*STRICT_OVERFLOW_P. */
bool
+tree_call_nonnegative_warnv_p (enum tree_code code, tree type, tree fndecl,
+ tree arg0, tree arg1, bool *strict_overflow_p)
+{
+ if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
+ switch (DECL_FUNCTION_CODE (fndecl))
+ {
+ CASE_FLT_FN (BUILT_IN_ACOS):
+ CASE_FLT_FN (BUILT_IN_ACOSH):
+ CASE_FLT_FN (BUILT_IN_CABS):
+ CASE_FLT_FN (BUILT_IN_COSH):
+ CASE_FLT_FN (BUILT_IN_ERFC):
+ CASE_FLT_FN (BUILT_IN_EXP):
+ CASE_FLT_FN (BUILT_IN_EXP10):
+ CASE_FLT_FN (BUILT_IN_EXP2):
+ CASE_FLT_FN (BUILT_IN_FABS):
+ CASE_FLT_FN (BUILT_IN_FDIM):
+ CASE_FLT_FN (BUILT_IN_HYPOT):
+ CASE_FLT_FN (BUILT_IN_POW10):
+ CASE_INT_FN (BUILT_IN_FFS):
+ CASE_INT_FN (BUILT_IN_PARITY):
+ CASE_INT_FN (BUILT_IN_POPCOUNT):
+ case BUILT_IN_BSWAP32:
+ case BUILT_IN_BSWAP64:
+ /* Always true. */
+ return true;
+
+ CASE_FLT_FN (BUILT_IN_SQRT):
+ /* sqrt(-0.0) is -0.0. */
+ if (!HONOR_SIGNED_ZEROS (TYPE_MODE (type)))
+ return true;
+ return tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p);
+
+ CASE_FLT_FN (BUILT_IN_ASINH):
+ CASE_FLT_FN (BUILT_IN_ATAN):
+ CASE_FLT_FN (BUILT_IN_ATANH):
+ CASE_FLT_FN (BUILT_IN_CBRT):
+ CASE_FLT_FN (BUILT_IN_CEIL):
+ CASE_FLT_FN (BUILT_IN_ERF):
+ CASE_FLT_FN (BUILT_IN_EXPM1):
+ CASE_FLT_FN (BUILT_IN_FLOOR):
+ CASE_FLT_FN (BUILT_IN_FMOD):
+ CASE_FLT_FN (BUILT_IN_FREXP):
+ CASE_FLT_FN (BUILT_IN_LCEIL):
+ CASE_FLT_FN (BUILT_IN_LDEXP):
+ CASE_FLT_FN (BUILT_IN_LFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLCEIL):
+ CASE_FLT_FN (BUILT_IN_LLFLOOR):
+ CASE_FLT_FN (BUILT_IN_LLRINT):
+ CASE_FLT_FN (BUILT_IN_LLROUND):
+ CASE_FLT_FN (BUILT_IN_LRINT):
+ CASE_FLT_FN (BUILT_IN_LROUND):
+ CASE_FLT_FN (BUILT_IN_MODF):
+ CASE_FLT_FN (BUILT_IN_NEARBYINT):
+ CASE_FLT_FN (BUILT_IN_RINT):
+ CASE_FLT_FN (BUILT_IN_ROUND):
+ CASE_FLT_FN (BUILT_IN_SCALB):
+ CASE_FLT_FN (BUILT_IN_SCALBLN):
+ CASE_FLT_FN (BUILT_IN_SCALBN):
+ CASE_FLT_FN (BUILT_IN_SIGNBIT):
+ CASE_FLT_FN (BUILT_IN_SIGNIFICAND):
+ CASE_FLT_FN (BUILT_IN_SINH):
+ CASE_FLT_FN (BUILT_IN_TANH):
+ CASE_FLT_FN (BUILT_IN_TRUNC):
+ /* True if the 1st argument is nonnegative. */
+ return tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p);
+
+ CASE_FLT_FN (BUILT_IN_FMAX):
+ /* True if the 1st OR 2nd arguments are nonnegative. */
+ return (tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p)
+ || (tree_expr_nonnegative_warnv_p (arg1,
+ strict_overflow_p)));
+
+ CASE_FLT_FN (BUILT_IN_FMIN):
+ /* True if the 1st AND 2nd arguments are nonnegative. */
+ return (tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p)
+ && (tree_expr_nonnegative_warnv_p (arg1,
+ strict_overflow_p)));
+
+ CASE_FLT_FN (BUILT_IN_COPYSIGN):
+ /* True if the 2nd argument is nonnegative. */
+ return tree_expr_nonnegative_warnv_p (arg1,
+ strict_overflow_p);
+
+ CASE_FLT_FN (BUILT_IN_POWI):
+ /* True if the 1st argument is nonnegative or the second
+ argument is an even integer. */
+ if (TREE_CODE (arg1) == INTEGER_CST)
+ {
+ tree arg1 = arg1;
+ if ((TREE_INT_CST_LOW (arg1) & 1) == 0)
+ return true;
+ }
+ return tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p);
+
+ CASE_FLT_FN (BUILT_IN_POW):
+ /* True if the 1st argument is nonnegative or the second
+ argument is an even integer valued real. */
+ if (TREE_CODE (arg1) == REAL_CST)
+ {
+ REAL_VALUE_TYPE c;
+ HOST_WIDE_INT n;
+
+ c = TREE_REAL_CST (arg1);
+ n = real_to_integer (&c);
+ if ((n & 1) == 0)
+ {
+ REAL_VALUE_TYPE cint;
+ real_from_integer (&cint, VOIDmode, n,
+ n < 0 ? -1 : 0, 0);
+ if (real_identical (&c, &cint))
+ return true;
+ }
+ }
+ return tree_expr_nonnegative_warnv_p (arg0,
+ strict_overflow_p);
+
+ default:
+ break;
+ }
+ return tree_simple_nonnegative_warnv_p (code,
+ type);
+}
+
+/* Return true if T is known to be non-negative. If the return
+ value is based on the assumption that signed overflow is undefined,
+ set *STRICT_OVERFLOW_P to true; otherwise, don't change
+ *STRICT_OVERFLOW_P. */
+
+bool
tree_invalid_nonnegative_warnv_p (tree t, bool *strict_overflow_p)
{
enum tree_code code = TREE_CODE (t);
case CALL_EXPR:
{
- tree fndecl = get_callee_fndecl (t);
- if (fndecl && DECL_BUILT_IN_CLASS (fndecl) == BUILT_IN_NORMAL)
- switch (DECL_FUNCTION_CODE (fndecl))
- {
- CASE_FLT_FN (BUILT_IN_ACOS):
- CASE_FLT_FN (BUILT_IN_ACOSH):
- CASE_FLT_FN (BUILT_IN_CABS):
- CASE_FLT_FN (BUILT_IN_COSH):
- CASE_FLT_FN (BUILT_IN_ERFC):
- CASE_FLT_FN (BUILT_IN_EXP):
- CASE_FLT_FN (BUILT_IN_EXP10):
- CASE_FLT_FN (BUILT_IN_EXP2):
- CASE_FLT_FN (BUILT_IN_FABS):
- CASE_FLT_FN (BUILT_IN_FDIM):
- CASE_FLT_FN (BUILT_IN_HYPOT):
- CASE_FLT_FN (BUILT_IN_POW10):
- CASE_INT_FN (BUILT_IN_FFS):
- CASE_INT_FN (BUILT_IN_PARITY):
- CASE_INT_FN (BUILT_IN_POPCOUNT):
- case BUILT_IN_BSWAP32:
- case BUILT_IN_BSWAP64:
- /* Always true. */
- return true;
+ 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;
- CASE_FLT_FN (BUILT_IN_SQRT):
- /* sqrt(-0.0) is -0.0. */
- if (!HONOR_SIGNED_ZEROS (TYPE_MODE (TREE_TYPE (t))))
- return true;
- return tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p);
-
- CASE_FLT_FN (BUILT_IN_ASINH):
- CASE_FLT_FN (BUILT_IN_ATAN):
- CASE_FLT_FN (BUILT_IN_ATANH):
- CASE_FLT_FN (BUILT_IN_CBRT):
- CASE_FLT_FN (BUILT_IN_CEIL):
- CASE_FLT_FN (BUILT_IN_ERF):
- CASE_FLT_FN (BUILT_IN_EXPM1):
- CASE_FLT_FN (BUILT_IN_FLOOR):
- CASE_FLT_FN (BUILT_IN_FMOD):
- CASE_FLT_FN (BUILT_IN_FREXP):
- CASE_FLT_FN (BUILT_IN_LCEIL):
- CASE_FLT_FN (BUILT_IN_LDEXP):
- CASE_FLT_FN (BUILT_IN_LFLOOR):
- CASE_FLT_FN (BUILT_IN_LLCEIL):
- CASE_FLT_FN (BUILT_IN_LLFLOOR):
- CASE_FLT_FN (BUILT_IN_LLRINT):
- CASE_FLT_FN (BUILT_IN_LLROUND):
- CASE_FLT_FN (BUILT_IN_LRINT):
- CASE_FLT_FN (BUILT_IN_LROUND):
- CASE_FLT_FN (BUILT_IN_MODF):
- CASE_FLT_FN (BUILT_IN_NEARBYINT):
- CASE_FLT_FN (BUILT_IN_RINT):
- CASE_FLT_FN (BUILT_IN_ROUND):
- CASE_FLT_FN (BUILT_IN_SCALB):
- CASE_FLT_FN (BUILT_IN_SCALBLN):
- CASE_FLT_FN (BUILT_IN_SCALBN):
- CASE_FLT_FN (BUILT_IN_SIGNBIT):
- CASE_FLT_FN (BUILT_IN_SIGNIFICAND):
- CASE_FLT_FN (BUILT_IN_SINH):
- CASE_FLT_FN (BUILT_IN_TANH):
- CASE_FLT_FN (BUILT_IN_TRUNC):
- /* True if the 1st argument is nonnegative. */
- return tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p);
-
- CASE_FLT_FN (BUILT_IN_FMAX):
- /* True if the 1st OR 2nd arguments are nonnegative. */
- return (tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p)
- || (tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 1),
- strict_overflow_p)));
-
- CASE_FLT_FN (BUILT_IN_FMIN):
- /* True if the 1st AND 2nd arguments are nonnegative. */
- return (tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p)
- && (tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 1),
- strict_overflow_p)));
-
- CASE_FLT_FN (BUILT_IN_COPYSIGN):
- /* True if the 2nd argument is nonnegative. */
- return tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 1),
- strict_overflow_p);
-
- CASE_FLT_FN (BUILT_IN_POWI):
- /* True if the 1st argument is nonnegative or the second
- argument is an even integer. */
- if (TREE_CODE (CALL_EXPR_ARG (t, 1)) == INTEGER_CST)
- {
- tree arg1 = CALL_EXPR_ARG (t, 1);
- if ((TREE_INT_CST_LOW (arg1) & 1) == 0)
- return true;
- }
- return tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p);
-
- CASE_FLT_FN (BUILT_IN_POW):
- /* True if the 1st argument is nonnegative or the second
- argument is an even integer valued real. */
- if (TREE_CODE (CALL_EXPR_ARG (t, 1)) == REAL_CST)
- {
- REAL_VALUE_TYPE c;
- HOST_WIDE_INT n;
-
- c = TREE_REAL_CST (CALL_EXPR_ARG (t, 1));
- n = real_to_integer (&c);
- if ((n & 1) == 0)
- {
- REAL_VALUE_TYPE cint;
- real_from_integer (&cint, VOIDmode, n,
- n < 0 ? -1 : 0, 0);
- if (real_identical (&c, &cint))
- return true;
- }
- }
- return tree_expr_nonnegative_warnv_p (CALL_EXPR_ARG (t, 0),
- strict_overflow_p);
-
- default:
- break;
- }
- return tree_simple_nonnegative_warnv_p (TREE_CODE (t),
- TREE_TYPE (t));
+ return tree_call_nonnegative_warnv_p (TREE_CODE (t),
+ TREE_TYPE (t),
+ get_callee_fndecl (t),
+ arg0,
+ arg1,
+ strict_overflow_p);
}
- break;
-
case COMPOUND_EXPR:
case MODIFY_EXPR:
case GIMPLE_MODIFY_STMT:
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