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[Bug tree-optimization/56501] New: gcc 4.6 ICE on noreturn function at -Os and above
- From: "dhazeghi at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 01 Mar 2013 18:50:15 +0000
- Subject: [Bug tree-optimization/56501] New: gcc 4.6 ICE on noreturn function at -Os and above
- Auto-submitted: auto-generated
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56501
Bug #: 56501
Summary: gcc 4.6 ICE on noreturn function at -Os and above
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: tree-optimization
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: dhazeghi@yahoo.com
The following testcase (derived from gzip) triggers an internal compiler error
with gcc 4.6, 4.5 and 4.4 when compiled at -Os or higher on x86_64-linux. The
problem does not occur with 4.7 or newer, or with 4.3 or older.
$ gcc-4.6 --version
gcc-4.6 (GCC) 4.6.3
$ gcc-4.6 -O1 -w small.c
$ gcc-4.6 -Os -w small.c
small.c: In function âmainâ:
small.c:24:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
$ cat small.c
int a;
void try_help () __attribute__ ((__noreturn__));
void try_help ()
{
}
int main ()
{
switch (a)
{
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
break;
default:
try_help ();
}
}