Viewing file:  loop-versioning-12.c (2.21 KB) -rw-r--r--
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/* { dg-options "-O3 -fdump-tree-lversion-details" } */
/* Test that we don't try to version for a step of 1 when that would
cause the iterations to overlap. */
void
f1 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx] = 100;
x[i * stepx + 1] = 99;
}
}
void
f2 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i] = 100;
x[i + 1] = 99;
}
}
void
f3 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx - 16] = 100;
x[i * stepx - 15] = 99;
}
}
void
f4 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i - 16] = 100;
x[i - 15] = 99;
}
}
void
f5 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx - 16] = 100;
x[i * stepx + 15] = 99;
}
}
void
f6 (unsigned short *x, int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i - 16] = 100;
x[i + 15] = 99;
}
}
void
f7 (unsigned short *x, int stepx, int n)
{
for (unsigned short *y = x; y < x + n; y += stepx)
{
y[0] = 100;
y[1] = 99;
}
}
unsigned short x[1000];
void
g1 (int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx] = 100;
x[i * stepx + 1] = 99;
}
}
void
g2 (int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i] = 100;
x[i + 1] = 99;
}
}
void
g3 (int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx - 16] = 100;
x[i * stepx - 15] = 99;
}
}
void
g4 (int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i - 16] = 100;
x[i - 15] = 99;
}
}
void
g5 (int stepx, int n)
{
for (int i = 0; i < n; ++i)
{
x[i * stepx - 16] = 100;
x[i * stepx + 15] = 99;
}
}
void
g6 (int stepx, int n)
{
for (int i = 0; i < n; i += stepx)
{
x[i - 16] = 100;
x[i + 15] = 99;
}
}
void
g7 (int stepx, int n)
{
for (unsigned short *y = x; y < x + n; y += stepx)
{
y[0] = 100;
y[1] = 99;
}
}
/* { dg-final { scan-tree-dump-not {want to version} "lversion" } } */
/* { dg-final { scan-tree-dump-not {versioned} "lversion" } } */
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