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AA metadata refactoring (introduce AAMDNodes)

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In order to enable the preservation of noalias function parameter information
after inlining, and the representation of block-level __restrict__ pointer
information (etc.), additional kinds of aliasing metadata will be introduced.
This metadata needs to be carried around in AliasAnalysis::Location objects
(and MMOs at the SDAG level), and so we need to generalize the current scheme
(which is hard-coded to just one TBAA MDNode*).

This commit introduces only the necessary refactoring to allow for the
introduction of other aliasing metadata types, but does not actually introduce
any (that will come in a follow-up commit). What it does introduce is a new
AAMDNodes structure to hold all of the aliasing metadata nodes associated with
a particular memory-accessing instruction, and uses that structure instead of
the raw MDNode* in AliasAnalysis::Location, etc.

No functionality change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213859 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel
2014-07-24 12:16:19 +00:00
parent a4abc43a56
commit 2c7c54c86c
50 changed files with 521 additions and 389 deletions
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8
lib/Transforms/Vectorize/LoopVectorize.cpp
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@ -3937,7 +3937,7 @@ public:
/// \brief Register a load and whether it is only read from.
void addLoad(AliasAnalysis::Location &Loc, bool IsReadOnly) {
Value *Ptr = const_cast<Value*>(Loc.Ptr);
AST.add(Ptr, AliasAnalysis::UnknownSize, Loc.TBAATag);
AST.add(Ptr, AliasAnalysis::UnknownSize, Loc.AATags);
Accesses.insert(MemAccessInfo(Ptr, false));
if (IsReadOnly)
ReadOnlyPtr.insert(Ptr);
@ -3946,7 +3946,7 @@ public:
/// \brief Register a store.
void addStore(AliasAnalysis::Location &Loc) {
Value *Ptr = const_cast<Value*>(Loc.Ptr);
AST.add(Ptr, AliasAnalysis::UnknownSize, Loc.TBAATag);
AST.add(Ptr, AliasAnalysis::UnknownSize, Loc.AATags);
Accesses.insert(MemAccessInfo(Ptr, true));
}
@ -4737,7 +4737,7 @@ bool LoopVectorizationLegality::canVectorizeMemory() {
// condition, so we cannot rely on it when determining whether or not we
// need runtime pointer checks.
if (blockNeedsPredication(ST->getParent()))
Loc.TBAATag = nullptr;
Loc.AATags.TBAA = nullptr;
Accesses.addStore(Loc);
}
@ -4772,7 +4772,7 @@ bool LoopVectorizationLegality::canVectorizeMemory() {
// condition, so we cannot rely on it when determining whether or not we
// need runtime pointer checks.
if (blockNeedsPredication(LD->getParent()))
Loc.TBAATag = nullptr;
Loc.AATags.TBAA = nullptr;
Accesses.addLoad(Loc, IsReadOnlyPtr);
}