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The phi translated pointer can be computed when returning a partially cached result

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instead of stored.  This reduces memdep memory usage, and also eliminates a bunch of
weakvh's.  This speeds up gvn on gcc.c-torture/20001226-1.c from 23.9s to 8.45s (2.8x)
on a different machine than earlier.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91885 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-12-22 04:25:02 +00:00
parent 3ea3c24619
commit 0ee443d169
3 changed files with 52 additions and 34 deletions
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2
lib/Transforms/Scalar/GVN.cpp
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@@ -1358,7 +1358,7 @@ static bool isLifetimeStart(Instruction *Inst) {
bool GVN::processNonLocalLoad(LoadInst *LI,
SmallVectorImpl<Instruction*> &toErase) {
// Find the non-local dependencies of the load.
SmallVector<NonLocalDepEntry, 64> Deps;
SmallVector<NonLocalDepResult, 64> Deps;
MD->getNonLocalPointerDependency(LI->getOperand(0), true, LI->getParent(),
Deps);
//DEBUG(errs() << "INVESTIGATING NONLOCAL LOAD: "