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testsuite: Fix vect/vect-sdiv-pow2-1.c

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We're now able to vectorise the set-up loop:

      int p = power2 (fns[i].po2);
      for (int j = 0; j < N; j++)
        a[j] = ((p << 4) * j) / (N - 1) - (p << 5);

This patch adds an asm to stop the loop being vectorised.

gcc/testsuite/
	* gcc.dg/vect/vect-sdiv-pow2-1.c (main): Add an asm to the
	set-up loop.
This commit is contained in:
Richard Sandiford 2020-11-18 18:40:30 +00:00
parent 92648faa1c
commit 0f545ad9b6
1 changed files with 4 additions and 1 deletions
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gcc/testsuite/gcc.dg/vect/vect-sdiv-pow2-1.c
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@ -62,7 +62,10 @@ main (void)
{
int p = power2 (fns[i].po2);
for (int j = 0; j < N; j++)
a[j] = ((p << 4) * j) / (N - 1) - (p << 5);
{
a[j] = ((p << 4) * j) / (N - 1) - (p << 5);
asm volatile ("" ::: "memory");
}
fns[i].div (b, a, N);
fns[i].mod (c, a, N);