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riscv-gcc-1
Commit 6680889f by Richard Kenner
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(qty_compare{,_1}): Give multi-word regs higher priority, as stated in 

the comments.

From-SVN: r6649
parent 0a5152d0
Showing with 10 additions and 8 deletions
gcc/local-alloc.c
......@@ -1503,12 +1503,12 @@ qty_compare (q1, q2)
times a register can occur in one insn (surely less than 100).
Multiplying this by 10000 can't overflow. */
register int pri1
= (((double) (floor_log2 (qty_n_refs[q1]) * qty_n_refs[q1])
/ ((qty_death[q1] - qty_birth[q1]) * qty_size[q1]))
= (((double) (floor_log2 (qty_n_refs[q1]) * qty_n_refs[q1] * qty_size[q1])
/ (qty_death[q1] - qty_birth[q1]))
* 10000);
register int pri2
= (((double) (floor_log2 (qty_n_refs[q2]) * qty_n_refs[q2])
/ ((qty_death[q2] - qty_birth[q2]) * qty_size[q2]))
= (((double) (floor_log2 (qty_n_refs[q2]) * qty_n_refs[q2] * qty_size[q2])
/ (qty_death[q2] - qty_birth[q2]))
* 10000);
return pri2 - pri1;
}
......@@ -1524,12 +1524,14 @@ qty_compare_1 (q1, q2)
times a register can occur in one insn (surely less than 100).
Multiplying this by 10000 can't overflow. */
register int pri1
= (((double) (floor_log2 (qty_n_refs[*q1]) * qty_n_refs[*q1])
/ ((qty_death[*q1] - qty_birth[*q1]) * qty_size[*q1]))
= (((double) (floor_log2 (qty_n_refs[*q1]) * qty_n_refs[*q1]
* qty_size[*q1])
/ (qty_death[*q1] - qty_birth[*q1]))
* 10000);
register int pri2
= (((double) (floor_log2 (qty_n_refs[*q2]) * qty_n_refs[*q2])
/ ((qty_death[*q2] - qty_birth[*q2]) * qty_size[*q2]))
= (((double) (floor_log2 (qty_n_refs[*q2]) * qty_n_refs[*q2]
* qty_size[*q2])
/ (qty_death[*q2] - qty_birth[*q2]))
* 10000);
tem = pri2 - pri1;
......
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