diff options
Diffstat (limited to 'gcc/global.c')
| -rw-r--r-- | gcc/global.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/gcc/global.c b/gcc/global.c index f03de63..6558fac 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -611,16 +611,17 @@ allocno_compare (v1p, v2p) int v1 = *(const int *)v1p, v2 = *(const int *)v2p; /* Note that the quotient will never be bigger than the value of floor_log2 times the maximum number of - times a register can occur in one insn (surely less than 100). - Multiplying this by 10000 can't overflow. */ + times a register can occur in one insn (surely less than 100) + weighted by the frequency (maximally REG_FREQ_MAX). + Multiplying this by 10000/REG_FREQ_MAX can't overflow. */ register int pri1 = (((double) (floor_log2 (allocno[v1].n_refs) * allocno[v1].freq) / allocno[v1].live_length) - * 10000 * allocno[v1].size); + * (10000 / REG_FREQ_MAX) * allocno[v1].size); register int pri2 = (((double) (floor_log2 (allocno[v2].n_refs) * allocno[v2].freq) / allocno[v2].live_length) - * 10000 * allocno[v2].size); + * (10000 / REG_FREQ_MAX) * allocno[v2].size); if (pri2 - pri1) return pri2 - pri1; |