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Fix a self-memcpy which only breaks under Valgrind's memcpy 

implementation. Silliness, but it'll be a trivial performance
optimization. This should clear up a failure on the vg_leak bot.

llvm-svn: 195704
This commit is contained in:
Chandler Carruth 2013-11-26 00:44:36 +00:00
parent 30f5336ba8
commit 2664317b66
1 changed files with 3 additions and 0 deletions
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3
llvm/lib/Support/SmallPtrSet.cpp
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@ -218,6 +218,9 @@ SmallPtrSetImpl::SmallPtrSetImpl(const void **SmallStorage, unsigned SmallSize,
/// CopyFrom - implement operator= from a smallptrset that has the same pointer /// CopyFrom - implement operator= from a smallptrset that has the same pointer
/// type, but may have a different small size. /// type, but may have a different small size.
void SmallPtrSetImpl::CopyFrom(const SmallPtrSetImpl &RHS) { void SmallPtrSetImpl::CopyFrom(const SmallPtrSetImpl &RHS) {
if (&RHS == this)
return;
if (isSmall() && RHS.isSmall()) if (isSmall() && RHS.isSmall())
assert(CurArraySize == RHS.CurArraySize && assert(CurArraySize == RHS.CurArraySize &&
"Cannot assign sets with different small sizes"); "Cannot assign sets with different small sizes");