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path: root/include/llvm/Analysis/MemoryDependenceAnalysis.h
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2008-12-05Make it illegal to call getDependency* on non-memory instructionsChris Lattner
like binary operators. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60600 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-01cleanups suggested by duncan, thanks!Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60353 91177308-0d34-0410-b5e6-96231b3b80d8
2008-12-01Reimplement the non-local dependency data structure in terms of a sortedChris Lattner
vector instead of a densemap. This shrinks the memory usage of this thing substantially (the high water mark) as well as making operations like scanning it faster. This speeds up memdep slightly, gvn goes from 3.9376 to 3.9118s on 403.gcc This also splits out the statistics for the cached non-local case to differentiate between the dirty and clean cached case. Here's the stats for 403.gcc: 6153 memdep - Number of dirty cached non-local responses 169336 memdep - Number of fully cached non-local responses 162428 memdep - Number of uncached non-local responses yay for caching :) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60313 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30Eliminate the DepResultTy abstraction. It is now completely Chris Lattner
redundant with MemDepResult, and MemDepResult has a nicer interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60308 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30Cache TargetData/AliasAnalysis in the pass instead of callingChris Lattner
getAnalysis<>. getAnalysis<> is apparently extremely expensive. Doing this speeds up GVN on 403.gcc by 16%! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60304 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30Two changes: Make getDependency remove QueryInst for a dirty record'sChris Lattner
ReverseLocalDeps when we update it. This fixes a regression test failure from my last commit. Second, for each non-local cached information structure, keep a bit that indicates whether it is dirty or not. This saves us a scan over the whole thing in the common case when it isn't dirty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60274 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30introduce a typedef, no functionality change.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60272 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30Change NonLocalDeps to be a densemap of pointers to densemapChris Lattner
instead of containing them by value. This increases the density (!) of NonLocalDeps as well as making the reallocation case faster. This speeds up gvn on 403.gcc by 2% and makes room for future improvements. I'm not super thrilled with having to explicitly manage the new/delete of the map, but it is necesary for the next change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60271 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30implement a fixme by introducing a new getDependencyFromInternalChris Lattner
method that returns its result as a DepResultTy instead of as a MemDepResult. This reduces conversion back and forth. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60266 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-30REmove an old fixme, resolve another fixme by adding liberalChris Lattner
comments about what this class does. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60264 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Eliminate the dropInstruction method, which is not needed any more.Chris Lattner
Fix a subtle iterator invalidation bug I introduced in the last commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60258 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29implement some fixme's: when deleting an instruction withChris Lattner
an entry in the nonlocal deps map, don't reset entries referencing that instruction to [dirty, null], instead, set them to [dirty,next] where next is the instruction after the deleted one. Use this information in the non-local deps code to avoid rescanning entire blocks. This speeds up GVN slightly by avoiding pointless work. On 403.gcc this makes GVN 1.5% faster. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60256 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Change MemDep::getNonLocalDependency to return its results asChris Lattner
a smallvector instead of a DenseMap. This speeds up GVN by 5% on 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60255 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29reimplement getNonLocalDependency with a simpler worklistChris Lattner
formulation that is faster and doesn't require nonLazyHelper. Much less code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60253 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29tidy up some variable names.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60243 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29rename some maps.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60242 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Split getDependency into getDependency and getDependencyFrom, the Chris Lattner
former does caching, the later doesn't. This dramatically simplifies the logic in getDependency and getDependencyFrom. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60234 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Now that DepType is private, we can start cleaning up some of its uses:Chris Lattner
Document the Dirty value more precisely, use it for the uninitialized DepResultTy value. Change reverse mappings to be from an instruction* instead of DepResultTy, and stop tracking other forms. This makes it more clear that we only care about the instruction cases. Eliminate a DepResultTy,bool pair by using Dirty in the local case as well, shrinking the map and simplifying the code. This speeds up GVN by ~3% on 403.gcc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60232 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Introduce and use a new MemDepResult class to hold the results of a memdepChris Lattner
query. This makes it crystal clear what cases can escape from MemDep that the clients have to handle. This also gives the clients a nice simplified interface to it that is easy to poke at. This patch also makes DepResultTy and MemoryDependenceAnalysis::DepType private, yay. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60231 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-29Reimplement the internal abstraction used by MemDep in termsChris Lattner
of a pointer/int pair instead of a manually bitmangled pointer. This forces clients to think a little more about checking the appropriate pieces and will be useful for internal implementation improvements later. I'm not particularly happy with this. After going through this I don't think that the clients of memdep should be exposed to the internal type at all. I'll fix this in a subsequent commit. This has no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60230 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28comment cleanups.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60220 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28forward declare CallSite instead of #includ'ing it.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60217 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28rename "ping" to "verifyRemoved". I don't know why 'ping' what chosen,Chris Lattner
but it doesn't make any sense at all. Also make the method const, private, and fit in 80 cols while we're at it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60215 91177308-0d34-0410-b5e6-96231b3b80d8
2008-11-28comment and indentation improvements.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60214 91177308-0d34-0410-b5e6-96231b3b80d8
2008-09-04Tidy up several unbeseeming casts from pointer to intptr_t.Dan Gohman
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55779 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19PassInfo keep tracks whether a pass is an analysis pass or not.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48554 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-19Do not use virtual function to identify an analysis pass.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48520 91177308-0d34-0410-b5e6-96231b3b80d8
2008-03-18Identify Analysis pass.Devang Patel
Do not run analysis pass again if analysis info is still available. This fixes PR1441. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48476 91177308-0d34-0410-b5e6-96231b3b80d8
2008-02-12Re-apply the patch to improve the optimizations of memcpy's, with severalOwen Anderson
bugs fixed. This now passes PPC bootstrap. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47026 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-29Don't attribute in file headers anymore. See llvmdev for theChris Lattner
discussion of this change. Boy are my fingers tired. ;-) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45411 91177308-0d34-0410-b5e6-96231b3b80d8
2007-12-08Fix several cache coherence bugs in MemDep/GVN that were found. Also add ↵Owen Anderson
some (disabled) debugging code to make such problems easier to diagnose in the future, written by Duncan Sands. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44695 91177308-0d34-0410-b5e6-96231b3b80d8
2007-09-19Add a flag to mark a dirty cache entry. This is not yet used, but will ↵Owen Anderson
eventually help non-local memdep caching. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42137 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-16Cache non-local memory dependence analysis. This is a significant compileOwen Anderson
time performance win in most cases. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@41126 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-09Make NonLocal and None const in the right way. :-)Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40961 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08Add one more comment.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40949 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08Cleanup and comment-ize the memdep header.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40948 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-08Change the None and NonLocal markers in memdep to be const.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40946 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07Get rid of unnecessary #include.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40885 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-07Clean up a bunch of caching stuff in memdep. This reduces the time to run GVNOwen Anderson
on 403.gcc from ~15s to ~10s. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40884 91177308-0d34-0410-b5e6-96231b3b80d8
2007-08-01Make non-local memdep not be recursive, and fix a bug on 403.gcc that this ↵Owen Anderson
exposed. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40692 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-31Fix GLIBCXX_DEBUG error owing to dereference of end iterator. There'sDavid Greene
no guarantee that an instruction returned by getDependency exists in the maps. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40647 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-25Forgot to include this file in my last commit.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40496 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-25Add basic support for performing whole-function RLE.Owen Anderson
Note: This has not yet been thoroughly tested. Use at your own risk. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40489 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-24Add initial support for non-local memory dependence analysis.Owen Anderson
NOTE: This has only been cursorily tested. Expected improvements soon. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40476 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-16Add support for walking up memory def chains, which enables finding many moreOwen Anderson
dead stores on 400.perlbench. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@39929 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-10Add support for finding the dependencies of call and invoke instructions.Owen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38497 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-10Fix a bunch of things from Chris' feedbackOwen Anderson
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@38493 91177308-0d34-0410-b5e6-96231b3b80d8
2007-07-06A first stab at memory dependence analysis. This is an interface on top ofOwen Anderson
alias analysis, adding caching and lazy computation of queries. This will be used in planned improvements to memory access optimizations. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37958 91177308-0d34-0410-b5e6-96231b3b80d8
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