[Bug tree-optimization/27394] New: double -> char conversion varies with optimization level
amylaar at gcc dot gnu dot org
gcc-bugzilla@gcc.gnu.org
Tue May 2 17:14:00 GMT 2006
This testcase:
int
f
()
{
double d = 128.;
return (signed char) d;
}
int
main ()
{
return f () != -128;
}
Succeeds at -O0 and fails at -O1. While the C standard says that the result
of the conversion is unspecified, it is a quality of implementation issue to
give, where reasonably possible, the same results when optimizing as when
not optimizing. Doing otherwise makes debugging unnecessarily difficult.
--
Summary: double -> char conversion varies with optimization level
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: amylaar at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27394
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