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[Bug rtl-optimization/29798] [4.3 Regression] -O2 gives wrong results
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Nov 2006 11:02:08 -0000
- Subject: [Bug rtl-optimization/29798] [4.3 Regression] -O2 gives wrong results
- References: <bug-29798-11807@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from bonzini at gnu dot org 2006-11-13 11:02 -------
reduced testcase:
#include <stdlib.h>
int
main ()
{
int i;
double oldrho;
double beta = 0.0;
double work = 1.0;
for (i = 1; i <= 2; i++)
{
double rho = work * work;
if (i != 1)
beta = rho / oldrho;
if (beta == 1.0)
abort ();
work /= 2.0;
oldrho = rho;
}
return 0;
}
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29798