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Remove two popcount patterns which we are already able to recognize.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170158 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shuxin Yang 2012-12-13 23:16:19 +00:00
parent 9ad73e93a5
commit 200e2370dc
1 changed files with 0 additions and 15 deletions
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15
lib/Target/README.txt
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@ -262,22 +262,7 @@ unsigned countbits_slow(unsigned v) {
c += v & 1; c += v & 1;
return c; return c;
} }
unsigned countbits_fast(unsigned v){
unsigned c;
for (c = 0; v; c++)
v &= v - 1; // clear the least significant bit set
return c;
}
BITBOARD = unsigned long long
int PopCnt(register BITBOARD a) {
register int c=0;
while(a) {
c++;
a &= a - 1;
}
return c;
}
unsigned int popcount(unsigned int input) { unsigned int popcount(unsigned int input) {
unsigned int count = 0; unsigned int count = 0;
for (unsigned int i = 0; i < 4 * 8; i++) for (unsigned int i = 0; i < 4 * 8; i++)