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Re: optimization/3809: gcc-3.0 (release): array subscripting error (-1) in loop_p() in alias.c
- From: rth at gcc dot gnu dot org
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, jseward at acm dot org, nobody at gcc dot gnu dot org, v-julsew at microsoft dot com
- Date: 2 Apr 2002 11:00:25 -0000
- Subject: Re: optimization/3809: gcc-3.0 (release): array subscripting error (-1) in loop_p() in alias.c
- Reply-to: rth at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, jseward at acm dot org, nobody at gcc dot gnu dot org, v-julsew at microsoft dot com, gcc-gnats at gcc dot gnu dot org
Synopsis: gcc-3.0 (release): array subscripting error (-1) in loop_p() in alias.c
State-Changed-From-To: open->closed
State-Changed-By: rth
State-Changed-When: Tue Apr 2 03:00:24 2002
State-Changed-Why:
Actually, the condition described can never happen legitimately;
Index -1 is ENTRY_BLOCK, which would indicate that there is
an edge from entry to exit that flows through no block, which
is illegal. So the bug is whereever created such a CFG.
That said, all this has been completely rewritten for gcc 3.1.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=3809