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Implement the interfaces to update value numbering information. Add an

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assert.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13679 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-05-23 21:13:24 +00:00
parent ab8c565768
commit 0f312d6998
1 changed files with 24 additions and 2 deletions
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26
lib/Analysis/LoadValueNumbering.cpp
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@ -56,6 +56,24 @@ namespace {
virtual void getEqualNumberNodes(Value *V1,
std::vector<Value*> &RetVals) const;
/// deleteValue - This method should be called whenever an LLVM Value is
/// deleted from the program, for example when an instruction is found to be
/// redundant and is eliminated.
///
virtual void deleteValue(Value *V) {
getAnalysis<AliasAnalysis>().deleteValue(V);
}
/// copyValue - This method should be used whenever a preexisting value in
/// the program is copied or cloned, introducing a new value. Note that
/// analysis implementations should tolerate clients that use this method to
/// introduce the same value multiple times: if the analysis already knows
/// about a value, it should ignore the request.
///
virtual void copyValue(Value *From, Value *To) {
getAnalysis<AliasAnalysis>().copyValue(From, To);
}
/// getCallEqualNumberNodes - Given a call instruction, find other calls
/// that have the same value number.
void getCallEqualNumberNodes(CallInst *CI,
@ -103,7 +121,7 @@ static bool isPathTransparentTo(BasicBlock *CurBlock, BasicBlock *Dom,
TransparentBlocks.insert(TBI, std::make_pair(CurBlock, false));
return false;
}
TransparentBlocks.insert(TBI, std::make_pair(CurBlock, true));
TransparentBlocks.insert(TBI, std::make_pair(CurBlock, true));
} else if (!TBI->second)
// This block is known non-transparent, so that path can't be either.
return false;
@ -505,8 +523,12 @@ void LoadVN::getEqualNumberNodes(Value *V,
BasicBlock::iterator BBI = I->first->end();
while (1) {
assert(BBI != I->first->begin() &&
"There is a store in this block of the pointer, but the store"
" doesn't mod the address being stored to?? Must be a bug in"
" the alias analysis implementation!");
--BBI;
if (AA.getModRefInfo(BBI, LoadPtr, LoadSize)& AliasAnalysis::Mod){
if (AA.getModRefInfo(BBI, LoadPtr, LoadSize) & AliasAnalysis::Mod) {
// If the invalidating instruction is one of the candidates,
// then it provides the value the load loads.
if (StoreInst *SI = dyn_cast<StoreInst>(BBI))