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Teach ScalarEvolution about GlobalAliases. 

llvm-svn: 80014
This commit is contained in:
Dan Gohman 2009-08-25 17:49:57 +00:00
parent 896ef2be35
commit f161e06e78
1 changed files with 3 additions and 0 deletions
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3
llvm/lib/Analysis/ScalarEvolution.cpp
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@ -63,6 +63,7 @@
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/GlobalAlias.h"
#include "llvm/Instructions.h"
#include "llvm/LLVMContext.h"
#include "llvm/Operator.h"
@ -2906,6 +2907,8 @@ const SCEV *ScalarEvolution::createSCEV(Value *V) {
return getIntegerSCEV(0, V->getType());
else if (isa<UndefValue>(V))
return getIntegerSCEV(0, V->getType());
else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(V))
return GA->mayBeOverridden() ? getUnknown(V) : getSCEV(GA->getAliasee());
else
return getUnknown(V);