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Issue #14180: Fix an invalid rounding when compiler optimization are enabled

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Use volatile keyword to disable localy unsafe float optimizations.
This commit is contained in:
Victor Stinner 2012-03-13 19:12:23 +01:00
parent 87adda502a
commit bd273c1ec3
1 changed files with 3 additions and 1 deletions
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4
Python/pytime.c
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@ -102,7 +102,9 @@ _PyTime_ObjectToDenominator(PyObject *obj, time_t *sec, long *numerator,
{
assert(denominator <= LONG_MAX);
if (PyFloat_Check(obj)) {
double d, intpart, floatpart, err;
double d, intpart, err;
/* volatile avoids unsafe optimization on float enabled by gcc -O3 */
volatile double floatpart;
d = PyFloat_AsDouble(obj);
floatpart = modf(d, &intpart);