#include "config.h"
#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
#include "tree.h"
#include "flags.h"
#include "convert.h"
#include "toplev.h"
#include "langhooks.h"
-
+#include "real.h"
/* Convert EXPR to some pointer or reference type TYPE.
EXPR must be pointer, reference, integer, enumeral, or literal zero;
}
}
+/* Avoid any floating point extensions from EXP. */
+tree
+strip_float_extensions (exp)
+ tree exp;
+{
+ tree sub, expt, subt;
+
+ /* For floating point constant look up the narrowest type that can hold
+ it properly and handle it like (type)(narrowest_type)constant.
+ This way we can optimize for instance a=a*2.0 where "a" is float
+ but 2.0 is double constant. */
+ if (TREE_CODE (exp) == REAL_CST)
+ {
+ REAL_VALUE_TYPE orig;
+ tree type = NULL;
+
+ orig = TREE_REAL_CST (exp);
+ if (TYPE_PRECISION (TREE_TYPE (exp)) > TYPE_PRECISION (float_type_node)
+ && exact_real_truncate (TYPE_MODE (float_type_node), &orig))
+ type = float_type_node;
+ else if (TYPE_PRECISION (TREE_TYPE (exp))
+ > TYPE_PRECISION (double_type_node)
+ && exact_real_truncate (TYPE_MODE (double_type_node), &orig))
+ type = double_type_node;
+ if (type)
+ return build_real (type, real_value_truncate (TYPE_MODE (type), orig));
+ }
+
+ if (TREE_CODE (exp) != NOP_EXPR)
+ return exp;
+
+ sub = TREE_OPERAND (exp, 0);
+ subt = TREE_TYPE (sub);
+ expt = TREE_TYPE (exp);
+
+ if (!FLOAT_TYPE_P (subt))
+ return exp;
+
+ if (TYPE_PRECISION (subt) > TYPE_PRECISION (expt))
+ return exp;
+
+ return strip_float_extensions (sub);
+}
+
+
/* Convert EXPR to some floating-point type TYPE.
EXPR must be float, integer, or enumeral;
convert_to_real (type, expr)
tree type, expr;
{
+ enum built_in_function fcode = builtin_mathfn_code (expr);
+ tree itype = TREE_TYPE (expr);
+
+ /* Disable until we figure out how to decide whether the functions are
+ present in runtime. */
+ /* Convert (float)sqrt((double)x) where x is float into sqrtf(x) */
+ if ((fcode == BUILT_IN_SQRT
+ || fcode == BUILT_IN_SQRTL
+ || fcode == BUILT_IN_SIN
+ || fcode == BUILT_IN_SINL
+ || fcode == BUILT_IN_COS
+ || fcode == BUILT_IN_COSL
+ || fcode == BUILT_IN_EXP
+ || fcode == BUILT_IN_EXPL)
+ && optimize
+ && (TYPE_MODE (type) == TYPE_MODE (double_type_node)
+ || TYPE_MODE (type) == TYPE_MODE (float_type_node)))
+ {
+ tree arg0 = strip_float_extensions (TREE_VALUE (TREE_OPERAND (expr, 1)));
+ tree newtype = type;
+
+ /* We have (outertype)sqrt((innertype)x). Choose the wider mode from
+ the both as the safe type for operation. */
+ if (TYPE_PRECISION (TREE_TYPE (arg0)) > TYPE_PRECISION (type))
+ newtype = TREE_TYPE (arg0);
+
+ /* Be curefull about integer to fp conversions.
+ These may overflow still. */
+ if (FLOAT_TYPE_P (TREE_TYPE (arg0))
+ && TYPE_PRECISION (newtype) < TYPE_PRECISION (itype)
+ && (TYPE_MODE (newtype) == TYPE_MODE (double_type_node)
+ || TYPE_MODE (newtype) == TYPE_MODE (float_type_node)))
+ {
+ tree arglist;
+ tree fn = mathfn_built_in (newtype, fcode);
+
+ if (fn)
+ {
+ arglist = build_tree_list (NULL_TREE, fold (convert_to_real (newtype, arg0)));
+ expr = build_function_call_expr (fn, arglist);
+ if (newtype == type)
+ return expr;
+ }
+ }
+ }
+ if (optimize
+ && (((fcode == BUILT_IN_FLOORL
+ || fcode == BUILT_IN_CEILL
+ || fcode == BUILT_IN_ROUND
+ || fcode == BUILT_IN_TRUNC
+ || fcode == BUILT_IN_NEARBYINT)
+ && (TYPE_MODE (type) == TYPE_MODE (double_type_node)
+ || TYPE_MODE (type) == TYPE_MODE (float_type_node)))
+ || ((fcode == BUILT_IN_FLOOR
+ || fcode == BUILT_IN_CEIL
+ || fcode == BUILT_IN_ROUND
+ || fcode == BUILT_IN_TRUNC
+ || fcode == BUILT_IN_NEARBYINT)
+ && (TYPE_MODE (type) == TYPE_MODE (float_type_node)))))
+ {
+ tree fn = mathfn_built_in (type, fcode);
+
+ if (fn)
+ {
+ tree arg0 = strip_float_extensions (TREE_VALUE (TREE_OPERAND (expr,
+ 1)));
+ tree arglist = build_tree_list (NULL_TREE,
+ fold (convert_to_real (type, arg0)));
+
+ return build_function_call_expr (fn, arglist);
+ }
+ }
+
+ /* Propagate the cast into the operation. */
+ if (itype != type && FLOAT_TYPE_P (type))
+ switch (TREE_CODE (expr))
+ {
+ /* convert (float)-x into -(float)x. This is always safe. */
+ case ABS_EXPR:
+ case NEGATE_EXPR:
+ if (TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (expr)))
+ return build1 (TREE_CODE (expr), type,
+ fold (convert_to_real (type,
+ TREE_OPERAND (expr, 0))));
+ break;
+ /* convert (outertype)((innertype0)a+(innertype1)b)
+ into ((newtype)a+(newtype)b) where newtype
+ is the widest mode from all of these. */
+ case PLUS_EXPR:
+ case MINUS_EXPR:
+ case MULT_EXPR:
+ case RDIV_EXPR:
+ {
+ tree arg0 = strip_float_extensions (TREE_OPERAND (expr, 0));
+ tree arg1 = strip_float_extensions (TREE_OPERAND (expr, 1));
+
+ if (FLOAT_TYPE_P (TREE_TYPE (arg0))
+ && FLOAT_TYPE_P (TREE_TYPE (arg1)))
+ {
+ tree newtype = type;
+ if (TYPE_PRECISION (TREE_TYPE (arg0)) > TYPE_PRECISION (newtype))
+ newtype = TREE_TYPE (arg0);
+ if (TYPE_PRECISION (TREE_TYPE (arg1)) > TYPE_PRECISION (newtype))
+ newtype = TREE_TYPE (arg1);
+ if (TYPE_PRECISION (newtype) < TYPE_PRECISION (itype))
+ {
+ expr = build (TREE_CODE (expr), newtype,
+ fold (convert_to_real (newtype, arg0)),
+ fold (convert_to_real (newtype, arg1)));
+ if (newtype == type)
+ return expr;
+ }
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
switch (TREE_CODE (TREE_TYPE (expr)))
{
case REAL_TYPE:
case LSHIFT_EXPR:
/* We can pass truncation down through left shifting
- when the shift count is a nonnegative constant. */
+ when the shift count is a nonnegative constant and
+ the target type is unsigned. */
if (TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST
&& tree_int_cst_sgn (TREE_OPERAND (expr, 1)) >= 0
+ && TREE_UNSIGNED (type)
&& TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST)
{
/* If shift count is less than the width of the truncated type,
/* Don't do unsigned arithmetic where signed was wanted,
or vice versa.
Exception: if both of the original operands were
- unsigned then can safely do the work as unsigned.
+ unsigned then we can safely do the work as unsigned.
+ Exception: shift operations take their type solely
+ from the first argument.
+ Exception: the LSHIFT_EXPR case above requires that
+ we perform this operation unsigned lest we produce
+ signed-overflow undefinedness.
And we may need to do it as unsigned
if we truncate to the original size. */
if (TREE_UNSIGNED (TREE_TYPE (expr))
|| (TREE_UNSIGNED (TREE_TYPE (arg0))
- && TREE_UNSIGNED (TREE_TYPE (arg1))))
+ && (TREE_UNSIGNED (TREE_TYPE (arg1))
+ || ex_form == LSHIFT_EXPR
+ || ex_form == RSHIFT_EXPR
+ || ex_form == LROTATE_EXPR
+ || ex_form == RROTATE_EXPR))
+ || ex_form == LSHIFT_EXPR)
typex = (*lang_hooks.types.unsigned_type) (typex);
else
typex = (*lang_hooks.types.signed_type) (typex);
}
case NOP_EXPR:
+ /* Don't introduce a
+ "can't convert between vector values of different size" error. */
+ if (TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0))) == VECTOR_TYPE
+ && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (TREE_OPERAND (expr, 0))))
+ != GET_MODE_SIZE (TYPE_MODE (type))))
+ break;
/* If truncating after truncating, might as well do all at once.
If truncating after extending, we may get rid of wasted work. */
return convert (type, get_unwidened (TREE_OPERAND (expr, 0), type));
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