On 12/05/12 12:13, Aldy Hernandez wrote:
This is a division by zero ICE.
In the testcase in the PR, both `n' and `lra_live_max_point' are zero. I
have opted to inhibit the dump when lra_live_max_point is zero, but I
can just as easily avoiding printing the percentage in this case.
Let me know what you prefer.
OK for trunk?
Errr, another ChangeLog oops. Cut and paste error fixed. Sorry.
commit fcb644db593ee78855a0fac1a76f11478a359d1d
Author: Aldy Hernandez <al...@redhat.com>
Date: Wed Dec 5 12:06:01 2012 -0600
PR rtl-optimization/55604
* lra-lives.c (remove_some_program_points_and_update_live_ranges):
Avoiding division by zero when dumping live range compression.
diff --git a/gcc/lra-lives.c b/gcc/lra-lives.c
index c79b95b..46146ca 100644
--- a/gcc/lra-lives.c
+++ b/gcc/lra-lives.c
@@ -811,7 +811,7 @@ remove_some_program_points_and_update_live_ranges (void)
sbitmap_free (born);
sbitmap_free (dead);
n++;
- if (lra_dump_file != NULL)
+ if (lra_dump_file != NULL && lra_live_max_point)
fprintf (lra_dump_file, "Compressing live ranges: from %d to %d - %d%%\n",
lra_live_max_point, n, 100 * n / lra_live_max_point);
if (n < lra_live_max_point)
