Viewing file:  pr55116-2.c (1.95 KB) -rw-r--r--
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/* { dg-do compile { target { ! ia32 } } } */
/* { dg-require-effective-target maybe_x32 } */
/* { dg-options "-O2 -mx32 -maddress-mode=long" } */
typedef struct rtx_def *rtx;
enum rtx_code { MINUS };
union rtunion_def {
rtx rt_rtx;
};
typedef union rtunion_def rtunion;
struct rtx_def {
enum rtx_code code: 16;
union u {
rtunion fld[1];
}
u;
};
rtx simplify_binary_operation (enum rtx_code code, int mode,
rtx op0, rtx op1);
struct simplify_plus_minus_op_data {
rtx op;
short neg;
};
void simplify_plus_minus (enum rtx_code code, int mode, rtx op0, rtx op1)
{
struct simplify_plus_minus_op_data ops[8];
rtx tem = (rtx) 0;
int n_ops = 2, input_ops = 2;
int changed, canonicalized = 0;
int i, j;
__builtin_memset (ops, 0, sizeof (ops));
do
{
changed = 0;
for (i = 0; i < n_ops; i++)
{
rtx this_op = ops[i].op;
int this_neg = ops[i].neg;
enum rtx_code this_code = ((enum rtx_code) (this_op)->code);
switch (this_code)
{
case MINUS:
if (n_ops == 7)
return;
n_ops++;
input_ops++;
changed = 1;
canonicalized |= this_neg;
break;
}
}
}
while (changed);
do
{
j = n_ops - 1;
for (i = n_ops - 1; j >= 0; j--)
{
rtx lhs = ops[j].op, rhs = ops[i].op;
int lneg = ops[j].neg, rneg = ops[i].neg;
if (lhs != 0 && rhs != 0)
{
enum rtx_code ncode = MINUS;
if (((enum rtx_code) (lhs)->code) == MINUS)
tem = simplify_binary_operation (ncode, mode, lhs, rhs);
if (tem && ! (((enum rtx_code) (tem)->code) == MINUS
&& ((((((tem)->u.fld[0]).rt_rtx))->u.fld[0]).rt_rtx) == lhs
&& ((((((tem)->u.fld[0]).rt_rtx))->u.fld[1]).rt_rtx) == rhs))
{
lneg &= rneg;
ops[i].op = tem;
ops[i].neg = lneg;
ops[j].op = (rtx) 0;
changed = 1;
canonicalized = 1;
}
}
}
for (i = 0, j = 0; j < n_ops; j++)
if (ops[j].op)
{
ops[i] = ops[j];
i++;
}
}
while (changed);
}
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