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Provide move semantics for TinyPtrVector and for DenseMap's rehash function.

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This makes DenseMap<..., TinyPtrVector<...>> as cheap as it always should've been!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157113 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-05-19 13:28:54 +00:00
parent f4c261b137
commit ac5802bca0
2 changed files with 13 additions and 2 deletions
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5
include/llvm/ADT/DenseMap.h
View File

@ -14,6 +14,7 @@
#ifndef LLVM_ADT_DENSEMAP_H
#define LLVM_ADT_DENSEMAP_H
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/PointerLikeTypeTraits.h"
#include "llvm/Support/type_traits.h"
@ -438,8 +439,8 @@ private:
bool FoundVal = LookupBucketFor(B->first, DestBucket);
(void)FoundVal; // silence warning.
assert(!FoundVal && "Key already in new map?");
DestBucket->first = B->first;
new (&DestBucket->second) ValueT(B->second);
DestBucket->first = llvm_move(B->first);
new (&DestBucket->second) ValueT(llvm_move(B->second));
// Free the value.
B->second.~ValueT();

10
include/llvm/ADT/TinyPtrVector.h
View File

@ -10,8 +10,10 @@
#ifndef LLVM_ADT_TINYPTRVECTOR_H
#define LLVM_ADT_TINYPTRVECTOR_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/PointerUnion.h"
#include "llvm/Support/Compiler.h"
namespace llvm {
@ -32,6 +34,11 @@ public:
if (VecTy *V = Val.template dyn_cast<VecTy*>())
Val = new VecTy(*V);
}
#if LLVM_USE_RVALUE_REFERENCES
TinyPtrVector(TinyPtrVector &&RHS) : Val(RHS.Val) {
RHS.Val = (EltTy)0;
}
#endif
~TinyPtrVector() {
if (VecTy *V = Val.template dyn_cast<VecTy*>())
delete V;
@ -159,6 +166,9 @@ public:
private:
void operator=(const TinyPtrVector&); // NOT IMPLEMENTED YET.
#if LLVM_USE_RVALUE_REFERENCES
void operator=(TinyPtrVector&&); // NOT IMPLEMENTED YET.
#endif
};
} // end namespace llvm