http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56486
Bug #: 56486
Summary: infinite loop in cc1 at -O1 and above
Classification: Unclassified
Product: gcc
Version: 4.7.2
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: dhaze...@yahoo.com
The following code (generated by csmith) causes gcc 4.6.3 and 4.7.2 to go into
an infinite loop when compiled at -O1 or higher. This does not occur with
current trunk or gcc 4.5.4 (although 4.5.4 does take about 10 seconds to
compile it), so technically this is a regression on 4.6 and 4.7.
An attempt to use creduce to reduce it failed as end-result no longer hangs (it
does take 10 seconds to compile though).
$ gcc-4.7 --version
gcc-4.7 (GCC) 4.7.2
$ gcc-4.5 -O1 crash.i
$ gcc-trunk -O1 crash.i
$ gcc-4.7 -O1 crash.i
<hangs>
