https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64277
Ilya Enkovich <enkovich.gnu at gmail dot com> changed:
What |Removed |Added
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CC| |enkovich.gnu at gmail dot com
--- Comment #7 from Ilya Enkovich <enkovich.gnu at gmail dot com> ---
Here is a reduced test case:
>cat test.c
int f1[10];
void foo(short a[], short m, unsigned short l)
{
int i = l;
for (i = i + 5; i < m; i++)
f1[i] = a[i]++;
}
>gcc test.c -O3 -c -Wall
test.c: In function 'foo':
test.c:6:7: warning: array subscript is above array bounds [-Warray-bounds]
f1[i] = a[i]++;
^
test.c:6:7: warning: array subscript is above array bounds [-Warray-bounds]
test.c:6:7: warning: array subscript is above array bounds [-Warray-bounds]
test.c:6:7: warning: array subscript is above array bounds [-Warray-bounds]
test.c:6:7: warning: array subscript is above array bounds [-Warray-bounds]
Here we have complete unroll of the loop by 10 due to f1 size. Later vrp
complains of last five produced iterations accessing above array bounds.
Used GCC 5.0.
