On Jan 1, 2007, at 21:14, Ian Lance Taylor wrote:
[...]
extern void bar (void);
void
foo (int m)
{
int i;
for (i = 1; i < m; ++i)
{
if (i > 0)
bar ();
}
}
Here the limit for i without -fwrapv becomes (1, INF]. This enables
VRP to eliminate the test "i > 0". With -fwra
On Jan 1, 2007, at 12:16, Joseph S. Myers wrote:
For a program to be secure in the face of overflow, it will
generally need
explicit checks for overflow, and so -fwrapv will only help if such
checks
have been written under the presumption of -fwrapv semantics.
Yes, but often people do writ
On Dec 31, 2006, at 19:13, Daniel Berlin wrote:
Note the distinct drop in performance across almost all the benchmarks
on Dec 30, including popular programs like bzip2 and gzip.
Not so.
To my eyes, the specint 2000 mean went UP by about 1% for the
base -O3 compilation. The peak enabled more un
