Hello, members of GCC development team!
I am involved in support of customers who use GCC.
Recently a customer has complaint that gcc-4.1.2
generates an infinite loop for the following program:
#include stdio.h
extern void f (int);
int main ()
{
char e = 0;
do
{
printf
Hi,
please use gcc-help@ for this type of questions.
On Tue, 29 Nov 2011, Nadezhda Ivanоvna Vyukova wrote:
I've explained the customer that by default char is treated
as signed char on our platform and therefore this program
does not conform ISO C90, as it causes the integer overflow
On 11/29/2011 8:29 AM, Michael Matz wrote:
IMHO it would be better to issue a warning when a finite loop is
transformed to an infinite one (as a result of -ftree-vrp).
-Wstrict-overflow gives a warning in this program. This warning isn't
active by default. 4.1 didn't yet have this warning
Nadezhda Ivanоvna Vyukova n...@niisi.msk.ru writes:
I am involved in support of customers who use GCC.
Recently a customer has complaint that gcc-4.1.2
generates an infinite loop for the following program:
#include stdio.h
extern void f (int);
int main ()
{
char e = 0;
do
On 29/11/2011 15:25, Ian Lance Taylor wrote:
Nadezhda Ivanоvna Vyukovan...@niisi.msk.ru writes:
I am involved in support of customers who use GCC.
Recently a customer has complaint that gcc-4.1.2
generates an infinite loop for the following program:
#includestdio.h
extern void f (int);
Hi,
On Tue, 29 Nov 2011, Robert Dewar wrote:
IMHO it would be better to issue a warning when a finite loop is
transformed to an infinite one (as a result of -ftree-vrp).
-Wstrict-overflow gives a warning in this program. This warning isn't
active by default. 4.1 didn't yet have
On Tue, 29 Nov 2011, Nadezhda Ivan?vna Vyukova wrote:
I've explained the customer that by default char is treated
as signed char on our platform and therefore this program
does not conform ISO C90, as it causes the integer overflow
(undefined behavior). But he was not satisfied.
Actually
On 29/11/11 16:44, Joseph S. Myers wrote:
On Tue, 29 Nov 2011, Nadezhda Ivan�vna Vyukova wrote:
I've explained the customer that by default char is treated
as signed char on our platform and therefore this program
does not conform ISO C90, as it causes the integer overflow
(undefined
On Tue, 29 Nov 2011, David Brown wrote:
On 29/11/11 16:44, Joseph S. Myers wrote:
converting the int to char (which GCC defines as modulo) applies. See PR
35634 which has various discussion of possible approaches for fixing
this, and patches that introduce vectorizer optimization
