Viewing file:  pr98161.c (1 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -msse4" } */
/* { dg-require-effective-target sse4} */
typedef unsigned short u16;
typedef unsigned int u32;
typedef unsigned char u8;
u32
__attribute__((__force_align_arg_pointer__))
unreach(const u16 * pu16, u16 *dst, u32 dstlen, const u8 *src, u32 srclen)
{
for (u32 i = dstlen; srclen && i; i--, srclen--, src++, dst++)
{
u16 off = pu16[*src];
if (off)
{
src++; srclen--;
*dst = pu16[off + *src];
}
}
return 56;
}
u32
__attribute__((__force_align_arg_pointer__))
__attribute__((noipa))
bug(const u16 * pu16, u16 *dst, u32 dstlen, const u8 *src, u32 srclen)
{
if (pu16)
/* Branch should not execute, but stack realignment
* reads wrong 'pu16' value from stack. */
return unreach(pu16, dst, dstlen, src, srclen);
return (srclen < dstlen) ? srclen : dstlen;
}
int
main()
{
if (__builtin_cpu_supports ("sse4.1"))
{
/* Should return 12 */
if (bug(0, 0, 12, 0, 34) != 12)
__builtin_abort ();
}
return 0;
}
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