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2010-05-03In SimplifyICmpOperands, avoid needlessly swapping the operands in theDan Gohman
case where both are addrecs in unrelated loops. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102924 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-03Factor out the new <= and >= analysis code into SimplifyICmpOperands.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102922 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-01Added a variant of InlineCostAnalyzer::getInlineCost() that takes the called ↵David Chisnall
function as an explicit argument, for use when inlining function pointers. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102841 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-01fix PR5009 by making CGSCCPM realize that a call was devirtualizedChris Lattner
if an indirect call site was removed and a direct one was added, not just if an indirect call site was modified to be direct. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102830 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-01Implement rdar://6295824 and PR6724 with two tiny changesChris Lattner
that can have a big effect :). The first is to enable the iterative SCC passmanager juice that kicks in when the scc passmgr detects that a function pass has devirtualized a call. In this case, it will rerun all the passes it manages on the SCC, up to the iteration count limit (4). This is useful because a function pass may devirualize a call, and we want the inliner to inline it, or pruneeh to infer stuff about it, etc. The second patch is to add *all* call sites to the DevirtualizedCalls list the inliner uses. This list is about to get renamed, but the jist of this is that the inliner now reconsiders *all* inlined call sites as candidates for further inlining. The intuition is this that in cases like this: f() { g(1); } g(int x) { h(x); } We analyze this bottom up, and may decide that it isn't profitable to inline H into G. Next step, we decide that it is profitable to inline G into F, and do so, which means that F now calls H. Even though the call from G -> H may not have been profitable to inline, the call from F -> H may be (in this case because a constant allows folding etc). In my spot checks, this doesn't have a big impact on code. For example, the LLC output for 252.eon grew from 0.02% (from 317252 to 317308) and 176.gcc actually shrunk by .3% (from 1525612 to 1520964 bytes). 252.eon never iterated in the SCC Passmgr, 176.gcc iterated at most 1 time. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102823 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-30Dan recently disabled recursive inlining within a function, but weChris Lattner
were still inlining self-recursive functions into other functions. Inlining a recursive function into itself has the potential to reduce recursion depth by a factor of 2, inlining a recursive function into something else reduces recursion depth by exactly 1. Since inlining a recursive function into something else is a weird form of loop peeling, turn this off. The deleted testcase was added by Dale in r62107, since then we're leaning towards not inlining recursive stuff ever. In any case, if we like inlining recursive stuff, it should be done within the recursive function itself to get the algorithm recursion depth win. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102798 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-30Attach AT_APPLE_optimized attribute to optimized function's debug info.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102743 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-30Set isSigned to true when creating an all-ones integer constant, evenDan Gohman
for unsigned purposes, so >64-bit integer values get a full all-ones value. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102739 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-30Silence compiler warnings.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102734 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-30Add lint checks for invalid uses of memory.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102733 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-29Refactor.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102661 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-26When checking whether the special handling for an addrec increment whichDan Gohman
doesn't dominate the header is needed, don't check whether the increment expression has computable loop evolution. While the operands of an addrec are required to be loop-invariant, they're not required to dominate any part of the loop. This fixes PR6914. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102389 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24ScalarEvolution support for <= and >= loops.Dan Gohman
Also, generalize ScalarEvolutions's min and max recognition to handle some new forms of min and max that this change makes more common. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102234 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Use SimplifyICmpOperands in isKnownPredicate too.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102233 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Update isImpliedCond to use the new SimplifyICmpOperands utility.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102232 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-24Add a new utility function SimplifyICmpOperands. Much of this code isDan Gohman
refactored out of ScalarEvolution::isImpliedCond, which will be updated to use this new utility routine soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102229 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23fix callgraph dump to not print 0x0x1234 for nodes.Chris Lattner
Add the instruction pointer value for debuggability. We now get dump output that looks like this: Call graph node for function: 'f1'<<0x1017086b0>> #uses=1 CS<0x1017046f8> calls external node Call graph node for function: '_ZNSt6vectorIdSaIdEEC1EmRKdRKS0_'<<0x1017086f0>> #uses=1 CS<0x0> calls external node Call graph node for function: 'f4'<<0x1017087a0>> #uses=1 CS<0x101708c88> calls function 'f3' git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102194 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23Fix LSR to tolerate cases where ScalarEvolution initiallyDan Gohman
misses an opportunity to fold add operands, but folds them after LSR has separated them out. This fixes rdar://7886751. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102157 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-23When it doesn't matter whether zero or sign extension is used,Dan Gohman
use ScalarEvolutions "any" extend function. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102156 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22add a DEBUG call so that -debug lists when CGSCCPM iterates.Chris Lattner
Fix RefreshCallGraph to use CGN->replaceCallEdge instead of hand rolling its own loop. replaceCallEdge properly maintains the reference counts of the nodes, fixing a crash exposed by the iterative callgraph stuff. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102120 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Don't attempt to analyze values which are obviously undef. This fixes someDan Gohman
assertion failures in extreme cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102042 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-22Tidy a comment.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102041 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Make ScalarEvolution::getConstant support pointer types, for consistencyDan Gohman
with ScalarEvolution's overall approach to pointer types. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102003 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Implement (but don't enable) PR6724 and rdar://6295824. In short,Chris Lattner
we have RefreshCallGraph detect when a function pass devirtualizes a call, and have CGSCCPassMgr iterate (up to a count) when this happens. This allows (in the example) GVN to devirtualize the call in foo, then the inliner to inline it away. This is not currently enabled because I haven't done any analysis on the (potentially substantial) code size or performance impact of doing this, and guess what, it exposes callgraph updating bugs in various passes. This is progress though, and you can play with it by passing -max-cg-scc-iterations=5 to opt. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101973 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-21Revert r101471. For tight recursive functions which have multipleDan Gohman
recursive callsites, inlining can reduce the number of calls by exponential factors, as it does in MultiSource/Benchmarks/Olden/treeadd. More involved heuristics will be needed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101969 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20PR6880: Don't dereference CallsExternalNode if it's NULL.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101897 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20move some select simplifications out out instcombine intoChris Lattner
inst simplify. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101873 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-20make CallGraphNode dtor abort if a node is deleted when there are stillChris Lattner
references to it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101847 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-19Remove the Expr member from IVUsers. Instead of remembering the expression,Dan Gohman
just ask ScalarEvolution for it on demand. This helps IVUsers be more robust in the case of expressions changing underneath it. This fixes PR6862. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101819 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17fix PR6858: a dangling pointer use bug which was causedChris Lattner
by switching CachedFunctionInfo from a std::map to a ValueMap (which is implemented in terms of a DenseMap). DenseMap has different iterator invalidation semantics than std::map. This should hopefully fix the dragonegg builder. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101658 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17a bunch of cleanups and tweaks, no functionality changes.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101657 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17reenable r101565, removing a problematic assertion.Chris Lattner
CGSCC can delete nodes in regions of the callgraph that have already been visited. If new CG nodes are allocated to the same pointer, we shouldn't abort, just handle it correctly by assigning a new number. This should restore stability by removing invalidated pointers that *will* be reused from the densemap in the iterator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101628 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-17disable r101565: an assert is getting triggered. More lurking badness no doubt.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101583 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Revert 101465, it broke internal OpenGL testing.Eric Christopher
Probably the best way to know that all getOperand() calls have been handled is to replace that API instead of updating. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101579 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16building on the new CallGraphSCC abstraction, teach CallGraphSCCPassManager Chris Lattner
to keep the node entries in scc_iterator up to date instead of dangling as the SCC mutates. This is a really terrible problem which was causing -g to affect codegen because it would permute the memory image of the compiler process. Thanks to Dale for expertly hunting it down. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101565 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16move ReplaceNode out of line, rename scc_iterator::fini -> isAtEnd().Chris Lattner
No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101562 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16introduce a new CallGraphSCC class, and pass it aroundChris Lattner
to CallGraphSCCPass's instead of passing around a std::vector<CallGraphNode*>. No functionality change, but now we have a much tidier interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101558 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16move PrintCallGraphPass out of the middle of CGPassManager.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101543 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Disable inlining of recursive calls. It can complicate tailcallelim andDan Gohman
dependent analyses, and increase code size, so doing it profitably would require more complex heuristics. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101471 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16reapply r101434Gabor Greif
with a fix for self-hosting rotate CallInst operands, i.e. move callee to the back of the operand array the motivation for this patch are laid out in my mail to llvm-commits: more efficient access to operands and callee, faster callgraph-construction, smaller compiler binary git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101465 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Make callIsSmall accessible as a utility function.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101463 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16Fix SCEVCommutativeExpr::print to be robust in the case of improperDan Gohman
expression canonicalization. Its job is to print what's there, not to make judgements about it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101461 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-16back out r101423 and r101397, they break llvm-gcc self-host on darwin10Gabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101434 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15reapply r101364, which has been backed out in r101368Gabor Greif
with a fix rotate CallInst operands, i.e. move callee to the back of the operand array the motivation for this patch are laid out in my mail to llvm-commits: more efficient access to operands and callee, faster callgraph-construction, smaller compiler binary git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101397 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15Fix a bunch of namespace polution.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101376 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15Make getPredecessorWithUniqueSuccessorForBB return the unique successorDan Gohman
in addition to the predecessor. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101374 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15back out r101364, as it trips the linux nightlybot on some clang C++ testsGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101368 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15rotate CallInst operands, i.e. move callee to the backGabor Greif
of the operand array the motivation for this patch are laid out in my mail to llvm-commits: more efficient access to operands and callee, faster callgraph-construction, smaller compiler binary git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101364 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14Constify GetConstantStringInfo.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101298 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14performance: cache the dereferenced use_iteratorGabor Greif
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101265 91177308-0d34-0410-b5e6-96231b3b80d8
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