[Bug bootstrap/26361] [4.2 regression] bootstrap failure on Alpha: xgcc runs out of memory compiling libiberty/md5.c

roger at eyesopen dot com gcc-bugzilla@gcc.gnu.org
Mon Feb 20 03:52:00 GMT 2006



------- Comment #11 from roger at eyesopen dot com  2006-02-20 03:52 -------
Hmmm.  Looks like the problem is in .088t.vrp2....

We have
unsigned int D.1981;
unsigned int D.1982;
D.1982_9 = -D.1981_1;

D.1981_1: [0, +INF]  EQUIVALENCES: { } (0 elements)
D.1982_9: [0, 1]  EQUIVALENCES: { } (0 elements)

Seems like a bug in the interval arithmetic of NEGATE_EXPR for unsigned types.
- [0, (unsigned)-1] seems to be converted to [0, 1]!!?  I hope this helps.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26361



More information about the Gcc-bugs mailing list