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c89c6a964c
straight-forward implementation. This does not require any extra alias analysis queries beyond what we already do for non-local loads. Some programs really really like load PRE. For example, SPASS triggers this ~1000 times, ~300 times in 255.vortex, and ~1500 times on 403.gcc. The biggest limitation to the implementation is that it does not split critical edges. This is a huge killer on many programs and should be addressed after the initial patch is enabled by default. The implementation of this should incidentally speed up rejection of non-local loads because it avoids creating the repl densemap in cases when it won't be used for fully redundant loads. This is currently disabled by default. Before I turn this on, I need to fix a couple of miscompilations in the testsuite, look at compile time performance numbers, and look at perf impact. This is pretty close to ready though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60408 91177308-0d34-0410-b5e6-96231b3b80d8 |
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| .. | ||
| 2007-07-25-DominatedLoop.ll | ||
| 2007-07-25-InfiniteLoop.ll | ||
| 2007-07-25-Loop.ll | ||
| 2007-07-25-NestedLoop.ll | ||
| 2007-07-25-SinglePredecessor.ll | ||
| 2007-07-26-InterlockingLoops.ll | ||
| 2007-07-26-NonRedundant.ll | ||
| 2007-07-26-PhiErasure.ll | ||
| 2007-07-30-PredIDom.ll | ||
| 2007-07-31-NoDomInherit.ll | ||
| 2007-07-31-RedundantPhi.ll | ||
| 2008-02-12-UndefLoad.ll | ||
| 2008-02-13-NewPHI.ll | ||
| 2008-02-24-NonDominatedMemcpy.ll | ||
| 2008-02-26-MemCpySize.ll | ||
| 2008-07-02-Unreachable.ll | ||
| basic.ll | ||
| call.ll | ||
| dg.exp | ||
| dominated.ll | ||
| local-pre.ll | ||
| mixed.ll | ||
| nonlocal-cse.ll | ||
| nonlocal.ll | ||
| pre-load.ll | ||
| pre.ll | ||
| rle-must-alias.ll | ||
| semidominated.ll | ||