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Revamp the ValueMapper interfaces in a couple ways:

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1. Take a flags argument instead of a bool.  This makes
   it more clear to the reader what it is used for.
2. Add a flag that says that "remapping a value not in the
   map is ok".
3. Reimplement MapValue to share a bunch of code and be a lot
   more efficient.  For lookup failures, don't drop null values
   into the map.
4. Using the new flag a bunch of code can vaporize in LinkModules
   and LoopUnswitch, kill it.

No functionality change.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123058 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2011-01-08 08:15:20 +00:00
parent 6ccb365293
commit b5fa5fcecc
7 changed files with 108 additions and 166 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
lib/Transforms/Utils/CloneModule.cpp
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@@ -89,8 +89,7 @@ Module *llvm::CloneModule(const Module *M,
GlobalVariable *GV = cast<GlobalVariable>(VMap[I]);
if (I->hasInitializer())
GV->setInitializer(cast<Constant>(MapValue(I->getInitializer(),
VMap,
true)));
VMap, RF_None)));
GV->setLinkage(I->getLinkage());
GV->setThreadLocal(I->isThreadLocal());
GV->setConstant(I->isConstant());
@@ -121,7 +120,7 @@ Module *llvm::CloneModule(const Module *M,
GlobalAlias *GA = cast<GlobalAlias>(VMap[I]);
GA->setLinkage(I->getLinkage());
if (const Constant* C = I->getAliasee())
GA->setAliasee(cast<Constant>(MapValue(C, VMap, true)));
GA->setAliasee(cast<Constant>(MapValue(C, VMap, RF_None)));
}
// And named metadata....
@@ -130,7 +129,8 @@ Module *llvm::CloneModule(const Module *M,
const NamedMDNode &NMD = *I;
NamedMDNode *NewNMD = New->getOrInsertNamedMetadata(NMD.getName());
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i)
NewNMD->addOperand(cast<MDNode>(MapValue(NMD.getOperand(i), VMap, true)));
NewNMD->addOperand(cast<MDNode>(MapValue(NMD.getOperand(i), VMap,
RF_None)));
}
return New;