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11972 resync smatch
@@ -2,38 +2,40 @@
#define LINEARIZE_H
#include "lib.h"
#include "allocate.h"
#include "token.h"
+#include "opcode.h"
#include "parse.h"
#include "symbol.h"
+#include "ptrmap.h"
struct instruction;
-DECLARE_PTR_LIST(pseudo_ptr_list, pseudo_t);
struct pseudo_user {
struct instruction *insn;
pseudo_t *userp;
};
DECLARE_ALLOCATOR(pseudo_user);
DECLARE_PTR_LIST(pseudo_user_list, struct pseudo_user);
+DECLARE_PTRMAP(phi_map, struct symbol *, pseudo_t);
enum pseudo_type {
PSEUDO_VOID,
+ PSEUDO_UNDEF,
PSEUDO_REG,
PSEUDO_SYM,
PSEUDO_VAL,
PSEUDO_ARG,
PSEUDO_PHI,
};
struct pseudo {
int nr;
- int size:16; /* OP_SETVAL only */
- enum pseudo_type type:8;
+ enum pseudo_type type;
struct pseudo_user_list *users;
struct ident *ident;
union {
struct symbol *sym;
struct instruction *def;
@@ -44,13 +46,24 @@
extern struct pseudo void_pseudo;
#define VOID (&void_pseudo)
+static inline bool is_zero(pseudo_t pseudo)
+{
+ return pseudo->type == PSEUDO_VAL && pseudo->value == 0;
+}
+
+static inline bool is_nonzero(pseudo_t pseudo)
+{
+ return pseudo->type == PSEUDO_VAL && pseudo->value != 0;
+}
+
+
struct multijmp {
struct basic_block *target;
- int begin, end;
+ long long begin, end;
};
struct asm_constraint {
pseudo_t pseudo;
const char *constraint;
@@ -67,56 +80,64 @@
};
DECLARE_ALLOCATOR(asm_rules);
struct instruction {
- unsigned opcode:8,
+ unsigned opcode:7,
+ tainted:1,
size:24;
struct basic_block *bb;
struct position pos;
struct symbol *type;
- union {
pseudo_t target;
- pseudo_t cond; /* for branch and switch */
- };
union {
struct /* entrypoint */ {
struct pseudo_list *arg_list;
};
struct /* branch */ {
+ pseudo_t cond;
struct basic_block *bb_true, *bb_false;
};
struct /* switch */ {
+ pseudo_t _cond;
struct multijmp_list *multijmp_list;
};
struct /* phi_node */ {
+ pseudo_t phi_var; // used for SSA conversion
struct pseudo_list *phi_list;
+ unsigned int used:1;
};
struct /* phi source */ {
pseudo_t phi_src;
struct instruction_list *phi_users;
};
struct /* unops */ {
pseudo_t src;
struct symbol *orig_type; /* casts */
- unsigned int offset; /* memops */
};
+ struct /* memops */ {
+ pseudo_t addr; /* alias .src */
+ unsigned int offset;
+ unsigned int is_volatile:1;
+ };
struct /* binops and sel */ {
pseudo_t src1, src2, src3;
};
struct /* slice */ {
pseudo_t base;
unsigned from, len;
};
struct /* setval */ {
- pseudo_t symbol; /* Subtle: same offset as "src" !! */
struct expression *val;
};
+ struct /* setfval */ {
+ long double fvalue;
+ };
struct /* call */ {
pseudo_t func;
struct pseudo_list *arguments;
- struct symbol *fntype;
+ struct symbol_list *fntypes;
};
struct /* context */ {
int increment;
int check;
struct expression *context_expr;
@@ -126,121 +147,44 @@
struct asm_rules *asm_rules;
};
};
};
-enum opcode {
- OP_BADOP,
-
- /* Entry */
- OP_ENTRY,
-
- /* Terminator */
- OP_TERMINATOR,
- OP_RET = OP_TERMINATOR,
- OP_BR,
- OP_CBR,
- OP_SWITCH,
- OP_INVOKE,
- OP_COMPUTEDGOTO,
- OP_UNWIND,
- OP_TERMINATOR_END = OP_UNWIND,
-
- /* Binary */
- OP_BINARY,
- OP_ADD = OP_BINARY,
- OP_SUB,
- OP_MULU, OP_MULS,
- OP_DIVU, OP_DIVS,
- OP_MODU, OP_MODS,
- OP_SHL,
- OP_LSR, OP_ASR,
-
- /* Logical */
- OP_AND,
- OP_OR,
- OP_XOR,
- OP_AND_BOOL,
- OP_OR_BOOL,
- OP_BINARY_END = OP_OR_BOOL,
-
- /* Binary comparison */
- OP_BINCMP,
- OP_SET_EQ = OP_BINCMP,
- OP_SET_NE,
- OP_SET_LE,
- OP_SET_GE,
- OP_SET_LT,
- OP_SET_GT,
- OP_SET_B,
- OP_SET_A,
- OP_SET_BE,
- OP_SET_AE,
- OP_BINCMP_END = OP_SET_AE,
-
- /* Uni */
- OP_NOT,
- OP_NEG,
-
- /* Select - three input values */
- OP_SEL,
-
- /* Memory */
- OP_MALLOC,
- OP_FREE,
- OP_ALLOCA,
- OP_LOAD,
- OP_STORE,
- OP_SETVAL,
- OP_SYMADDR,
- OP_GET_ELEMENT_PTR,
-
- /* Other */
- OP_PHI,
- OP_PHISOURCE,
- OP_CAST,
- OP_SCAST,
- OP_FPCAST,
- OP_PTRCAST,
- OP_INLINED_CALL,
- OP_CALL,
- OP_VANEXT,
- OP_VAARG,
- OP_SLICE,
- OP_SNOP,
- OP_LNOP,
- OP_NOP,
- OP_DEATHNOTE,
- OP_ASM,
-
- /* Sparse tagging (line numbers, context, whatever) */
- OP_CONTEXT,
- OP_RANGE,
-
- /* Needed to translate SSA back to normal form */
- OP_COPY,
-};
-
struct basic_block_list;
struct instruction_list;
struct basic_block {
struct position pos;
unsigned long generation;
+ union {
int context;
+ int postorder_nr; /* postorder number */
+ int dom_level; /* level in the dominance tree */
+ };
struct entrypoint *ep;
struct basic_block_list *parents; /* sources */
struct basic_block_list *children; /* destinations */
struct instruction_list *insns; /* Linear list of instructions */
+ struct basic_block *idom; /* link to the immediate dominator */
+ struct basic_block_list *doms; /* list of BB idominated by this one */
+ struct phi_map *phi_map;
struct pseudo_list *needs, *defines;
union {
unsigned int nr; /* unique id for label's names */
void *priv;
};
};
+//
+// return the opcode of the instruction defining ``SRC`` if existing
+// and OP_BADOP if not. It also assigns the defining instruction
+// to ``DEF``.
+#define DEF_OPCODE(DEF, SRC) \
+ (((SRC)->type == PSEUDO_REG && (DEF = (SRC)->def)) ? DEF->opcode : OP_BADOP)
+
+
static inline void add_bb(struct basic_block_list **list, struct basic_block *bb)
{
add_ptr_list(list, bb);
}
@@ -262,10 +206,15 @@
static inline int remove_pseudo(struct pseudo_list **list, pseudo_t pseudo)
{
return delete_ptr_list_entry((struct ptr_list **)list, pseudo, 0) != 0;
}
+static inline int pseudo_in_list(struct pseudo_list *list, pseudo_t pseudo)
+{
+ return lookup_ptr_list_entry((struct ptr_list *)list, pseudo);
+}
+
static inline int bb_terminated(struct basic_block *bb)
{
struct instruction *insn;
if (!bb)
return 0;
@@ -277,25 +226,51 @@
static inline int bb_reachable(struct basic_block *bb)
{
return bb != NULL;
}
-static inline void add_pseudo_ptr(pseudo_t *ptr, struct pseudo_ptr_list **list)
+static inline int lookup_bb(struct basic_block_list *list, struct basic_block *bb)
{
- add_ptr_list(list, ptr);
+ return lookup_ptr_list_entry((struct ptr_list *)list, bb);
}
+
static inline void add_pseudo_user_ptr(struct pseudo_user *user, struct pseudo_user_list **list)
{
add_ptr_list(list, user);
}
static inline int has_use_list(pseudo_t p)
{
- return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_VAL);
+ return (p && p->type != PSEUDO_VOID && p->type != PSEUDO_UNDEF && p->type != PSEUDO_VAL);
}
+static inline int pseudo_user_list_size(struct pseudo_user_list *list)
+{
+ return ptr_list_size((struct ptr_list *)list);
+}
+
+static inline bool pseudo_user_list_empty(struct pseudo_user_list *list)
+{
+ return ptr_list_empty((struct ptr_list *)list);
+}
+
+static inline int has_users(pseudo_t p)
+{
+ return !pseudo_user_list_empty(p->users);
+}
+
+static inline bool multi_users(pseudo_t p)
+{
+ return ptr_list_multiple((struct ptr_list *)(p->users));
+}
+
+static inline int nbr_users(pseudo_t p)
+{
+ return pseudo_user_list_size(p->users);
+}
+
static inline struct pseudo_user *alloc_pseudo_user(struct instruction *insn, pseudo_t *pp)
{
struct pseudo_user *user = __alloc_pseudo_user(0);
user->userp = pp;
user->insn = insn;
@@ -325,24 +300,31 @@
struct symbol_list *syms;
struct pseudo_list *accesses;
struct basic_block_list *bbs;
struct basic_block *active;
struct instruction *entry;
+ unsigned int dom_levels; /* max levels in the dom tree */
};
extern void insert_select(struct basic_block *bb, struct instruction *br, struct instruction *phi, pseudo_t if_true, pseudo_t if_false);
extern void insert_branch(struct basic_block *bb, struct instruction *br, struct basic_block *target);
-pseudo_t alloc_phi(struct basic_block *source, pseudo_t pseudo, int size);
+struct instruction *alloc_phisrc(pseudo_t pseudo, struct symbol *type);
+struct instruction *alloc_phi_node(struct basic_block *bb, struct symbol *type, struct ident *ident);
+struct instruction *insert_phi_node(struct basic_block *bb, struct symbol *var);
+void add_phi_node(struct basic_block *bb, struct instruction *phi_node);
+
+pseudo_t alloc_phi(struct basic_block *source, pseudo_t pseudo, struct symbol *type);
pseudo_t alloc_pseudo(struct instruction *def);
-pseudo_t value_pseudo(struct symbol *type, long long val);
-unsigned int value_size(long long value);
+pseudo_t value_pseudo(long long val);
+pseudo_t undef_pseudo(void);
struct entrypoint *linearize_symbol(struct symbol *sym);
int unssa(struct entrypoint *ep);
void show_entry(struct entrypoint *ep);
const char *show_pseudo(pseudo_t pseudo);
void show_bb(struct basic_block *bb);
const char *show_instruction(struct instruction *insn);
+const char *show_label(struct basic_block *bb);
#endif /* LINEARIZE_H */