Fix an off by 1 bug that prevented SmallPtrSet from using all of its 'small' capacity. Then fix the early return in the move constructor that prevented 'small' moves from clearing the NumElements in the moved from object. The directed test missed this because it was always testing large moves due to the off by 1 bug.
llvm-svn: 216044
diff --git a/llvm/lib/Support/SmallPtrSet.cpp b/llvm/lib/Support/SmallPtrSet.cpp
index a80e095..621b90f 100644
--- a/llvm/lib/Support/SmallPtrSet.cpp
+++ b/llvm/lib/Support/SmallPtrSet.cpp
@@ -43,7 +43,7 @@
return false;
// Nope, there isn't. If we stay small, just 'pushback' now.
- if (NumElements < CurArraySize-1) {
+ if (NumElements < CurArraySize) {
SmallArray[NumElements++] = Ptr;
return true;
}
@@ -200,13 +200,12 @@
if (that.isSmall()) {
CurArray = SmallArray;
memcpy(CurArray, that.CurArray, sizeof(void *) * CurArraySize);
- return;
+ } else {
+ // Otherwise, we steal the large memory allocation and no copy is needed.
+ CurArray = that.CurArray;
+ that.CurArray = that.SmallArray;
}
- // Otherwise, we steal the large memory allocation and no copy is needed.
- CurArray = that.CurArray;
- that.CurArray = that.SmallArray;
-
// Make the "that" object small and empty.
that.CurArraySize = SmallSize;
assert(that.CurArray == that.SmallArray);