diff options
Diffstat (limited to 'gcc/local-alloc.c')
| -rw-r--r-- | gcc/local-alloc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c index 4424074..a068db8 100644 --- a/gcc/local-alloc.c +++ b/gcc/local-alloc.c @@ -1698,13 +1698,14 @@ block_alloc (b) /* 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 frequency (max REG_FREQ_MAX). + Multiplying this by 10000/REG_FREQ_MAX can't overflow. QTY_CMP_PRI is also used by qty_sugg_compare. */ #define QTY_CMP_PRI(q) \ ((int) (((double) (floor_log2 (qty[q].n_refs) * qty[q].freq * qty[q].size) \ - / (qty[q].death - qty[q].birth)) * 10000)) + / (qty[q].death - qty[q].birth)) * (10000 / REG_FREQ_MAX))) static int qty_compare (q1, q2) |