/* Combine two constants ARG1 and ARG2 under operation CODE to produce a new
constant. We assume ARG1 and ARG2 have the same data type, or at least
- are the same kind of constant and the same machine mode.
+ are the same kind of constant and the same machine mode. Return zero if
+ combining the constants is not allowed in the current operating mode.
If NOTRUNC is nonzero, do not truncate the result to fit the data type. */
static tree
const_binop (enum tree_code code, tree arg1, tree arg2, int notrunc)
{
+ /* Sanity check for the recursive cases. */
+ if (!arg1 || !arg2)
+ return NULL_TREE;
+
STRIP_NOPS (arg1);
STRIP_NOPS (arg2);
/* Don't constant fold this floating point operation if
the result has overflowed and flag_trapping_math. */
-
if (flag_trapping_math
&& MODE_HAS_INFINITIES (mode)
&& REAL_VALUE_ISINF (result)
result may dependent upon the run-time rounding mode and
flag_rounding_math is set, or if GCC's software emulation
is unable to accurately represent the result. */
-
if ((flag_rounding_math
|| (REAL_MODE_FORMAT_COMPOSITE_P (mode)
&& !flag_unsafe_math_optimizations))
tree i1 = TREE_IMAGPART (arg1);
tree r2 = TREE_REALPART (arg2);
tree i2 = TREE_IMAGPART (arg2);
- tree t;
+ tree real, imag;
switch (code)
{
case PLUS_EXPR:
- t = build_complex (type,
- const_binop (PLUS_EXPR, r1, r2, notrunc),
- const_binop (PLUS_EXPR, i1, i2, notrunc));
- break;
-
case MINUS_EXPR:
- t = build_complex (type,
- const_binop (MINUS_EXPR, r1, r2, notrunc),
- const_binop (MINUS_EXPR, i1, i2, notrunc));
+ real = const_binop (code, r1, r2, notrunc);
+ imag = const_binop (code, i1, i2, notrunc);
break;
case MULT_EXPR:
- t = build_complex (type,
- const_binop (MINUS_EXPR,
- const_binop (MULT_EXPR,
- r1, r2, notrunc),
- const_binop (MULT_EXPR,
- i1, i2, notrunc),
- notrunc),
- const_binop (PLUS_EXPR,
- const_binop (MULT_EXPR,
- r1, i2, notrunc),
- const_binop (MULT_EXPR,
- i1, r2, notrunc),
- notrunc));
+ real = const_binop (MINUS_EXPR,
+ const_binop (MULT_EXPR, r1, r2, notrunc),
+ const_binop (MULT_EXPR, i1, i2, notrunc),
+ notrunc);
+ imag = const_binop (PLUS_EXPR,
+ const_binop (MULT_EXPR, r1, i2, notrunc),
+ const_binop (MULT_EXPR, i1, r2, notrunc),
+ notrunc);
break;
case RDIV_EXPR:
{
- tree t1, t2, real, imag;
tree magsquared
= const_binop (PLUS_EXPR,
const_binop (MULT_EXPR, r2, r2, notrunc),
const_binop (MULT_EXPR, i2, i2, notrunc),
notrunc);
-
- t1 = const_binop (PLUS_EXPR,
- const_binop (MULT_EXPR, r1, r2, notrunc),
- const_binop (MULT_EXPR, i1, i2, notrunc),
- notrunc);
- t2 = const_binop (MINUS_EXPR,
- const_binop (MULT_EXPR, i1, r2, notrunc),
- const_binop (MULT_EXPR, r1, i2, notrunc),
- notrunc);
+ tree t1
+ = const_binop (PLUS_EXPR,
+ const_binop (MULT_EXPR, r1, r2, notrunc),
+ const_binop (MULT_EXPR, i1, i2, notrunc),
+ notrunc);
+ tree t2
+ = const_binop (MINUS_EXPR,
+ const_binop (MULT_EXPR, i1, r2, notrunc),
+ const_binop (MULT_EXPR, r1, i2, notrunc),
+ notrunc);
if (INTEGRAL_TYPE_P (TREE_TYPE (r1)))
- {
- real = const_binop (TRUNC_DIV_EXPR, t1, magsquared, notrunc);
- imag = const_binop (TRUNC_DIV_EXPR, t2, magsquared, notrunc);
- }
- else
- {
- real = const_binop (RDIV_EXPR, t1, magsquared, notrunc);
- imag = const_binop (RDIV_EXPR, t2, magsquared, notrunc);
- if (!real || !imag)
- return NULL_TREE;
- }
+ code = TRUNC_DIV_EXPR;
- t = build_complex (type, real, imag);
+ real = const_binop (code, t1, magsquared, notrunc);
+ imag = const_binop (code, t2, magsquared, notrunc);
}
break;
default:
return NULL_TREE;
}
- return t;
+
+ if (real && imag)
+ return build_complex (type, real, imag);
}
+
return NULL_TREE;
}
if (TYPE_UNSIGNED (TREE_TYPE (arg0)) != TYPE_UNSIGNED (TREE_TYPE (arg1)))
return 0;
+ /* If both types don't have the same precision, then it is not safe
+ to strip NOPs. */
+ if (TYPE_PRECISION (TREE_TYPE (arg0)) != TYPE_PRECISION (TREE_TYPE (arg1)))
+ return 0;
+
STRIP_NOPS (arg0);
STRIP_NOPS (arg1);
else
{
arg00 = arg0;
- arg01 = fold_convert (type, integer_one_node);
+ arg01 = build_one_cst (type);
}
if (TREE_CODE (arg1) == MULT_EXPR)
{
else
{
arg10 = arg1;
- arg11 = fold_convert (type, integer_one_node);
+ arg11 = build_one_cst (type);
}
same = NULL_TREE;
native_encode_vector (tree expr, unsigned char *ptr, int len)
{
int i, size, offset, count;
- tree elem, elements;
+ tree itype, elem, elements;
- size = 0;
offset = 0;
elements = TREE_VECTOR_CST_ELTS (expr);
count = TYPE_VECTOR_SUBPARTS (TREE_TYPE (expr));
+ itype = TREE_TYPE (TREE_TYPE (expr));
+ size = GET_MODE_SIZE (TYPE_MODE (itype));
for (i = 0; i < count; i++)
{
if (elements)
if (elem)
{
- size = native_encode_expr (elem, ptr+offset, len-offset);
- if (size == 0)
+ if (native_encode_expr (elem, ptr+offset, len-offset) != size)
return 0;
}
- else if (size != 0)
+ else
{
if (offset + size > len)
return 0;
memset (ptr+offset, 0, size);
}
- else
- return 0;
offset += size;
}
return offset;
/* (-A) * (-B) -> A * B */
if (TREE_CODE (arg0) == NEGATE_EXPR && negate_expr_p (arg1))
return fold_build2 (MULT_EXPR, type,
- TREE_OPERAND (arg0, 0),
- negate_expr (arg1));
+ fold_convert (type, TREE_OPERAND (arg0, 0)),
+ fold_convert (type, negate_expr (arg1)));
if (TREE_CODE (arg1) == NEGATE_EXPR && negate_expr_p (arg0))
return fold_build2 (MULT_EXPR, type,
- negate_expr (arg0),
- TREE_OPERAND (arg1, 0));
+ fold_convert (type, negate_expr (arg0)),
+ fold_convert (type, TREE_OPERAND (arg1, 0)));
if (! FLOAT_TYPE_P (type))
{
&& TREE_CODE (TREE_OPERAND (arg0, 1)) == INTEGER_CST
&& 0 != (tem = const_binop (TREE_CODE (arg0) == PLUS_EXPR
? MINUS_EXPR : PLUS_EXPR,
- arg1, TREE_OPERAND (arg0, 1), 0))
+ fold_convert (TREE_TYPE (arg0), arg1),
+ TREE_OPERAND (arg0, 1), 0))
&& ! TREE_CONSTANT_OVERFLOW (tem))
return fold_build2 (code, type, TREE_OPERAND (arg0, 0), tem);
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