diff options
Diffstat (limited to 'gcc/tree-flow.h')
| -rw-r--r-- | gcc/tree-flow.h | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/gcc/tree-flow.h b/gcc/tree-flow.h index 92a6035..a766e39 100644 --- a/gcc/tree-flow.h +++ b/gcc/tree-flow.h @@ -92,6 +92,9 @@ struct ptr_info_def GTY(()) pointer will be represented by this memory tag, instead of the type tag computed by TBAA. */ tree name_mem_tag; + + /* Mask of reasons this pointer's value escapes the function */ + unsigned int escape_mask; }; @@ -213,6 +216,10 @@ struct var_ann_d GTY(()) /* If this variable is a structure, this fields holds a list of symbols representing each of the fields of the structure. */ subvar_t subvars; + + /* Mask of values saying the reasons why this variable has escaped + the function. */ + unsigned int escape_mask; }; struct function_ann_d GTY(()) @@ -751,9 +758,27 @@ enum move_pos }; extern enum move_pos movement_possibility (tree); +/* The reasons a variable may escape a function. */ +enum escape_type + { + NO_ESCAPE = 0, /* Doesn't escape. */ + ESCAPE_STORED_IN_GLOBAL = 1 << 1, + ESCAPE_TO_ASM = 1 << 2, /* Passed by address to an assembly + statement. */ + ESCAPE_TO_CALL = 1 << 3, /* Escapes to a function call. */ + ESCAPE_BAD_CAST = 1 << 4, /* Cast from pointer to integer */ + ESCAPE_TO_RETURN = 1 << 5, /* Returned from function. */ + ESCAPE_TO_PURE_CONST = 1 << 6, /* Escapes to a pure or constant + function call. */ + ESCAPE_IS_GLOBAL = 1 << 7, /* Is a global variable. */ + ESCAPE_IS_PARM = 1 << 8, /* Is an incoming function parameter. */ + ESCAPE_UNKNOWN = 1 << 9 /* We believe it escapes for some reason + not enumerated above. */ + }; + /* In tree-flow-inline.h */ static inline bool is_call_clobbered (tree); -static inline void mark_call_clobbered (tree); +static inline void mark_call_clobbered (tree, unsigned int); static inline void set_is_used (tree); static inline bool unmodifiable_var_p (tree); |