Hello,
On the FreeBSD -CURRENT mailing lists a user of the upcoming FreeBSD release
discovered a bug in the GCC that is shipped with the base system (4.2.0
20070514). This bug causes the amount of iterations in a loop to be limited to
the range of an array used in a single part of the loop. When the size of the
loop is increased (in the attached example, to 6 or higher) the problem
disappears.
The issue is solved when compiling the application with -O1 or lower.
--
Summary: Loop optimization limits range to size of array used
inside loop
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: ed at fxq dot nl
GCC build triplet: amd64-undermydesk-freebsd
GCC host triplet: amd64-undermydesk-freebsd
GCC target triplet: amd64-undermydesk-freebsd
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32500
