This moves the fold rules for trunc, floor, ceil, round, nearbyint and
rint in one go, since they're tested as a group. Most of the code is
supporting the f(x)->x fold when x is known to be integer-valued.
Like with the non-negative test, this is probably more elegantly handled
by tracking range information for reals, but until that happens, I think
we should handle it analogously to tree_expr_nonnegative_p.
I've incorporated the fix for PR68031 in the new version of
integer_valued_real_p. However, it seemed confusing to test for an
SSA name at the head of the function rather than the case statement,
and not fall through to tree_simple_nonnegative_warnv_p (which
conceptually shouldn't care whether an update is in progress).
But tree_simple_nonnegative_warnv_p is a no-op for SSA names,
so I simply changed it to:
return (!name_registered_for_update_p (t)
&& depth < PARAM_VALUE (PARAM_MAX_SSA_NAME_QUERY_DEPTH)
&& gimple_stmt_nonnegative_warnv_p (SSA_NAME_DEF_STMT (t),
strict_overflow_p, depth));
and used that in the new code too.
Doing these folds later meant that IPA would start to use information
about the aborting sinf and floor in
20030125-1.c before the folds
kicked in. I changed them from noinline to weak to stop that.
Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.
gcc/
* builtins.c (integer_valued_real_p): Move to fold-const.c.
(fold_trunc_transparent_mathfn, fold_builtin_trunc, fold_builtin_floor)
(fold_builtin_ceil, fold_builtin_round): Delete.
(fold_builtin_1): Handle constant trunc, floor, ceil and round
arguments here.
* convert.c (convert_to_real): Remove narrowing of rounding
functions.
* fold-const.h (integer_valued_real_unary_p)
(integer_valued_real_binary_p, integer_valued_real_call_p)
(integer_valued_real_single_p, integer_valued_real_p): Declare.
* fold-const.c (tree_single_nonnegative_warnv_p): Move
name_registered_for_update_p check to SSA_NAME case statement.
Don't call tree_simple_nonnegative_warnv_p for SSA names.
(integer_valued_real_unary_p, integer_valued_real_binary_p)
(integer_valued_real_call_p, integer_valued_real_single_p)
(integer_valued_real_invalid_p): New functions.
(integer_valued_real_p): Move from fold-const.c and rework
to call the functions above. Handle SSA names.
* gimple-fold.h (gimple_stmt_integer_valued_real_p): Declare.
* gimple-fold.c (gimple_assign_integer_valued_real_p)
(gimple_call_integer_valued_real_p, gimple_phi_integer_valued_real_p)
(gimple_stmt_integer_valued_real_p): New functions.
* match.pd: Fold f(f(x))->f(x) for fp->fp rounding functions f.
Fold f(x)->x for the same f if x is known to be integer-valued.
Fold f(extend(x))->extend(f'(x)) if doing so doesn't affect
the result. Canonicalize floor(x) as trunc(x) if x is
nonnegative.
gcc/testsuite/
* gcc.c-torture/execute/
20030125-1.c (floor, floorf, sin, sinf):
Make weak rather than noinline.
* gcc.dg/builtins-57.c: Compile with -O.
* gcc.dg/torture/builtin-integral-1.c: Skip for -O0.
From-SVN: r229221
+2015-10-23 Richard Sandiford <richard.sandiford@arm.com>
+
+ * builtins.c (integer_valued_real_p): Move to fold-const.c.
+ (fold_trunc_transparent_mathfn, fold_builtin_trunc, fold_builtin_floor)
+ (fold_builtin_ceil, fold_builtin_round): Delete.
+ (fold_builtin_1): Handle constant trunc, floor, ceil and round
+ arguments here.
+ * convert.c (convert_to_real): Remove narrowing of rounding
+ functions.
+ * fold-const.h (integer_valued_real_unary_p)
+ (integer_valued_real_binary_p, integer_valued_real_call_p)
+ (integer_valued_real_single_p, integer_valued_real_p): Declare.
+ * fold-const.c (tree_single_nonnegative_warnv_p): Move
+ name_registered_for_update_p check to SSA_NAME case statement.
+ Don't call tree_simple_nonnegative_warnv_p for SSA names.
+ (integer_valued_real_unary_p, integer_valued_real_binary_p)
+ (integer_valued_real_call_p, integer_valued_real_single_p)
+ (integer_valued_real_invalid_p): New functions.
+ (integer_valued_real_p): Move from fold-const.c and rework
+ to call the functions above. Handle SSA names.
+ * gimple-fold.h (gimple_stmt_integer_valued_real_p): Declare.
+ * gimple-fold.c (gimple_assign_integer_valued_real_p)
+ (gimple_call_integer_valued_real_p, gimple_phi_integer_valued_real_p)
+ (gimple_stmt_integer_valued_real_p): New functions.
+ * match.pd: Fold f(f(x))->f(x) for fp->fp rounding functions f.
+ Fold f(x)->x for the same f if x is known to be integer-valued.
+ Fold f(extend(x))->extend(f'(x)) if doing so doesn't affect
+ the result. Canonicalize floor(x) as trunc(x) if x is
+ nonnegative.
+
2015-10-23 Tom de Vries <tom@codesourcery.com>
* tree-ssa-structalias.c (intra_create_variable_infos): Use
static tree fold_builtin_nan (tree, tree, int);
static tree rewrite_call_expr (location_t, tree, int, tree, int, ...);
static bool validate_arg (const_tree, enum tree_code code);
-static bool integer_valued_real_p (tree);
-static tree fold_trunc_transparent_mathfn (location_t, tree, tree);
static rtx expand_builtin_fabs (tree, rtx, rtx);
static rtx expand_builtin_signbit (tree, rtx);
static tree fold_builtin_pow (location_t, tree, tree, tree, tree);
static tree fold_builtin_powi (location_t, tree, tree, tree, tree);
-static tree fold_builtin_trunc (location_t, tree, tree);
-static tree fold_builtin_floor (location_t, tree, tree);
-static tree fold_builtin_ceil (location_t, tree, tree);
-static tree fold_builtin_round (location_t, tree, tree);
static tree fold_builtin_int_roundingfn (location_t, tree, tree);
static tree fold_builtin_bitop (tree, tree);
static tree fold_builtin_strchr (location_t, tree, tree, tree);
return build_real (type, real);
}
-/* Return true if the floating point expression T has an integer value.
- We also allow +Inf, -Inf and NaN to be considered integer values. */
-
-static bool
-integer_valued_real_p (tree t)
-{
- switch (TREE_CODE (t))
- {
- case FLOAT_EXPR:
- return true;
-
- case ABS_EXPR:
- case SAVE_EXPR:
- return integer_valued_real_p (TREE_OPERAND (t, 0));
-
- case COMPOUND_EXPR:
- case MODIFY_EXPR:
- case BIND_EXPR:
- return integer_valued_real_p (TREE_OPERAND (t, 1));
-
- case PLUS_EXPR:
- case MINUS_EXPR:
- case MULT_EXPR:
- case MIN_EXPR:
- case MAX_EXPR:
- return integer_valued_real_p (TREE_OPERAND (t, 0))
- && integer_valued_real_p (TREE_OPERAND (t, 1));
-
- case COND_EXPR:
- return integer_valued_real_p (TREE_OPERAND (t, 1))
- && integer_valued_real_p (TREE_OPERAND (t, 2));
-
- case REAL_CST:
- return real_isinteger (TREE_REAL_CST_PTR (t), TYPE_MODE (TREE_TYPE (t)));
-
- CASE_CONVERT:
- {
- tree type = TREE_TYPE (TREE_OPERAND (t, 0));
- if (TREE_CODE (type) == INTEGER_TYPE)
- return true;
- if (TREE_CODE (type) == REAL_TYPE)
- return integer_valued_real_p (TREE_OPERAND (t, 0));
- break;
- }
-
- case CALL_EXPR:
- switch (builtin_mathfn_code (t))
- {
- CASE_FLT_FN (BUILT_IN_CEIL):
- CASE_FLT_FN (BUILT_IN_FLOOR):
- CASE_FLT_FN (BUILT_IN_NEARBYINT):
- CASE_FLT_FN (BUILT_IN_RINT):
- CASE_FLT_FN (BUILT_IN_ROUND):
- CASE_FLT_FN (BUILT_IN_TRUNC):
- return true;
-
- CASE_FLT_FN (BUILT_IN_FMIN):
- CASE_FLT_FN (BUILT_IN_FMAX):
- return integer_valued_real_p (CALL_EXPR_ARG (t, 0))
- && integer_valued_real_p (CALL_EXPR_ARG (t, 1));
-
- default:
- break;
- }
- break;
-
- default:
- break;
- }
- return false;
-}
-
-/* FNDECL is assumed to be a builtin where truncation can be propagated
- across (for instance floor((double)f) == (double)floorf (f).
- Do the transformation for a call with argument ARG. */
-
-static tree
-fold_trunc_transparent_mathfn (location_t loc, tree fndecl, tree arg)
-{
- enum built_in_function fcode = DECL_FUNCTION_CODE (fndecl);
-
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- /* Integer rounding functions are idempotent. */
- if (fcode == builtin_mathfn_code (arg))
- return arg;
-
- /* If argument is already integer valued, and we don't need to worry
- about setting errno, there's no need to perform rounding. */
- if (! flag_errno_math && integer_valued_real_p (arg))
- return arg;
-
- if (optimize)
- {
- tree arg0 = strip_float_extensions (arg);
- tree ftype = TREE_TYPE (TREE_TYPE (fndecl));
- tree newtype = TREE_TYPE (arg0);
- tree decl;
-
- if (TYPE_PRECISION (newtype) < TYPE_PRECISION (ftype)
- && (decl = mathfn_built_in (newtype, fcode)))
- return fold_convert_loc (loc, ftype,
- build_call_expr_loc (loc, decl, 1,
- fold_convert_loc (loc,
- newtype,
- arg0)));
- }
- return NULL_TREE;
-}
-
/* FNDECL is assumed to be builtin which can narrow the FP type of
the argument, for instance lround((double)f) -> lroundf (f).
Do the transformation for a call with argument ARG. */
return NULL_TREE;
}
-/* Fold function call to builtin trunc, truncf or truncl with argument ARG.
- Return NULL_TREE if no simplification can be made. */
-
-static tree
-fold_builtin_trunc (location_t loc, tree fndecl, tree arg)
-{
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- /* Optimize trunc of constant value. */
- if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
- {
- REAL_VALUE_TYPE r, x;
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
-
- x = TREE_REAL_CST (arg);
- real_trunc (&r, TYPE_MODE (type), &x);
- return build_real (type, r);
- }
-
- return fold_trunc_transparent_mathfn (loc, fndecl, arg);
-}
-
-/* Fold function call to builtin floor, floorf or floorl with argument ARG.
- Return NULL_TREE if no simplification can be made. */
-
-static tree
-fold_builtin_floor (location_t loc, tree fndecl, tree arg)
-{
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- /* Optimize floor of constant value. */
- if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
- {
- REAL_VALUE_TYPE x;
-
- x = TREE_REAL_CST (arg);
- if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
- {
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
- REAL_VALUE_TYPE r;
-
- real_floor (&r, TYPE_MODE (type), &x);
- return build_real (type, r);
- }
- }
-
- /* Fold floor (x) where x is nonnegative to trunc (x). */
- if (tree_expr_nonnegative_p (arg))
- {
- tree truncfn = mathfn_built_in (TREE_TYPE (arg), BUILT_IN_TRUNC);
- if (truncfn)
- return build_call_expr_loc (loc, truncfn, 1, arg);
- }
-
- return fold_trunc_transparent_mathfn (loc, fndecl, arg);
-}
-
-/* Fold function call to builtin ceil, ceilf or ceill with argument ARG.
- Return NULL_TREE if no simplification can be made. */
-
-static tree
-fold_builtin_ceil (location_t loc, tree fndecl, tree arg)
-{
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- /* Optimize ceil of constant value. */
- if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
- {
- REAL_VALUE_TYPE x;
-
- x = TREE_REAL_CST (arg);
- if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
- {
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
- REAL_VALUE_TYPE r;
-
- real_ceil (&r, TYPE_MODE (type), &x);
- return build_real (type, r);
- }
- }
-
- return fold_trunc_transparent_mathfn (loc, fndecl, arg);
-}
-
-/* Fold function call to builtin round, roundf or roundl with argument ARG.
- Return NULL_TREE if no simplification can be made. */
-
-static tree
-fold_builtin_round (location_t loc, tree fndecl, tree arg)
-{
- if (!validate_arg (arg, REAL_TYPE))
- return NULL_TREE;
-
- /* Optimize round of constant value. */
- if (TREE_CODE (arg) == REAL_CST && !TREE_OVERFLOW (arg))
- {
- REAL_VALUE_TYPE x;
-
- x = TREE_REAL_CST (arg);
- if (! REAL_VALUE_ISNAN (x) || ! flag_errno_math)
- {
- tree type = TREE_TYPE (TREE_TYPE (fndecl));
- REAL_VALUE_TYPE r;
-
- real_round (&r, TYPE_MODE (type), &x);
- return build_real (type, r);
- }
- }
-
- return fold_trunc_transparent_mathfn (loc, fndecl, arg);
-}
-
/* Fold function call to builtin lround, lroundf or lroundl (or the
corresponding long long versions) and other rounding functions. ARG
is the argument to the call. Return NULL_TREE if no simplification
return fold_builtin_nan (arg0, type, false);
CASE_FLT_FN (BUILT_IN_FLOOR):
- return fold_builtin_floor (loc, fndecl, arg0);
+ if (TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0))
+ {
+ REAL_VALUE_TYPE x = TREE_REAL_CST (arg0);
+ if (!REAL_VALUE_ISNAN (x) || !flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+ real_floor (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+ break;
CASE_FLT_FN (BUILT_IN_CEIL):
- return fold_builtin_ceil (loc, fndecl, arg0);
+ if (TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0))
+ {
+ REAL_VALUE_TYPE x = TREE_REAL_CST (arg0);
+ if (!REAL_VALUE_ISNAN (x) || !flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+ real_ceil (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+ break;
CASE_FLT_FN (BUILT_IN_TRUNC):
- return fold_builtin_trunc (loc, fndecl, arg0);
+ if (TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0))
+ {
+ REAL_VALUE_TYPE x = TREE_REAL_CST (arg0);
+ REAL_VALUE_TYPE r;
+ real_trunc (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ break;
CASE_FLT_FN (BUILT_IN_ROUND):
- return fold_builtin_round (loc, fndecl, arg0);
-
- CASE_FLT_FN (BUILT_IN_NEARBYINT):
- CASE_FLT_FN (BUILT_IN_RINT):
- return fold_trunc_transparent_mathfn (loc, fndecl, arg0);
+ if (TREE_CODE (arg0) == REAL_CST && !TREE_OVERFLOW (arg0))
+ {
+ REAL_VALUE_TYPE x = TREE_REAL_CST (arg0);
+ if (!REAL_VALUE_ISNAN (x) || !flag_errno_math)
+ {
+ tree type = TREE_TYPE (TREE_TYPE (fndecl));
+ REAL_VALUE_TYPE r;
+ real_round (&r, TYPE_MODE (type), &x);
+ return build_real (type, r);
+ }
+ }
+ break;
CASE_FLT_FN (BUILT_IN_ICEIL):
CASE_FLT_FN (BUILT_IN_LCEIL):
break;
}
}
- 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 (CALL_EXPR_ARG (expr, 0));
-
- /* 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_call_expr (fn, 1, fold (convert_to_real (type, arg)));
- }
- }
/* Propagate the cast into the operation. */
if (itype != type && FLOAT_TYPE_P (type))
bool
tree_single_nonnegative_warnv_p (tree t, bool *strict_overflow_p, int depth)
{
- if (TREE_CODE (t) == SSA_NAME
- && name_registered_for_update_p (t))
- return false;
-
if (TYPE_UNSIGNED (TREE_TYPE (t)))
return true;
If this code misses important cases that unbounded recursion
would not, passes that need this information could be revised
to provide it through dataflow propagation. */
- if (depth < PARAM_VALUE (PARAM_MAX_SSA_NAME_QUERY_DEPTH))
- return gimple_stmt_nonnegative_warnv_p (SSA_NAME_DEF_STMT (t),
- strict_overflow_p, depth);
+ return (!name_registered_for_update_p (t)
+ && depth < PARAM_VALUE (PARAM_MAX_SSA_NAME_QUERY_DEPTH)
+ && gimple_stmt_nonnegative_warnv_p (SSA_NAME_DEF_STMT (t),
+ strict_overflow_p, depth));
- /* Fallthru. */
default:
return tree_simple_nonnegative_warnv_p (TREE_CODE (t), TREE_TYPE (t));
}
return false;
}
+#define integer_valued_real_p(X) \
+ _Pragma ("GCC error \"Use RECURSE for recursive calls\"") 0
+
+#define RECURSE(X) \
+ ((integer_valued_real_p) (X, depth + 1))
+
+/* Return true if the floating point result of (CODE OP0) has an
+ integer value. We also allow +Inf, -Inf and NaN to be considered
+ integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+integer_valued_real_unary_p (tree_code code, tree op0, int depth)
+{
+ switch (code)
+ {
+ case FLOAT_EXPR:
+ return true;
+
+ case ABS_EXPR:
+ return RECURSE (op0);
+
+ CASE_CONVERT:
+ {
+ tree type = TREE_TYPE (op0);
+ if (TREE_CODE (type) == INTEGER_TYPE)
+ return true;
+ if (TREE_CODE (type) == REAL_TYPE)
+ return RECURSE (op0);
+ break;
+ }
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* Return true if the floating point result of (CODE OP0 OP1) has an
+ integer value. We also allow +Inf, -Inf and NaN to be considered
+ integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+integer_valued_real_binary_p (tree_code code, tree op0, tree op1, int depth)
+{
+ switch (code)
+ {
+ case PLUS_EXPR:
+ case MINUS_EXPR:
+ case MULT_EXPR:
+ case MIN_EXPR:
+ case MAX_EXPR:
+ return RECURSE (op0) && RECURSE (op1);
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* Return true if the floating point result of calling FNDECL with arguments
+ ARG0 and ARG1 has an integer value. We also allow +Inf, -Inf and NaN to be
+ considered integer values. If FNDECL takes fewer than 2 arguments,
+ the remaining ARGn are null.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+integer_valued_real_call_p (tree fndecl, tree arg0, tree arg1, int depth)
+{
+ if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ CASE_FLT_FN (BUILT_IN_RINT):
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ return true;
+
+ CASE_FLT_FN (BUILT_IN_FMIN):
+ CASE_FLT_FN (BUILT_IN_FMAX):
+ return RECURSE (arg0) && RECURSE (arg1);
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* Return true if the floating point expression T (a GIMPLE_SINGLE_RHS)
+ has an integer value. We also allow +Inf, -Inf and NaN to be
+ considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+integer_valued_real_single_p (tree t, int depth)
+{
+ switch (TREE_CODE (t))
+ {
+ case REAL_CST:
+ return real_isinteger (TREE_REAL_CST_PTR (t), TYPE_MODE (TREE_TYPE (t)));
+
+ case COND_EXPR:
+ return RECURSE (TREE_OPERAND (t, 1)) && RECURSE (TREE_OPERAND (t, 2));
+
+ case SSA_NAME:
+ /* Limit the depth of recursion to avoid quadratic behavior.
+ This is expected to catch almost all occurrences in practice.
+ If this code misses important cases that unbounded recursion
+ would not, passes that need this information could be revised
+ to provide it through dataflow propagation. */
+ return (!name_registered_for_update_p (t)
+ && depth < PARAM_VALUE (PARAM_MAX_SSA_NAME_QUERY_DEPTH)
+ && gimple_stmt_integer_valued_real_p (SSA_NAME_DEF_STMT (t),
+ depth));
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* Return true if the floating point expression T (a GIMPLE_INVALID_RHS)
+ has an integer value. We also allow +Inf, -Inf and NaN to be
+ considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+static bool
+integer_valued_real_invalid_p (tree t, int depth)
+{
+ switch (TREE_CODE (t))
+ {
+ case COMPOUND_EXPR:
+ case MODIFY_EXPR:
+ case BIND_EXPR:
+ return RECURSE (TREE_OPERAND (t, 1));
+
+ case SAVE_EXPR:
+ return RECURSE (TREE_OPERAND (t, 0));
+
+ default:
+ break;
+ }
+ return false;
+}
+
+#undef RECURSE
+#undef integer_valued_real_p
+
+/* Return true if the floating point expression T has an integer value.
+ We also allow +Inf, -Inf and NaN to be considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+integer_valued_real_p (tree t, int depth)
+{
+ if (t == error_mark_node)
+ return false;
+
+ tree_code code = TREE_CODE (t);
+ switch (TREE_CODE_CLASS (code))
+ {
+ case tcc_binary:
+ case tcc_comparison:
+ return integer_valued_real_binary_p (code, TREE_OPERAND (t, 0),
+ TREE_OPERAND (t, 1), depth);
+
+ case tcc_unary:
+ return integer_valued_real_unary_p (code, TREE_OPERAND (t, 0), depth);
+
+ case tcc_constant:
+ case tcc_declaration:
+ case tcc_reference:
+ return integer_valued_real_single_p (t, depth);
+
+ default:
+ break;
+ }
+
+ switch (code)
+ {
+ case COND_EXPR:
+ case SSA_NAME:
+ return integer_valued_real_single_p (t, depth);
+
+ case CALL_EXPR:
+ {
+ tree arg0 = (call_expr_nargs (t) > 0
+ ? CALL_EXPR_ARG (t, 0)
+ : NULL_TREE);
+ tree arg1 = (call_expr_nargs (t) > 1
+ ? CALL_EXPR_ARG (t, 1)
+ : NULL_TREE);
+ return integer_valued_real_call_p (get_callee_fndecl (t),
+ arg0, arg1, depth);
+ }
+
+ default:
+ return integer_valued_real_invalid_p (t, depth);
+ }
+}
+
/* Given the components of a binary expression CODE, TYPE, OP0 and OP1,
attempt to fold the expression to a constant without modifying TYPE,
OP0 or OP1.
extern bool tree_call_nonnegative_warnv_p (tree, tree, tree, tree, bool *,
int);
+extern bool integer_valued_real_unary_p (tree_code, tree, int);
+extern bool integer_valued_real_binary_p (tree_code, tree, tree, int);
+extern bool integer_valued_real_call_p (tree, tree, tree, int);
+extern bool integer_valued_real_single_p (tree, int);
+extern bool integer_valued_real_p (tree, int = 0);
+
extern bool fold_real_zero_addition_p (const_tree, const_tree, int);
extern tree combine_comparisons (location_t, enum tree_code, enum tree_code,
enum tree_code, tree, tree, tree);
return false;
}
}
+
+/* Return true if the floating-point value computed by assignment STMT
+ is known to have an integer value. We also allow +Inf, -Inf and NaN
+ to be considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+static bool
+gimple_assign_integer_valued_real_p (gimple *stmt, int depth)
+{
+ enum tree_code code = gimple_assign_rhs_code (stmt);
+ switch (get_gimple_rhs_class (code))
+ {
+ case GIMPLE_UNARY_RHS:
+ return integer_valued_real_unary_p (gimple_assign_rhs_code (stmt),
+ gimple_assign_rhs1 (stmt), depth);
+ case GIMPLE_BINARY_RHS:
+ return integer_valued_real_binary_p (gimple_assign_rhs_code (stmt),
+ gimple_assign_rhs1 (stmt),
+ gimple_assign_rhs2 (stmt), depth);
+ case GIMPLE_TERNARY_RHS:
+ return false;
+ case GIMPLE_SINGLE_RHS:
+ return integer_valued_real_single_p (gimple_assign_rhs1 (stmt), depth);
+ case GIMPLE_INVALID_RHS:
+ break;
+ }
+ gcc_unreachable ();
+}
+
+/* Return true if the floating-point value computed by call STMT is known
+ to have an integer value. We also allow +Inf, -Inf and NaN to be
+ considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+static bool
+gimple_call_integer_valued_real_p (gimple *stmt, int depth)
+{
+ tree arg0 = (gimple_call_num_args (stmt) > 0
+ ? gimple_call_arg (stmt, 0)
+ : NULL_TREE);
+ tree arg1 = (gimple_call_num_args (stmt) > 1
+ ? gimple_call_arg (stmt, 1)
+ : NULL_TREE);
+ return integer_valued_real_call_p (gimple_call_fndecl (stmt),
+ arg0, arg1, depth);
+}
+
+/* Return true if the floating-point result of phi STMT is known to have
+ an integer value. We also allow +Inf, -Inf and NaN to be considered
+ integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+static bool
+gimple_phi_integer_valued_real_p (gimple *stmt, int depth)
+{
+ for (unsigned i = 0; i < gimple_phi_num_args (stmt); ++i)
+ {
+ tree arg = gimple_phi_arg_def (stmt, i);
+ if (!integer_valued_real_single_p (arg, depth + 1))
+ return false;
+ }
+ return true;
+}
+
+/* Return true if the floating-point value computed by STMT is known
+ to have an integer value. We also allow +Inf, -Inf and NaN to be
+ considered integer values.
+
+ DEPTH is the current nesting depth of the query. */
+
+bool
+gimple_stmt_integer_valued_real_p (gimple *stmt, int depth)
+{
+ switch (gimple_code (stmt))
+ {
+ case GIMPLE_ASSIGN:
+ return gimple_assign_integer_valued_real_p (stmt, depth);
+ case GIMPLE_CALL:
+ return gimple_call_integer_valued_real_p (stmt, depth);
+ case GIMPLE_PHI:
+ return gimple_phi_integer_valued_real_p (stmt, depth);
+ default:
+ return false;
+ }
+}
}
extern bool gimple_stmt_nonnegative_warnv_p (gimple *, bool *, int = 0);
+extern bool gimple_stmt_integer_valued_real_p (gimple *, int = 0);
/* In gimple-match.c. */
extern tree gimple_simplify (enum tree_code, tree, tree,
zerop
CONSTANT_CLASS_P
tree_expr_nonnegative_p
+ integer_valued_real_p
integer_pow2p
HONOR_NANS)
BUILT_IN_COPYSIGN
BUILT_IN_COPYSIGNL)
(define_operator_list CABS BUILT_IN_CABSF BUILT_IN_CABS BUILT_IN_CABSL)
+(define_operator_list TRUNC BUILT_IN_TRUNCF BUILT_IN_TRUNC BUILT_IN_TRUNCL)
+(define_operator_list FLOOR BUILT_IN_FLOORF BUILT_IN_FLOOR BUILT_IN_FLOORL)
+(define_operator_list CEIL BUILT_IN_CEILF BUILT_IN_CEIL BUILT_IN_CEILL)
+(define_operator_list ROUND BUILT_IN_ROUNDF BUILT_IN_ROUND BUILT_IN_ROUNDL)
+(define_operator_list NEARBYINT BUILT_IN_NEARBYINTF
+ BUILT_IN_NEARBYINT
+ BUILT_IN_NEARBYINTL)
+(define_operator_list RINT BUILT_IN_RINTF BUILT_IN_RINT BUILT_IN_RINTL)
/* Simplifications of operations with one constant operand and
simplifications to constants or single values. */
(CABS (complex:c @0 real_zerop@1))
(abs @0))
+/* trunc(trunc(x)) -> trunc(x), etc. */
+(for fns (TRUNC FLOOR CEIL ROUND NEARBYINT RINT)
+ (simplify
+ (fns (fns @0))
+ (fns @0)))
+/* f(x) -> x if x is integer valued and f does nothing for such values. */
+(for fns (TRUNC FLOOR CEIL ROUND NEARBYINT)
+ (simplify
+ (fns integer_valued_real_p@0)
+ @0))
+/* Same for rint. We have to check flag_errno_math because
+ integer_valued_real_p accepts +Inf, -Inf and NaNs as integers. */
+(if (!flag_errno_math)
+ (simplify
+ (RINT integer_valued_real_p@0)
+ @0))
+
/* Canonicalization of sequences of math builtins. These rules represent
IL simplifications but are not necessarily optimizations.
(CABS (complex @0 @0))
(mult (abs @0) { build_real_truncate (type, dconst_sqrt2 ()); })))
+(if (canonicalize_math_p ())
+ /* floor(x) -> trunc(x) if x is nonnegative. */
+ (for floors (FLOOR)
+ truncs (TRUNC)
+ (simplify
+ (floors tree_expr_nonnegative_p@0)
+ (truncs @0))))
+
+(match double_value_p
+ @0
+ (if (TYPE_MAIN_VARIANT (TREE_TYPE (@0)) == double_type_node)))
+(for froms (BUILT_IN_TRUNCL
+ BUILT_IN_FLOORL
+ BUILT_IN_CEILL
+ BUILT_IN_ROUNDL
+ BUILT_IN_NEARBYINTL
+ BUILT_IN_RINTL)
+ tos (BUILT_IN_TRUNC
+ BUILT_IN_FLOOR
+ BUILT_IN_CEIL
+ BUILT_IN_ROUND
+ BUILT_IN_NEARBYINT
+ BUILT_IN_RINT)
+ /* truncl(extend(x)) -> extend(trunc(x)), etc., if x is a double. */
+ (if (optimize && canonicalize_math_p ())
+ (simplify
+ (froms (convert double_value_p@0))
+ (convert (tos @0)))))
+
+(match float_value_p
+ @0
+ (if (TYPE_MAIN_VARIANT (TREE_TYPE (@0)) == float_type_node)))
+(for froms (BUILT_IN_TRUNCL BUILT_IN_TRUNC
+ BUILT_IN_FLOORL BUILT_IN_FLOOR
+ BUILT_IN_CEILL BUILT_IN_CEIL
+ BUILT_IN_ROUNDL BUILT_IN_ROUND
+ BUILT_IN_NEARBYINTL BUILT_IN_NEARBYINT
+ BUILT_IN_RINTL BUILT_IN_RINT)
+ tos (BUILT_IN_TRUNCF BUILT_IN_TRUNCF
+ BUILT_IN_FLOORF BUILT_IN_FLOORF
+ BUILT_IN_CEILF BUILT_IN_CEILF
+ BUILT_IN_ROUNDF BUILT_IN_ROUNDF
+ BUILT_IN_NEARBYINTF BUILT_IN_NEARBYINTF
+ BUILT_IN_RINTF BUILT_IN_RINTF)
+ /* truncl(extend(x)) and trunc(extend(x)) -> extend(truncf(x)), etc.,
+ if x is a float. */
+ (if (optimize && canonicalize_math_p ())
+ (simplify
+ (froms (convert float_value_p@0))
+ (convert (tos @0)))))
+
/* cproj(x) -> x if we're ignoring infinities. */
(simplify
(CPROJ @0)
+2015-10-23 Richard Sandiford <richard.sandiford@arm.com>
+
+ * gcc.c-torture/execute/20030125-1.c (floor, floorf, sin, sinf):
+ Make weak rather than noinline.
+ * gcc.dg/builtins-57.c: Compile with -O.
+ * gcc.dg/torture/builtin-integral-1.c: Skip for -O0.
+
2015-10-23 Tom de Vries <tom@codesourcery.com>
* gcc.dg/tree-ssa/restrict-4.c: Add -fno-ipa-icf to dg-options.
/* Verify whether math functions are simplified. */
/* { dg-require-effective-target c99_runtime } */
+/* { dg-require-weak } */
double sin(double);
double floor(double);
float
#endif
return 0;
}
-__attribute__ ((noinline))
+__attribute__ ((weak))
double
floor(double a)
{
abort ();
}
-__attribute__ ((noinline))
+__attribute__ ((weak))
float
floorf(float a)
{
return a;
}
-__attribute__ ((noinline))
+__attribute__ ((weak))
double
sin(double a)
{
return a;
}
-__attribute__ ((noinline))
+__attribute__ ((weak))
float
sinf(float a)
{
/* { dg-do link } */
-/* { dg-options "-std=c99 -ffinite-math-only" } */
+/* { dg-options "-std=c99 -ffinite-math-only -O" } */
#include "builtins-config.h"
that various math functions are marked const/pure and can be
folded. */
/* { dg-options "-ffinite-math-only -fno-math-errno" } */
+/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */
extern int link_failure (int);
projects / thirdparty / gcc.git / commitdiff
