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testsuite: add another test for the rotate vectorization miscompilation

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This time with short and char where the used mask used to be larger
than it should have been.

2020-09-18  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/97081
	* gcc.dg/vect/pr97081-2.c: New test.
This commit is contained in:
Jakub Jelinek 2020-09-18 15:05:53 +02:00
parent 9c9b88fdcf
commit 3d3fe967b0
1 changed files with 32 additions and 0 deletions
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32
gcc/testsuite/gcc.dg/vect/pr97081-2.c Normal file
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/* PR tree-optimization/97081 */
#include "tree-vect.h"
unsigned short s[1024];
unsigned char c[1024];
__attribute__((noipa)) void
foo (int n)
{
for (int i = 0; i < 1024; i++)
s[i] = (s[i] << n) | (s[i] >> (__SIZEOF_SHORT__ * __CHAR_BIT__ - n));
for (int i = 0; i < 1024; i++)
c[i] = (c[i] << n) | (c[i] >> (__CHAR_BIT__ - n));
}
int
main ()
{
check_vect ();
for (int i = 0; i < 1024; i++)
{
s[i] = i;
c[i] = i;
}
foo (3);
for (int i = 0; i < 1024; i++)
if (s[i] != (unsigned short) ((i << 3) | (i >> (__SIZEOF_SHORT__ * __CHAR_BIT__ - 3)))
|| c[i] != (unsigned char) ((((unsigned char) i) << 3) | (((unsigned char) i) >> (__CHAR_BIT__ - 3))))
__builtin_abort ();
return 0;
}