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Add verification functions to GVN which check to see that an instruction was

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truely deleted. These will be expanded with further checks of all of the data
structures.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61347 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2008-12-22 21:36:08 +00:00
parent 00d448a341
commit 246dbbb8be
1 changed files with 18 additions and 0 deletions
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18
lib/Transforms/Scalar/GVN.cpp
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@ -173,6 +173,7 @@ namespace {
void setMemDep(MemoryDependenceAnalysis* M) { MD = M; }
void setDomTree(DominatorTree* D) { DT = D; }
uint32_t getNextUnusedValueNumber() { return nextValueNumber; }
void verifyRemoved(const Value *) const;
};
}
@ -678,6 +679,15 @@ void ValueTable::erase(Value* V) {
valueNumbering.erase(V);
}
/// verifyRemoved - Verify that the value is removed from all internal data
/// structures.
void ValueTable::verifyRemoved(const Value *V) const {
for (DenseMap<Value*, uint32_t>::iterator
I = valueNumbering.begin(), E = valueNumbering.end(); I != E; ++I) {
assert(I->first != V && "Inst still occurs in value numbering map!");
}
}
//===----------------------------------------------------------------------===//
// GVN Pass
//===----------------------------------------------------------------------===//
@ -741,6 +751,7 @@ namespace {
bool mergeBlockIntoPredecessor(BasicBlock* BB);
Value* AttemptRedundancyElimination(Instruction* orig, unsigned valno);
void cleanupGlobalSets();
void verifyRemoved(const Instruction *I) const;
};
char GVN::ID = 0;
@ -859,6 +870,7 @@ Value *GVN::GetValueForBlock(BasicBlock *BB, Instruction* orig,
DEBUG(cerr << "GVN removed: " << *PN);
MD->removeInstruction(PN);
PN->eraseFromParent();
DEBUG(verifyRemoved(PN));
Phis[BB] = v;
return v;
@ -1640,3 +1652,9 @@ void GVN::cleanupGlobalSets() {
delete I->second;
localAvail.clear();
}
/// verifyRemoved - Verify that the specified instruction does not occur in our
/// internal data structures.
void GVN::verifyRemoved(const Instruction *I) const {
VN.verifyRemoved(I);
}