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| author | Michael Matz <matz@suse.de> | 2006-01-30 17:35:37 +0000 |
|---|---|---|
| committer | Michael Matz <matz@gcc.gnu.org> | 2006-01-30 17:35:37 +0000 |
| commit | b39f98f94d48be5ff106436b5ddc289e77e9d7e5 (patch) | |
| tree | 971179931822874f9d854efac2ef87a4f28e83f5 /gcc/global.c | |
| parent | 3b1a6677a716307298abb22c2c0b191b69e5903e (diff) | |
| download | gcc-b39f98f94d48be5ff106436b5ddc289e77e9d7e5.zip gcc-b39f98f94d48be5ff106436b5ddc289e77e9d7e5.tar.gz gcc-b39f98f94d48be5ff106436b5ddc289e77e9d7e5.tar.bz2 | |
global.c (find_reg): Only evict for global regs.
* global.c (find_reg): Only evict for global regs.
Take n_refs into account and dump more info.
From-SVN: r110407
Diffstat (limited to 'gcc/global.c')
| -rw-r--r-- | gcc/global.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/gcc/global.c b/gcc/global.c index 2186388..61fd9f7 100644 --- a/gcc/global.c +++ b/gcc/global.c @@ -1241,7 +1241,8 @@ find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbere so we can use it instead. */ if (best_reg < 0 && !retrying /* Let's not bother with multi-reg allocnos. */ - && allocno[num].size == 1) + && allocno[num].size == 1 + && REG_BASIC_BLOCK (allocno[num].reg) == REG_BLOCK_GLOBAL) { /* Count from the end, to find the least-used ones first. */ for (i = FIRST_PSEUDO_REGISTER - 1; i >= 0; i--) @@ -1278,9 +1279,9 @@ find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbere variables so as to avoid excess precision problems that occur on an i386-unknown-sysv4.2 (unixware) host. */ - double tmp1 = ((double) local_reg_freq[regno] + double tmp1 = ((double) local_reg_freq[regno] * local_reg_n_refs[regno] / local_reg_live_length[regno]); - double tmp2 = ((double) allocno[num].freq + double tmp2 = ((double) allocno[num].freq * allocno[num].n_refs / allocno[num].live_length); if (tmp1 < tmp2) @@ -1288,6 +1289,19 @@ find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbere /* Hard reg REGNO was used less in total by local regs than it would be used by this one allocno! */ int k; + if (dump_file) + { + fprintf (dump_file, "Regno %d better for global %d, ", + regno, allocno[num].reg); + fprintf (dump_file, "fr:%d, ll:%d, nr:%d ", + allocno[num].freq, allocno[num].live_length, + allocno[num].n_refs); + fprintf (dump_file, "(was: fr:%d, ll:%d, nr:%d)\n", + local_reg_freq[regno], + local_reg_live_length[regno], + local_reg_n_refs[regno]); + } + for (k = 0; k < max_regno; k++) if (reg_renumber[k] >= 0) { @@ -1296,7 +1310,12 @@ find_reg (int num, HARD_REG_SET losers, int alt_regs_p, int accept_call_clobbere = r + hard_regno_nregs[r][PSEUDO_REGNO_MODE (k)]; if (regno >= r && regno < endregno) - reg_renumber[k] = -1; + { + if (dump_file) + fprintf (dump_file, + "Local Reg %d now on stack\n", k); + reg_renumber[k] = -1; + } } best_reg = regno; |