/* Test the attribute((optimize)) really works. Do this test by checking
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/* Test the attribute((optimize)) really works. Do this test by checking
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whether we vectorize a simple loop. */
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whether we vectorize a simple loop. */
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/* { dg-do compile } */
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/* { dg-do compile } */
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/* { dg-options "-O1 -msse2 -mfpmath=sse -march=k8" } */
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/* { dg-options "-O1 -msse2 -mfpmath=sse -march=k8" } */
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/* { dg-require-effective-target sse2 } */
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/* { dg-require-effective-target sse2 } */
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/* { dg-final { scan-assembler "prefetcht0" } } */
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/* { dg-final { scan-assembler "prefetcht0" } } */
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/* { dg-final { scan-assembler "addps" } } */
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/* { dg-final { scan-assembler "addps" } } */
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/* { dg-final { scan-assembler "subss" } } */
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/* { dg-final { scan-assembler "subss" } } */
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|
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#define SIZE 10240
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#define SIZE 10240
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float a[SIZE] __attribute__((__aligned__(32)));
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float a[SIZE] __attribute__((__aligned__(32)));
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float b[SIZE] __attribute__((__aligned__(32)));
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float b[SIZE] __attribute__((__aligned__(32)));
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float c[SIZE] __attribute__((__aligned__(32)));
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float c[SIZE] __attribute__((__aligned__(32)));
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|
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/* This should vectorize. */
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/* This should vectorize. */
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void opt3 (void) __attribute__((__optimize__(3,"unroll-all-loops,-fprefetch-loop-arrays")));
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void opt3 (void) __attribute__((__optimize__(3,"unroll-all-loops,-fprefetch-loop-arrays")));
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|
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void
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void
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opt3 (void)
|
opt3 (void)
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{
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{
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int i;
|
int i;
|
|
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for (i = 0; i < SIZE; i++)
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for (i = 0; i < SIZE; i++)
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a[i] = b[i] + c[i];
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a[i] = b[i] + c[i];
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}
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}
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|
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/* This should not vectorize. */
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/* This should not vectorize. */
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void
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void
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not_opt3 (void)
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not_opt3 (void)
|
{
|
{
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int i;
|
int i;
|
|
|
for (i = 0; i < SIZE; i++)
|
for (i = 0; i < SIZE; i++)
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a[i] = b[i] - c[i];
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a[i] = b[i] - c[i];
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}
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}
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