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| author | Jan Hubicka <jh@suse.cz> | 2001-07-30 22:03:37 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2001-07-30 20:03:37 +0000 |
| commit | a08b260482d8972aaaa3eb2a0175f9cc175dbad9 (patch) | |
| tree | aa952727c06ed38ed797f094dd095bd14f5da5f4 /gcc/global.c | |
| parent | e5b3941e7e73831e7adecf066ee08461254eaadd (diff) | |
| download | gcc-a08b260482d8972aaaa3eb2a0175f9cc175dbad9.zip gcc-a08b260482d8972aaaa3eb2a0175f9cc175dbad9.tar.gz gcc-a08b260482d8972aaaa3eb2a0175f9cc175dbad9.tar.bz2 | |
flow.c (mark_set_1): Use REG_FREQ_FROM_BB.
* flow.c (mark_set_1): Use REG_FREQ_FROM_BB.
(attempt_auto_inc): LIkewise.
(mark_used_reg): Likewise.
(try_pre_increment_1): Likewise.
* regclass.c (regclass): Likewise.
* global.c (allocno_compare): Update comment; change scaling factor.
* local-alloc.c (QTY_CMP_PRI): Likewise.
* regs.h (REG_FREQ_FROM_BB): New.
(REG_FREQ_MAX): Likewise.
From-SVN: r44483
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; |