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Avoid divisions. 

Compiler doesn't know the fact that Config->WordSize * 8 is always a
power of two, so it had to use the div instruction to divide some
number with C.

llvm-svn: 323014
This commit is contained in:
Rui Ueyama 2018-01-20 00:14:16 +00:00
parent 6f10bd21f0
commit 2f8af79927
1 changed files with 1 additions and 1 deletions
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lld/ELF/SyntheticSections.cpp
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@ -1743,7 +1743,7 @@ void GnuHashTableSection::writeTo(uint8_t *Buf) {
// [1] Ulrich Drepper (2011), "How To Write Shared Libraries" (Ver. 4.1.2),
// p.9, https://www.akkadia.org/drepper/dsohowto.pdf
void GnuHashTableSection::writeBloomFilter(uint8_t *Buf) {
const unsigned C = Config->Wordsize * 8;
unsigned C = Config->Is64 ? 64 : 32;
for (const Entry &Sym : Symbols) {
size_t I = (Sym.Hash / C) & (MaskWords - 1);
uint64_t Val = readUint(Buf + I * Config->Wordsize);