https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66980
Bug ID: 66980
Summary: [graphite] -floop-nest-optimize produces wrong code
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: spop at gcc dot gnu.org
Target Milestone: ---
$ cat s.c
void foo(unsigned char *in, unsigned char *out, int w, int h)
{
unsigned int i, j;
for (i = 0; i < 3*w*h; i++)
for (j = 0; j < 3*w*h; j++)
out[i * w + j] = in[(i * w + j)*3] + in[(i * w + j)*3 + 1] + in[(i * w +
j)*3 + 2];
}
$ gcc -O3 -floop-nest-optimize -S s.c -o -
[...]
foo:
ret
[...]
