6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-12 02:33:33 +00:00
Code Issues Projects Releases Wiki Activity

Eliminate new[0], just set Bits to NULL.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34311 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2007-02-15 18:59:15 +00:00
parent 924b1ca9ee
commit 5f92ce4696
1 changed files with 20 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
include/llvm/ADT/BitVector.h
View File

@ -69,7 +69,7 @@ public:
/// BitVector default ctor - Creates an empty bitvector.
BitVector() : Size(0), Capacity(0) {
Bits = new BitWord[0];
Bits = NULL;
}
/// BitVector ctor - Creates a bitvector of specified number of bits. All
@ -154,9 +154,11 @@ public:
/// clear - Clear all bits.
void clear() {
delete[] Bits;
Bits = new BitWord[0];
Size = Capacity = 0;
if (Capacity > 0) {
delete[] Bits;
Bits = NULL;
Size = Capacity = 0;
}
}
/// resize - Grow or shrink the bitvector.
@ -186,8 +188,10 @@ public:
// Set, reset, flip
BitVector &set() {
init_words(Bits, Capacity, true);
clear_unused_bits();
if (Bits) {
init_words(Bits, Capacity, true);
clear_unused_bits();
}
return *this;
}
@ -197,7 +201,8 @@ public:
}
BitVector &reset() {
init_words(Bits, Capacity, false);
if (Bits)
init_words(Bits, Capacity, false);
return *this;
}
@ -303,8 +308,10 @@ private:
// Clear the unused top bits in the high word.
void clear_unused_bits() {
unsigned ExtraBits = Size % BITS_PER_WORD;
Bits[Size / BITS_PER_WORD] &= ~(~0 << ExtraBits);
if (Size) {
unsigned ExtraBits = Size % BITS_PER_WORD;
Bits[Size / BITS_PER_WORD] &= ~(~0 << ExtraBits);
}
}
void grow(unsigned NewSize) {
@ -317,12 +324,14 @@ private:
std::copy(Bits, &Bits[OldCapacity], NewBits);
// Destroy the old bits.
delete[] Bits;
if (Bits)
delete[] Bits;
Bits = NewBits;
}
void init_words(BitWord *B, unsigned NumWords, bool t) {
memset(B, 0 - (int)t, NumWords*sizeof(BitWord));
if (B)
memset(B, 0 - (int)t, NumWords*sizeof(BitWord));
}
};