Viewing file:  pr59597.c (1.28 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-Ofast -fdisable-tree-cunrolli -fdump-tree-threadfull1-details" } */
typedef unsigned short u16;
typedef unsigned char u8;
typedef unsigned int u32;
__extension__ typedef __INT32_TYPE__ i32;
long int random(int);
#define NNN 10
u32 f[NNN], t[NNN];
static u16
Calc_crc8 (u8 data, u16 crc)
{
u8 i=0,x16=0,carry=0;
for (i = 0; i < 8; i++)
{
x16 = (u8)((data & 1) ^ ((u8)crc & 1));
data >>= 1;
if (x16 == 1)
{
crc ^= 0x4002;
carry = 1;
}
else
carry = 0;
crc >>= 1;
if (carry)
crc |= 0x8000;
else
crc &= 0x7fff;
}
return crc;
}
int
main (int argc, char argv[])
{
int i; i32 j; u16 crc;
for (j = 0; j < 10000000; j++)
{
for (i = 0; i < NNN; i++)
{
f[i] = random(i);
t[i] = random(NNN - i - 1);
}
for (i=0; i<NNN; i++)
{
crc=Calc_crc8(f[i],(u16)argc);
crc=Calc_crc8(t[i],crc);
}
}
return crc;
}
/* We used to have no threads in vrp-thread1 because all the attempted
ones would cross loops. Now we get 30+ threads before VRP because
of loop unrolling. A better option is to disable unrolling and
test for the original 4 threads that this test was testing. */
/* { dg-final { scan-tree-dump-times "Registering jump thread" 4 "threadfull1" } } */
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