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* [Bug c/68007] New: False warning for integer overflow for unsigned integers
@ 2015-10-17 21:06 r.f.vannieuwpoort at student dot tudelft.nl
2015-10-17 22:12 ` [Bug c/68007] " schwab@linux-m68k.org
0 siblings, 1 reply; 2+ messages in thread
From: r.f.vannieuwpoort at student dot tudelft.nl @ 2015-10-17 21:06 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68007
Bug ID: 68007
Summary: False warning for integer overflow for unsigned
integers
Product: gcc
Version: 4.8.4
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: r.f.vannieuwpoort at student dot tudelft.nl
Target Milestone: ---
The assignment of 0x7fffffff + 1 to a 32-bit unsigned integer causes a false
warning for an integer overflow (it would overflow if it was assigned to a
signed integer).
Example: uint32_t a = 0x7fffffff + 1
Compileable example:
#include <stdint.h>
int main(int argc, char *argv[])
{
uint32_t a = 0x7fffffff + 1;
return 0;
}
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/68007] False warning for integer overflow for unsigned integers
2015-10-17 21:06 [Bug c/68007] New: False warning for integer overflow for unsigned integers r.f.vannieuwpoort at student dot tudelft.nl
@ 2015-10-17 22:12 ` schwab@linux-m68k.org
0 siblings, 0 replies; 2+ messages in thread
From: schwab@linux-m68k.org @ 2015-10-17 22:12 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68007
Andreas Schwab <schwab@linux-m68k.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
0x7fffffff is of type int, and 0x7fffffff + 1 will overflow a 32-bit int.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-10-17 21:06 [Bug c/68007] New: False warning for integer overflow for unsigned integers r.f.vannieuwpoort at student dot tudelft.nl
2015-10-17 22:12 ` [Bug c/68007] " schwab@linux-m68k.org
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