diff options
Diffstat (limited to 'gcc/fold-const.h')
| -rw-r--r-- | gcc/fold-const.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/gcc/fold-const.h b/gcc/fold-const.h index 54c850a3ee1..c9c5cbdae36 100644 --- a/gcc/fold-const.h +++ b/gcc/fold-const.h @@ -84,7 +84,7 @@ extern bool fold_deferring_overflow_warnings_p (void); extern void fold_overflow_warning (const char*, enum warn_strict_overflow_code); extern enum tree_code fold_div_compare (enum tree_code, tree, tree, tree *, tree *, bool *); -extern bool operand_equal_p (const_tree, const_tree, unsigned int); +extern bool operand_equal_p (const_tree, const_tree, unsigned int flags = 0); extern int multiple_of_p (tree, const_tree, const_tree); #define omit_one_operand(T1,T2,T3)\ omit_one_operand_loc (UNKNOWN_LOCATION, T1, T2, T3) @@ -212,4 +212,27 @@ extern tree fold_build_pointer_plus_hwi_loc (location_t loc, tree ptr, HOST_WIDE #define fold_build_pointer_plus_hwi(p,o) \ fold_build_pointer_plus_hwi_loc (UNKNOWN_LOCATION, p, o) + + +/* Class used to compare gimple operands. */ + +class operand_compare +{ +public: + /* Return true if two operands are equal. The flags fields can be used + to specify OEP flags described above. */ + virtual bool operand_equal_p (const_tree, const_tree, unsigned int flags); + + /* Generate a hash value for an expression. This can be used iteratively + by passing a previous result as the HSTATE argument. */ + virtual void hash_operand (const_tree, inchash::hash &, unsigned flags); + +protected: + /* Verify that when arguments (ARG0 and ARG1) are equal, then they have + an equal hash value. When the function knowns comparison return, + true is returned. Then RET is set to corresponding comparsion result. */ + bool verify_hash_value (const_tree arg0, const_tree arg1, unsigned int flags, + bool *ret); +}; + #endif // GCC_FOLD_CONST_H |