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Move onlyUsedByLifetimeMarkers to ValueTracking so that it can be used by other

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passes as well.

llvm-svn: 133904
This commit is contained in:
Nick Lewycky 2011-06-27 04:20:45 +00:00
parent 80238b93fb
commit 4a0f5218f2
3 changed files with 21 additions and 16 deletions
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4
include/llvm/Analysis/ValueTracking.h
View File

@ -158,6 +158,10 @@ namespace llvm {
return GetUnderlyingObject(const_cast<Value *>(V), TD, MaxLookup);
}
/// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
/// are lifetime markers.
bool onlyUsedByLifetimeMarkers(const Value *V);
} // end namespace llvm
#endif

16
lib/Analysis/ValueTracking.cpp
View File

@ -1783,3 +1783,19 @@ llvm::GetUnderlyingObject(Value *V, const TargetData *TD, unsigned MaxLookup) {
}
return V;
}
/// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
/// are lifetime markers.
///
bool llvm::onlyUsedByLifetimeMarkers(const Value *V) {
for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
UI != UE; ++UI) {
const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI);
if (!II) return false;
if (II->getIntrinsicID() != Intrinsic::lifetime_start &&
II->getIntrinsicID() != Intrinsic::lifetime_end)
return false;
}
return true;
}

17
lib/Transforms/Utils/PromoteMemoryToRegister.cpp
View File

@ -38,6 +38,7 @@
#include "llvm/Analysis/DIBuilder.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/InstructionSimplify.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
@ -73,22 +74,6 @@ struct DenseMapInfo<std::pair<BasicBlock*, unsigned> > {
};
}
/// onlyUsedByLifetimeMarkers - Return true if the only users of this pointer
/// are lifetime markers.
///
static bool onlyUsedByLifetimeMarkers(const Value *V) {
for (Value::const_use_iterator UI = V->use_begin(), UE = V->use_end();
UI != UE; ++UI) {
const IntrinsicInst *II = dyn_cast<IntrinsicInst>(*UI);
if (!II) return false;
if (II->getIntrinsicID() != Intrinsic::lifetime_start &&
II->getIntrinsicID() != Intrinsic::lifetime_end)
return false;
}
return true;
}
/// isAllocaPromotable - Return true if this alloca is legal for promotion.
/// This is true if there are only loads and stores to the alloca.
///