On Tue, Nov 3, 2015 at 5:53 PM, Marek Polacek <[email protected]> wrote:
> The last piece for convert.c. Since convert_to_real uses fold ()
> rather than fold_buildN, I defined a new macro to keep the code
> more compact.
>
> With this committed, convert.c should be dealt with. If there's
> anything else I could help with, please let me know.
>
> Bootstrapped/regtested on x86_64-linux, ok for branch?
I wonder what happens (on trunk) when you just remove the fold () calls.
Richard.
> diff --git gcc/convert.c gcc/convert.c
> index ec6ff37..3e593db 100644
> --- gcc/convert.c
> +++ gcc/convert.c
> @@ -37,6 +37,8 @@ along with GCC; see the file COPYING3. If not see
> #include "builtins.h"
> #include "ubsan.h"
>
> +#define maybe_fold(FOLD_P, EXPR) \
> + ((FOLD_P) ? fold (EXPR) : (EXPR))
> #define maybe_fold_build1_loc(FOLD_P, LOC, CODE, TYPE, EXPR) \
> ((FOLD_P) ? fold_build1_loc (LOC, CODE, TYPE, EXPR) \
> : build1_loc (LOC, CODE, TYPE, EXPR))
> @@ -119,17 +121,19 @@ convert_to_pointer_nofold (tree type, tree expr)
> /* Convert EXPR to some floating-point type TYPE.
>
> EXPR must be float, fixed-point, integer, or enumeral;
> - in other cases error is called. */
> + in other cases error is called. If FOLD_P is true, try to fold
> + the expression. */
>
> -tree
> -convert_to_real (tree type, tree expr)
> +static tree
> +convert_to_real_1 (tree type, tree expr, bool fold_p)
> {
> enum built_in_function fcode = builtin_mathfn_code (expr);
> tree itype = TREE_TYPE (expr);
> + location_t loc = EXPR_LOCATION (expr);
>
> if (TREE_CODE (expr) == COMPOUND_EXPR)
> {
> - tree t = convert_to_real (type, TREE_OPERAND (expr, 1));
> + tree t = convert_to_real_1 (type, TREE_OPERAND (expr, 1), fold_p);
> if (t == TREE_OPERAND (expr, 1))
> return expr;
> return build2_loc (EXPR_LOCATION (expr), COMPOUND_EXPR, TREE_TYPE (t),
> @@ -237,14 +241,13 @@ convert_to_real (tree type, tree expr)
> || TYPE_MODE (newtype) == TYPE_MODE (float_type_node)))
> {
> tree fn = mathfn_built_in (newtype, fcode);
> -
> if (fn)
> - {
> - tree arg = fold (convert_to_real (newtype, arg0));
> - expr = build_call_expr (fn, 1, arg);
> - if (newtype == type)
> - return expr;
> - }
> + {
> + tree arg = convert_to_real_1 (newtype, arg0, fold_p);
> + expr = build_call_expr (fn, 1, maybe_fold (fold_p,
> arg));
> + if (newtype == type)
> + return expr;
> + }
> }
> }
> default:
> @@ -263,9 +266,11 @@ convert_to_real (tree type, tree expr)
> if (!flag_rounding_math
> && FLOAT_TYPE_P (itype)
> && TYPE_PRECISION (type) < TYPE_PRECISION (itype))
> - return build1 (TREE_CODE (expr), type,
> - fold (convert_to_real (type,
> - TREE_OPERAND (expr, 0))));
> + {
> + tree arg = convert_to_real_1 (type, TREE_OPERAND (expr, 0),
> + fold_p);
> + return build1 (TREE_CODE (expr), type, maybe_fold (fold_p,
> arg));
> + }
> break;
> /* Convert (outertype)((innertype0)a+(innertype1)b)
> into ((newtype)a+(newtype)b) where newtype
> @@ -301,8 +306,14 @@ convert_to_real (tree type, tree expr)
> || newtype == dfloat128_type_node)
> {
> expr = build2 (TREE_CODE (expr), newtype,
> - fold (convert_to_real (newtype, arg0)),
> - fold (convert_to_real (newtype, arg1)));
> + maybe_fold (fold_p,
> + convert_to_real_1 (newtype,
> + arg0,
> + fold_p)),
> + maybe_fold (fold_p,
> + convert_to_real_1 (newtype,
> + arg1,
> + fold_p)));
> if (newtype == type)
> return expr;
> break;
> @@ -341,8 +352,14 @@ convert_to_real (tree type, tree expr)
> && !excess_precision_type (newtype))))
> {
> expr = build2 (TREE_CODE (expr), newtype,
> - fold (convert_to_real (newtype, arg0)),
> - fold (convert_to_real (newtype, arg1)));
> + maybe_fold (fold_p,
> + convert_to_real_1 (newtype,
> + arg0,
> + fold_p)),
> + maybe_fold (fold_p,
> + convert_to_real_1 (newtype,
> + arg1,
> + fold_p)));
> if (newtype == type)
> return expr;
> }
> @@ -373,20 +390,39 @@ convert_to_real (tree type, tree expr)
>
> case COMPLEX_TYPE:
> return convert (type,
> - fold_build1 (REALPART_EXPR,
> - TREE_TYPE (TREE_TYPE (expr)), expr));
> + maybe_fold_build1_loc (fold_p, loc, REALPART_EXPR,
> + TREE_TYPE (TREE_TYPE (expr)),
> + expr));
>
> case POINTER_TYPE:
> case REFERENCE_TYPE:
> error ("pointer value used where a floating point value was expected");
> - return convert_to_real (type, integer_zero_node);
> + return convert_to_real_1 (type, integer_zero_node, fold_p);
>
> default:
> error ("aggregate value used where a float was expected");
> - return convert_to_real (type, integer_zero_node);
> + return convert_to_real_1 (type, integer_zero_node, fold_p);
> }
> }
>
> +/* A wrapper around convert_to_real_1 that always folds the
> + expression. */
> +
> +tree
> +convert_to_real (tree type, tree expr)
> +{
> + return convert_to_real_1 (type, expr, true);
> +}
> +
> +/* A wrapper around convert_to_real_1 that only folds the
> + expression if it is CONSTANT_CLASS_P. */
> +
> +tree
> +convert_to_real_nofold (tree type, tree expr)
> +{
> + return convert_to_real_1 (type, expr, CONSTANT_CLASS_P (expr));
> +}
> +
> /* Convert EXPR to some integer (or enum) type TYPE.
>
> EXPR must be pointer, integer, discrete (enum, char, or bool), float,
> diff --git gcc/convert.h gcc/convert.h
> index 6cb439e..7cc3168 100644
> --- gcc/convert.h
> +++ gcc/convert.h
> @@ -25,6 +25,7 @@ extern tree convert_to_integer_nofold (tree, tree);
> extern tree convert_to_pointer (tree, tree);
> extern tree convert_to_pointer_nofold (tree, tree);
> extern tree convert_to_real (tree, tree);
> +extern tree convert_to_real_nofold (tree, tree);
> extern tree convert_to_fixed (tree, tree);
> extern tree convert_to_complex (tree, tree);
> extern tree convert_to_complex_nofold (tree, tree);
> diff --git gcc/cp/call.c gcc/cp/call.c
> index 79f8cfa..5b21b9f 100644
> --- gcc/cp/call.c
> +++ gcc/cp/call.c
> @@ -6742,7 +6742,7 @@ convert_arg_to_ellipsis (tree arg, tsubst_flags_t
> complain)
> "implicit conversion from %qT to %qT when passing "
> "argument to function",
> arg_type, double_type_node);
> - arg = convert_to_real (double_type_node, arg);
> + arg = convert_to_real_nofold (double_type_node, arg);
> }
> else if (NULLPTR_TYPE_P (arg_type))
> arg = null_pointer_node;
> diff --git gcc/cp/cvt.c gcc/cp/cvt.c
> index 1368f15..97b0b89 100644
> --- gcc/cp/cvt.c
> +++ gcc/cp/cvt.c
> @@ -846,7 +846,7 @@ ocp_convert (tree type, tree expr, int convtype, int
> flags,
> TREE_TYPE (e));
> }
> if (code == REAL_TYPE)
> - return convert_to_real (type, e);
> + return convert_to_real_nofold (type, e);
> else if (code == COMPLEX_TYPE)
> return convert_to_complex_nofold (type, e);
> }
>
> Marek
