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Add capability to represent volatile AliasSet's
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10456 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -82,7 +82,7 @@ class AliasSet {
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// RefCount - Number of nodes pointing to this AliasSet plus the number of
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// AliasSets forwarding to it.
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unsigned RefCount : 29;
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unsigned RefCount : 28;
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/// AccessType - Keep track of whether this alias set merely refers to the
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/// locations of memory, whether it modifies the memory, or whether it does
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@ -103,6 +103,9 @@ class AliasSet {
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};
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unsigned AliasTy : 1;
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// Volatile - True if this alias set contains volatile loads or stores.
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bool Volatile : 1;
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friend class ilist_traits<AliasSet>;
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AliasSet *getPrev() const { return Prev; }
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AliasSet *getNext() const { return Next; }
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@ -116,6 +119,11 @@ public:
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bool isMustAlias() const { return AliasTy == MustAlias; }
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bool isMayAlias() const { return AliasTy == MayAlias; }
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// isVolatile - Return true if this alias set contains volatile loads or
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// stores.
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bool isVolatile() const { return Volatile; }
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/// isForwardingAliasSet - Return true if this alias set should be ignored as
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/// part of the AliasSetTracker object.
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bool isForwardingAliasSet() const { return Forward; }
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@ -168,7 +176,7 @@ public:
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private:
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// Can only be created by AliasSetTracker
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AliasSet() : PtrListHead(0), PtrListTail(0), Forward(0), RefCount(0),
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AccessTy(NoModRef), AliasTy(MustAlias) {
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AccessTy(NoModRef), AliasTy(MustAlias), Volatile(false) {
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}
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HashNodePair *getSomePointer() const {
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return PtrListHead ? PtrListHead : 0;
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@ -194,6 +202,7 @@ private:
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void addPointer(AliasSetTracker &AST, HashNodePair &Entry, unsigned Size);
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void addCallSite(CallSite CS);
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void setVolatile() { Volatile = true; }
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/// aliasesPointer - Return true if the specified pointer "may" (or must)
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/// alias one of the members in the set.
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@ -272,9 +281,10 @@ private:
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AliasSet::PointerRec())).first;
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}
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void addPointer(Value *P, unsigned Size, AliasSet::AccessType E) {
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AliasSet &addPointer(Value *P, unsigned Size, AliasSet::AccessType E) {
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AliasSet &AS = getAliasSetForPointer(P, Size);
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AS.AccessTy |= E;
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return AS;
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}
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AliasSet *findAliasSetForPointer(const Value *Ptr, unsigned Size);
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