scan.h

   1 #include <map>
   2
   3 #include <clang/Basic/SourceManager.h>
   4 #include <clang/AST/Decl.h>
   5 #include <clang/AST/Stmt.h>
   6 #include <clang/Lex/Preprocessor.h>
   7
   8 #include <isl/ctx.h>
   9 #include <isl/map.h>
  10 #include <isl/val.h>
  11
  12 #include "scop.h"
  13
  14 /* The location of the scop, as delimited by scop and endscop
  15  * pragmas by the user.
  16  */
  17 struct ScopLoc {
  18         ScopLoc() : end(0) {}
  19
  20         unsigned start;
  21         unsigned end;
  22 };
  23
  24 struct PetScan {
  25         clang::Preprocessor &PP;
  26         clang::ASTContext &ast_context;
  27         /* If autodetect is false, then loc contains the location
  28          * of the scop to be extracted.
  29          */
  30         ScopLoc &loc;
  31         isl_ctx *ctx;
  32         pet_options *options;
  33         /* The sequence number of the next statement. */
  34         int n_stmt;
  35         /* The sequence number of the next virtual scalar. */
  36         int n_test;
  37         /* Set if the pet_scop returned by an extract method only
  38          * represents part of the input tree.
  39          */
  40         bool partial;
  41         /* Set is nested accesses are allowed in general.
  42          * This currently defaults to true.
  43          */
  44         bool allow_nested;
  45         /* Set if nested accesses are allowed in that part of the tree
  46          * that is currently under investigation.
  47          */
  48         bool nesting_enabled;
  49         /* Maps identifiers to the last value that was assigned to them.
  50          * If an identifier is mapped to NULL, then something may have
  51          * been assigned, but we don't know what.
  52          * assigned_value does not take a reference to the isl_pw_aff
  53          * object, so each such isl_pw_aff needs to be stored in
  54          * the set of "expressions".
  55          */
  56         std::map<clang::ValueDecl *, isl_pw_aff *> assigned_value;
  57         /* A collection of isl_pw_affs used in assigned_value or other
  58          * temporary maps.  expressions holds a reference for each
  59          * isl_pw_aff, which is freed in the destructor of PetScan.
  60          */
  61         std::set<isl_pw_aff *> expressions;
  62
  63         /* A union of mappings of the form
  64          *      { identifier[] -> [i] : lower_bound <= i <= upper_bound }
  65          */
  66         isl_union_map *value_bounds;
  67
  68         PetScan(clang::Preprocessor &PP,
  69                 clang::ASTContext &ast_context, ScopLoc &loc,
  70                 pet_options *options, __isl_take isl_union_map *value_bounds) :
  71                 ctx(isl_union_map_get_ctx(value_bounds)), PP(PP),
  72                 ast_context(ast_context), loc(loc),
  73                 options(options), value_bounds(value_bounds),
  74                 n_stmt(0), n_test(0), partial(0), allow_nested(true),
  75                 nesting_enabled(false) { }
  76
  77         ~PetScan();
  78
  79         struct pet_scop *scan(clang::FunctionDecl *fd);
  80
  81         static __isl_give isl_val *extract_int(isl_ctx *ctx,
  82                 clang::IntegerLiteral *expr);
  83         static __isl_give isl_val *extract_unsigned(isl_ctx *ctx,
  84                 const llvm::APInt &val);
  85 private:
  86         void assign(struct pet_expr *lhs, clang::Expr *rhs);
  87
  88         __isl_give isl_pw_aff *signed_overflow(__isl_take isl_pw_aff *pa,
  89                 unsigned width);
  90         void insert_expression(__isl_take isl_pw_aff *expr);
  91         struct pet_scop *scan(clang::Stmt *stmt);
  92
  93         struct pet_scop *scan_arrays(struct pet_scop *scop);
  94         struct pet_array *extract_array(isl_ctx *ctx, clang::ValueDecl *decl);
  95         struct pet_array *set_upper_bounds(struct pet_array *array,
  96                 const clang::Type *type, int pos);
  97
  98         struct pet_scop *extract_non_affine_condition(clang::Expr *cond,
  99                 __isl_take isl_map *access);
 100
 101         struct pet_scop *extract_conditional_assignment(clang::IfStmt *stmt);
 102         struct pet_scop *extract_non_affine_if(clang::Expr *cond,
 103                 struct pet_scop *scop_then, struct pet_scop *scop_else,
 104                 bool have_else, int stmt_id);
 105
 106         struct pet_scop *kill(clang::Stmt *stmt, struct pet_array *array);
 107
 108         struct pet_scop *extract(clang::Stmt *stmt,
 109                 bool skip_declarations = false);
 110         struct pet_scop *extract(clang::StmtRange stmt_range, bool block,
 111                 bool skip_declarations);
 112         struct pet_scop *extract(clang::IfStmt *stmt);
 113         struct pet_scop *extract(clang::WhileStmt *stmt);
 114         struct pet_scop *extract(clang::CompoundStmt *stmt,
 115                 bool skip_declarations = false);
 116         struct pet_scop *extract(clang::LabelStmt *stmt);
 117         struct pet_scop *extract(clang::ContinueStmt *stmt);
 118         struct pet_scop *extract(clang::BreakStmt *stmt);
 119         struct pet_scop *extract(clang::DeclStmt *expr);
 120
 121         struct pet_scop *extract(clang::Stmt *stmt, struct pet_expr *expr,
 122                                 __isl_take isl_id *label = NULL);
 123         struct pet_stmt *extract_kill(struct pet_scop *scop);
 124
 125         clang::BinaryOperator *initialization_assignment(clang::Stmt *init);
 126         clang::Decl *initialization_declaration(clang::Stmt *init);
 127         clang::ValueDecl *extract_induction_variable(clang::BinaryOperator *stmt);
 128         clang::VarDecl *extract_induction_variable(clang::Stmt *init,
 129                                 clang::Decl *stmt);
 130         __isl_give isl_pw_aff *extract_unary_increment(clang::UnaryOperator *op,
 131                                 clang::ValueDecl *iv);
 132         __isl_give isl_pw_aff *extract_binary_increment(
 133                                 clang::BinaryOperator *op,
 134                                 clang::ValueDecl *iv);
 135         __isl_give isl_pw_aff *extract_compound_increment(
 136                                 clang::CompoundAssignOperator *op,
 137                                 clang::ValueDecl *iv);
 138         __isl_give isl_pw_aff *extract_increment(clang::ForStmt *stmt,
 139                                 clang::ValueDecl *iv);
 140         struct pet_scop *extract_for(clang::ForStmt *stmt);
 141         struct pet_scop *extract_infinite_loop(clang::Stmt *body);
 142         struct pet_scop *extract_infinite_for(clang::ForStmt *stmt);
 143         struct pet_scop *extract_affine_while(__isl_take isl_pw_aff *pa,
 144                                 clang::Stmt *body);
 145
 146         void mark_write(struct pet_expr *access);
 147         struct pet_expr *extract_expr(clang::Expr *expr);
 148         struct pet_expr *extract_expr(clang::UnaryOperator *expr);
 149         struct pet_expr *extract_expr(clang::BinaryOperator *expr);
 150         struct pet_expr *extract_expr(clang::ImplicitCastExpr *expr);
 151         struct pet_expr *extract_expr(clang::FloatingLiteral *expr);
 152         struct pet_expr *extract_expr(clang::ParenExpr *expr);
 153         struct pet_expr *extract_expr(clang::ConditionalOperator *expr);
 154         struct pet_expr *extract_expr(clang::CallExpr *expr);
 155         struct pet_expr *extract_expr(clang::CStyleCastExpr *expr);
 156
 157         int extract_nested(__isl_keep isl_space *space,
 158                 int n_arg, struct pet_expr **args,
 159                 std::map<int,int> &param2pos);
 160         struct pet_expr *extract_nested(struct pet_expr *expr, int n,
 161                 std::map<int,int> &param2pos);
 162         struct pet_stmt *extract_nested(struct pet_stmt *stmt, int n,
 163                 std::map<int,int> &param2pos);
 164         struct pet_expr *resolve_nested(struct pet_expr *expr);
 165         struct pet_scop *resolve_nested(struct pet_scop *scop);
 166         struct pet_stmt *resolve_nested(struct pet_stmt *stmt);
 167         struct pet_expr *extract_access_expr(clang::Expr *expr);
 168
 169         __isl_give isl_map *extract_access(clang::ArraySubscriptExpr *expr);
 170         __isl_give isl_map *extract_access(clang::Expr *expr);
 171         __isl_give isl_map *extract_access(clang::ImplicitCastExpr *expr);
 172         __isl_give isl_map *extract_access(clang::DeclRefExpr *expr);
 173         __isl_give isl_map *extract_access(clang::ValueDecl *decl);
 174         __isl_give isl_map *extract_access(clang::IntegerLiteral *expr);
 175
 176         __isl_give isl_val *extract_int(clang::Expr *expr);
 177         __isl_give isl_val *extract_int(clang::ParenExpr *expr);
 178
 179         __isl_give isl_pw_aff *extract_affine_add(clang::BinaryOperator *expr);
 180         __isl_give isl_pw_aff *extract_affine_div(clang::BinaryOperator *expr);
 181         __isl_give isl_pw_aff *extract_affine_mod(clang::BinaryOperator *expr);
 182         __isl_give isl_pw_aff *extract_affine_mul(clang::BinaryOperator *expr);
 183
 184         isl_pw_aff *nested_access(clang::Expr *expr);
 185
 186         __isl_give isl_pw_aff *try_extract_affine(clang::Expr *expr);
 187         bool is_affine(clang::Expr *expr);
 188         __isl_give isl_pw_aff *try_extract_affine_condition(clang::Expr *expr);
 189         bool is_affine_condition(clang::Expr *expr);
 190         __isl_give isl_pw_aff *try_extract_nested_condition(clang::Expr *expr);
 191         bool is_nested_allowed(__isl_keep isl_pw_aff *pa, pet_scop *scop);
 192
 193         __isl_give isl_pw_aff *extract_affine(const llvm::APInt &val);
 194         __isl_give isl_pw_aff *extract_affine(clang::Expr *expr);
 195         __isl_give isl_pw_aff *extract_affine(clang::IntegerLiteral *expr);
 196         __isl_give isl_pw_aff *extract_affine(clang::ImplicitCastExpr *expr);
 197         __isl_give isl_pw_aff *extract_affine(clang::DeclRefExpr *expr);
 198         __isl_give isl_pw_aff *extract_affine(clang::BinaryOperator *expr);
 199         __isl_give isl_pw_aff *extract_affine(clang::UnaryOperator *expr);
 200         __isl_give isl_pw_aff *extract_affine(clang::ParenExpr *expr);
 201         __isl_give isl_pw_aff *extract_affine(clang::CallExpr *expr);
 202         __isl_give isl_pw_aff *extract_affine(clang::ArraySubscriptExpr *expr);
 203         __isl_give isl_pw_aff *extract_affine(clang::ConditionalOperator *expr);
 204
 205         __isl_give isl_pw_aff *extract_implicit_condition(clang::Expr *expr);
 206
 207         __isl_give isl_pw_aff *extract_condition(clang::UnaryOperator *expr);
 208         __isl_give isl_pw_aff *extract_condition(clang::Expr *expr);
 209         __isl_give isl_pw_aff *extract_comparison(clang::BinaryOperator *expr);
 210         __isl_give isl_pw_aff *extract_comparison(clang::BinaryOperatorKind op,
 211                 clang::Expr *LHS, clang::Expr *RHS, clang::Stmt *comp);
 212         __isl_give isl_pw_aff *extract_boolean(clang::BinaryOperator *expr);
 213         __isl_give isl_pw_aff *extract_boolean(clang::UnaryOperator *expr);
 214
 215         void unsupported(clang::Stmt *stmt, const char *msg = NULL);
 216 };