/* Utility routines for data type conversion for GCC.
Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1997, 1998,
- 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GCC.
#include "toplev.h"
#include "langhooks.h"
#include "real.h"
-/* Convert EXPR to some pointer or reference type TYPE.
+/* Convert EXPR to some pointer or reference type TYPE.
EXPR must be pointer, reference, integer, enumeral, or literal zero;
in other cases error is called. */
tree
convert_to_pointer (tree type, tree expr)
{
+ if (TREE_TYPE (expr) == type)
+ return expr;
+
if (integer_zerop (expr))
- return build_int_cst (type, 0);
+ {
+ tree t = build_int_cst (type, 0);
+ if (TREE_OVERFLOW (expr) || TREE_CONSTANT_OVERFLOW (expr))
+ t = force_fit_type (t, 0, TREE_OVERFLOW (expr),
+ TREE_CONSTANT_OVERFLOW (expr));
+ return t;
+ }
switch (TREE_CODE (TREE_TYPE (expr)))
{
case POINTER_TYPE:
case REFERENCE_TYPE:
- return build1 (NOP_EXPR, type, expr);
+ return fold_build1 (NOP_EXPR, type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
if (TYPE_PRECISION (TREE_TYPE (expr)) != POINTER_SIZE)
expr = fold_build1 (NOP_EXPR,
lang_hooks.types.type_for_size (POINTER_SIZE, 0),
break;
}
}
- /* This code formerly changed (float)floor(double d) to
- floorf((float)d). This is incorrect, because (float)d uses
- round-to-nearest and can round up to the next integer. */
+ if (optimize
+ && (((fcode == BUILT_IN_FLOORL
+ || fcode == BUILT_IN_CEILL
+ || fcode == BUILT_IN_ROUNDL
+ || fcode == BUILT_IN_RINTL
+ || fcode == BUILT_IN_TRUNCL
+ || fcode == BUILT_IN_NEARBYINTL)
+ && (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_RINT
+ || 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 arg
+ = strip_float_extensions (TREE_VALUE (TREE_OPERAND (expr, 1)));
+
+ /* Make sure (type)arg0 is an extension, otherwise we could end up
+ changing (float)floor(double d) into floorf((float)d), which is
+ incorrect because (float)d uses round-to-nearest and can round
+ up to the next integer. */
+ if (TYPE_PRECISION (type) >= TYPE_PRECISION (TREE_TYPE (arg)))
+ return
+ build_function_call_expr (fn,
+ build_tree_list (NULL_TREE,
+ fold (convert_to_real (type, arg))));
+ }
+ }
/* Propagate the cast into the operation. */
if (itype != type && FLOAT_TYPE_P (type))
&& FLOAT_TYPE_P (TREE_TYPE (arg1)))
{
tree newtype = type;
+
+ if (TYPE_MODE (TREE_TYPE (arg0)) == SDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == SDmode)
+ newtype = dfloat32_type_node;
+ if (TYPE_MODE (TREE_TYPE (arg0)) == DDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == DDmode)
+ newtype = dfloat64_type_node;
+ if (TYPE_MODE (TREE_TYPE (arg0)) == TDmode
+ || TYPE_MODE (TREE_TYPE (arg1)) == TDmode)
+ newtype = dfloat128_type_node;
+ if (newtype == dfloat32_type_node
+ || newtype == dfloat64_type_node
+ || newtype == dfloat128_type_node)
+ {
+ expr = build2 (TREE_CODE (expr), newtype,
+ fold (convert_to_real (newtype, arg0)),
+ fold (convert_to_real (newtype, arg1)));
+ if (newtype == type)
+ return expr;
+ break;
+ }
+
if (TYPE_PRECISION (TREE_TYPE (arg0)) > TYPE_PRECISION (newtype))
newtype = TREE_TYPE (arg0);
if (TYPE_PRECISION (TREE_TYPE (arg1)) > TYPE_PRECISION (newtype))
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
return build1 (FLOAT_EXPR, type, expr);
case COMPLEX_TYPE:
switch (fcode)
{
- case BUILT_IN_CEIL: case BUILT_IN_CEILF: case BUILT_IN_CEILL:
+ CASE_FLT_FN (BUILT_IN_CEIL):
/* Only convert in ISO C99 mode. */
if (!TARGET_C99_FUNCTIONS)
break;
fn = mathfn_built_in (s_intype, BUILT_IN_LCEIL);
break;
- case BUILT_IN_FLOOR: case BUILT_IN_FLOORF: case BUILT_IN_FLOORL:
+ CASE_FLT_FN (BUILT_IN_FLOOR):
/* Only convert in ISO C99 mode. */
if (!TARGET_C99_FUNCTIONS)
break;
fn = mathfn_built_in (s_intype, BUILT_IN_LFLOOR);
break;
- case BUILT_IN_ROUND: case BUILT_IN_ROUNDF: case BUILT_IN_ROUNDL:
+ CASE_FLT_FN (BUILT_IN_ROUND):
if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
fn = mathfn_built_in (s_intype, BUILT_IN_LLROUND);
else
fn = mathfn_built_in (s_intype, BUILT_IN_LROUND);
break;
- case BUILT_IN_RINT: case BUILT_IN_RINTF: case BUILT_IN_RINTL:
+ CASE_FLT_FN (BUILT_IN_RINT):
/* Only convert rint* if we can ignore math exceptions. */
if (flag_trapping_math)
break;
/* ... Fall through ... */
- case BUILT_IN_NEARBYINT: case BUILT_IN_NEARBYINTF: case BUILT_IN_NEARBYINTL:
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
if (TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (long_long_integer_type_node))
fn = mathfn_built_in (s_intype, BUILT_IN_LLRINT);
else
fn = mathfn_built_in (s_intype, BUILT_IN_LRINT);
break;
- case BUILT_IN_TRUNC: case BUILT_IN_TRUNCF: case BUILT_IN_TRUNCL:
+ CASE_FLT_FN (BUILT_IN_TRUNC):
{
tree arglist = TREE_OPERAND (s_expr, 1);
return convert_to_integer (type, TREE_VALUE (arglist));
expr = fold_build1 (CONVERT_EXPR,
lang_hooks.types.type_for_size (POINTER_SIZE, 0),
expr);
- return fold_build1 (NOP_EXPR, type, expr);
+ return fold_convert (type, expr);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
/* If this is a logical operation, which just returns 0 or 1, we can
change the type of the expression. */
/* We can pass truncation down through right shifting
when the shift count is a nonpositive constant. */
if (TREE_CODE (TREE_OPERAND (expr, 1)) == INTEGER_CST
- && tree_int_cst_lt (TREE_OPERAND (expr, 1),
- convert (TREE_TYPE (TREE_OPERAND (expr, 1)),
- integer_one_node)))
+ && tree_int_cst_sgn (TREE_OPERAND (expr, 1)) <= 0)
goto trunc1;
break;
but (int) a << 32 is undefined and would get a
warning. */
- tree t = convert_to_integer (type, integer_zero_node);
+ tree t = build_int_cst (type, 0);
/* If the original expression had side-effects, we must
preserve it. */
|| ex_form == RSHIFT_EXPR
|| ex_form == LROTATE_EXPR
|| ex_form == RROTATE_EXPR))
- || ex_form == LSHIFT_EXPR)
+ || ex_form == LSHIFT_EXPR
+ /* If we have !flag_wrapv, and either ARG0 or
+ ARG1 is of a signed type, we have to do
+ PLUS_EXPR or MINUS_EXPR in an unsigned
+ type. Otherwise, we would introduce
+ signed-overflow undefinedness. */
+ || (!flag_wrapv
+ && (ex_form == PLUS_EXPR
+ || ex_form == MINUS_EXPR)
+ && (!TYPE_UNSIGNED (TREE_TYPE (arg0))
+ || !TYPE_UNSIGNED (TREE_TYPE (arg1)))))
typex = lang_hooks.types.unsigned_type (typex);
else
typex = lang_hooks.types.signed_type (typex);
case INTEGER_TYPE:
case ENUMERAL_TYPE:
case BOOLEAN_TYPE:
- case CHAR_TYPE:
return build2 (COMPLEX_EXPR, type, convert (subtype, expr),
convert (subtype, integer_zero_node));
OSDN Git Service
