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* [Bug rtl-optimization/17861] New: loop optimizer generates wrong code
@ 2004-10-06 13:05 rguenth at tat dot physik dot uni-tuebingen dot de
2004-10-06 13:06 ` [Bug rtl-optimization/17861] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: rguenth at tat dot physik dot uni-tuebingen dot de @ 2004-10-06 13:05 UTC (permalink / raw)
To: gcc-bugs
extern void abort();
int foo=100;
inline int f ()
{
foo = 0;
}
void main ()
{
int i;
for (i = 0; i < foo; i++)
f ();
if (i != 1)
abort();
}
generates wrong code with 2.95.x through 3.4.x (but fixed / worked around on
mainline) with -O2. Maybe someone can trigger the failure on mainline by
disabling the right tree-optimization.
See http://gcc.gnu.org/ml/gcc/2004-10/msg00172.html and followups.
--
Summary: loop optimizer generates wrong code
Product: gcc
Version: 3.4.3
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: rtl-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rguenth at tat dot physik dot uni-tuebingen dot de
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17861
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2004-10-06 13:05 [Bug rtl-optimization/17861] New: loop optimizer generates wrong code rguenth at tat dot physik dot uni-tuebingen dot de
2004-10-06 13:06 ` [Bug rtl-optimization/17861] " pinskia at gcc dot gnu dot org
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