying to compute the cost of compare instructions with illegal vector types (like struct pointers). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167743 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Check the input types of shuffles for legalityHal Finkel2012-11-121-0/+25
| | | | | | | | | | This fixes a bug where shuffles were being fused such that the resulting input types were not legal on the target. This would occur only when both inputs and dependencies were also foldable operations (such as other shuffles) and there were other connected pairs in the same block. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167731 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Commit the rest of the test-case change.Hal Finkel2012-11-011-41/+1
| | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167257 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Use target costs for incoming and outgoing values instead of ↵Hal Finkel2012-11-012-11/+99
| | | | | | | | | | | the depth heuristic. When target cost information is available, compute explicit costs of inserting and extracting values from vectors. At this point, all costs are estimated using the target information, and the chain-depth heuristic is not needed. As a result, it is now, by default, disabled when using target costs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167256 91177308-0d34-0410-b5e6-96231b3b80d8
* BBVectorize: Choose pair ordering to minimize shufflesHal Finkel2012-10-312-2/+2
| | | | | | | | | | | | | | | | | | | | BBVectorize would, except for loads and stores, always fuse instructions so that the first instruction (in the current source order) would always represent the low part of the input vectors and the second instruction would always represent the high part. This lead to too many shuffles being produced because sometimes the opposite order produces fewer of them. With this change, BBVectorize tracks the kind of pair connections that form the DAG of candidate pairs, and uses that information to reorder the pairs to avoid excess shuffles. Using this information, a future commit will be able to add VTTI-based shuffle costs to the pair selection procedure. Importantly, the number of remaining shuffles can now be estimated during pair selection. There are some trivial instruction reorderings in the test cases, and one simple additional test where we certainly want to do a reordering to avoid an unnecessary shuffle. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167122 91177308-0d34-0410-b5e6-96231b3b80d8
* Remove an invalid assert in TargetTransformImplHal Finkel2012-10-301-0/+12
| | | | | | | getCastInstrCost had an assert prohibiting scalar to vector casts. Such casts, however, are allowed. This should make the vectorizer buildbot happier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166998 91177308-0d34-0410-b5e6-96231b3b80d8
* Move target-specific BBVectorize tests into a separate directory.Hal Finkel2012-10-262-0/+137
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166802 91177308-0d34-0410-b5e6-96231b3b80d8