scan.h

   1 #ifndef PET_SCAN_H
   2 #define PET_SCAN_H
   3
   4 #include <set>
   5 #include <map>
   6
   7 #include <clang/Basic/SourceManager.h>
   8 #include <clang/AST/Decl.h>
   9 #include <clang/AST/Stmt.h>
  10 #include <clang/Lex/Preprocessor.h>
  11
  12 #include <isl/ctx.h>
  13 #include <isl/map.h>
  14 #include <isl/val.h>
  15
  16 #include "context.h"
  17 #include "inliner.h"
  18 #include "isl_id_to_pet_expr.h"
  19 #include "loc.h"
  20 #include "scop.h"
  21 #include "summary.h"
  22 #include "tree.h"
  23
  24 namespace clang {
  25
  26 #ifndef HAVE_STMTRANGE
  27 /* StmtRange was replaced by iterator_range in more recent versions of clang.
  28  * Implement a StmtRange in terms of this iterator_range if StmtRange
  29  * is not available.
  30  */
  31 struct StmtRange : std::pair<StmtIterator,StmtIterator> {
  32         StmtRange(const StmtIterator &begin, const StmtIterator &end) :
  33                 std::pair<StmtIterator,StmtIterator>(begin, end) {}
  34         StmtRange(Stmt::child_range range) :
  35                 std::pair<StmtIterator,StmtIterator>(range.begin(),
  36                                                         range.end()) {}
  37 };
  38 #endif
  39
  40 }
  41
  42 /* The location of the scop, as delimited by scop and endscop
  43  * pragmas by the user.
  44  * "scop" and "endscop" are the source locations of the scop and
  45  * endscop pragmas.
  46  * "start_line" is the line number of the start position.
  47  */
  48 struct ScopLoc {
  49         ScopLoc() : end(0) {}
  50
  51         clang::SourceLocation scop;
  52         clang::SourceLocation endscop;
  53         unsigned start_line;
  54         unsigned start;
  55         unsigned end;
  56 };
  57
  58 /* The information extracted from a pragma pencil independent.
  59  * We currently only keep track of the line number where
  60  * the pragma appears.
  61  */
  62 struct Independent {
  63         Independent(unsigned line) : line(line) {}
  64
  65         unsigned line;
  66 };
  67
  68 /* Compare two TypeDecl pointers based on their names.
  69  */
  70 struct less_name {
  71         bool operator()(const clang::TypeDecl *x,
  72                         const clang::TypeDecl *y) {
  73                 return x->getNameAsString().compare(y->getNameAsString()) < 0;
  74         }
  75 };
  76
  77 /* The PetTypes structure collects a set of RecordDecl and
  78  * TypedefNameDecl pointers.
  79  * The pointers are sorted using a fixed order.  The actual order
  80  * is not important, only that it is consistent across platforms.
  81  */
  82 struct PetTypes {
  83         std::set<clang::RecordDecl *, less_name> records;
  84         std::set<clang::TypedefNameDecl *, less_name> typedefs;
  85
  86         void insert(clang::RecordDecl *decl) {
  87                 records.insert(decl);
  88         }
  89         void insert(clang::TypedefNameDecl *decl) {
  90                 typedefs.insert(decl);
  91         }
  92 };
  93
  94 struct PetScan {
  95         clang::Preprocessor &PP;
  96         clang::ASTContext &ast_context;
  97         /* The DeclContext of the function containing the scop.
  98          */
  99         clang::DeclContext *decl_context;
 100         /* If autodetect is false, then loc contains the location
 101          * of the scop to be extracted.
 102          */
 103         ScopLoc &loc;
 104         isl_ctx *ctx;
 105         pet_options *options;
 106         /* If not NULL, then return_root represents the compound statement
 107          * in which a return statement is allowed as the final child.
 108          * If return_root is NULL, then no return statements are allowed.
 109          */
 110         clang::Stmt *return_root;
 111         /* Set if the pet_scop returned by an extract method only
 112          * represents part of the input tree.
 113          */
 114         bool partial;
 115
 116         /* A cache of size expressions for array identifiers as computed
 117          * by PetScan::get_array_size, or set by PetScan::set_array_size.
 118          */
 119         isl_id_to_pet_expr *id_size;
 120         /* A cache of size expressions for array types as computed
 121          * by PetScan::get_array_size.
 122          */
 123         std::map<const clang::Type *, pet_expr *> type_size;
 124
 125         /* A cache of funtion summaries for function declarations
 126          * as extracted by PetScan::get_summary.
 127          */
 128         std::map<clang::FunctionDecl *, pet_function_summary *> summary_cache;
 129
 130         /* A union of mappings of the form
 131          *      { identifier[] -> [i] : lower_bound <= i <= upper_bound }
 132          */
 133         isl_union_map *value_bounds;
 134
 135         /* The line number of the previously considered Stmt. */
 136         unsigned last_line;
 137         /* The line number of the Stmt currently being considered. */
 138         unsigned current_line;
 139         /* Information about the independent pragmas in the source code. */
 140         std::vector<Independent> &independent;
 141
 142         /* All variables that have already been declared
 143          * in the current compound statement.
 144          */
 145         std::vector<clang::VarDecl *> declarations;
 146         /* Sequence number of the next rename. */
 147         int n_rename;
 148         /* Have the declared names been collected? */
 149         bool declared_names_collected;
 150         /* The names of the variables declared in decl_context,
 151          * if declared_names_collected is set.
 152          */
 153         std::set<std::string> declared_names;
 154         /* A set of names known to be in use. */
 155         std::set<std::string> used_names;
 156
 157         /* If not NULL, then "call2id" maps inlined call expressions
 158          * that return a value to the corresponding variables.
 159          */
 160         std::map<clang::Stmt *, isl_id *> *call2id;
 161
 162         /* Sequence number of the next temporary inlined argument variable. */
 163         int n_arg;
 164         /* Sequence number of the next temporary inlined return variable. */
 165         int n_ret;
 166
 167         PetScan(clang::Preprocessor &PP, clang::ASTContext &ast_context,
 168                 clang::DeclContext *decl_context, ScopLoc &loc,
 169                 pet_options *options, __isl_take isl_union_map *value_bounds,
 170                 std::vector<Independent> &independent) :
 171                 PP(PP),
 172                 ast_context(ast_context), decl_context(decl_context), loc(loc),
 173                 ctx(isl_union_map_get_ctx(value_bounds)),
 174                 options(options), return_root(NULL), partial(false),
 175                 value_bounds(value_bounds), last_line(0), current_line(0),
 176                 independent(independent), n_rename(0),
 177                 declared_names_collected(false), call2id(NULL),
 178                 n_arg(0), n_ret(0) {
 179                 id_size = isl_id_to_pet_expr_alloc(ctx, 0);
 180         }
 181
 182         ~PetScan();
 183
 184         struct pet_scop *scan(clang::FunctionDecl *fd);
 185
 186         static __isl_give isl_val *extract_int(isl_ctx *ctx,
 187                 clang::IntegerLiteral *expr);
 188         __isl_give pet_expr *get_array_size(__isl_keep isl_id *id);
 189         void set_array_size(__isl_take isl_id *id, __isl_take pet_expr *size);
 190         struct pet_array *extract_array(__isl_keep isl_id *id,
 191                 PetTypes *types, __isl_keep pet_context *pc);
 192         __isl_give pet_tree *extract_inlined_call(clang::CallExpr *call,
 193                 clang::FunctionDecl *fd, __isl_keep isl_id *return_id);
 194 private:
 195         void set_current_stmt(clang::Stmt *stmt);
 196         bool is_current_stmt_marked_independent();
 197
 198         void collect_declared_names();
 199         void add_new_used_names(const std::set<std::string> &used_names);
 200         bool name_in_use(const std::string &name, clang::Decl *decl);
 201         std::string generate_new_name(const std::string &name);
 202
 203         __isl_give pet_tree *add_kills(__isl_take pet_tree *tree,
 204                 std::set<clang::ValueDecl *> locals);
 205
 206         struct pet_scop *scan(clang::Stmt *stmt);
 207
 208         struct pet_scop *scan_arrays(struct pet_scop *scop,
 209                 __isl_keep pet_context *pc);
 210         struct pet_array *extract_array(clang::ValueDecl *decl,
 211                 PetTypes *types, __isl_keep pet_context *pc);
 212         struct pet_array *extract_array(__isl_keep isl_id_list *decls,
 213                 PetTypes *types, __isl_keep pet_context *pc);
 214         __isl_give pet_expr *set_upper_bounds(__isl_take pet_expr *expr,
 215                 clang::QualType qt, int pos);
 216         struct pet_array *set_upper_bounds(struct pet_array *array,
 217                 __isl_keep pet_context *pc);
 218         int substitute_array_sizes(__isl_keep pet_tree *tree,
 219                 pet_substituter *substituter);
 220
 221         __isl_give pet_tree *insert_initial_declarations(
 222                 __isl_take pet_tree *tree, int n_decl,
 223                 clang::StmtRange stmt_range);
 224         __isl_give pet_tree *extract(clang::Stmt *stmt,
 225                 bool skip_declarations = false);
 226         __isl_give pet_tree *extract(clang::StmtRange stmt_range, bool block,
 227                 bool skip_declarations, clang::Stmt *parent);
 228         __isl_give pet_tree *extract(clang::IfStmt *stmt);
 229         __isl_give pet_tree *extract(clang::WhileStmt *stmt);
 230         __isl_give pet_tree *extract(clang::CompoundStmt *stmt,
 231                 bool skip_declarations = false);
 232         __isl_give pet_tree *extract(clang::LabelStmt *stmt);
 233         __isl_give pet_tree *extract(clang::Decl *decl);
 234         __isl_give pet_tree *extract(clang::DeclStmt *expr);
 235         __isl_give pet_tree *extract(clang::ReturnStmt *stmt);
 236
 237         __isl_give pet_loc *construct_pet_loc(clang::SourceRange range,
 238                 bool skip_semi);
 239         __isl_give pet_tree *extract(__isl_take pet_expr *expr,
 240                 clang::SourceRange range, bool skip_semi);
 241         __isl_give pet_tree *update_loc(__isl_take pet_tree *tree,
 242                 clang::Stmt *stmt);
 243
 244         struct pet_scop *extract_scop(__isl_take pet_tree *tree);
 245
 246         clang::BinaryOperator *initialization_assignment(clang::Stmt *init);
 247         clang::Decl *initialization_declaration(clang::Stmt *init);
 248         clang::ValueDecl *extract_induction_variable(clang::BinaryOperator *stmt);
 249         clang::VarDecl *extract_induction_variable(clang::Stmt *init,
 250                                 clang::Decl *stmt);
 251         __isl_give pet_expr *extract_unary_increment(clang::UnaryOperator *op,
 252                                 clang::ValueDecl *iv);
 253         __isl_give pet_expr *extract_binary_increment(
 254                                 clang::BinaryOperator *op,
 255                                 clang::ValueDecl *iv);
 256         __isl_give pet_expr *extract_compound_increment(
 257                                 clang::CompoundAssignOperator *op,
 258                                 clang::ValueDecl *iv);
 259         __isl_give pet_expr *extract_increment(clang::ForStmt *stmt,
 260                                 clang::ValueDecl *iv);
 261         __isl_give pet_tree *extract_for(clang::ForStmt *stmt);
 262         __isl_give pet_tree *extract_expr_stmt(clang::Stmt *stmt);
 263         int set_inliner_arguments(pet_inliner &inliner, clang::CallExpr *call,
 264                 clang::FunctionDecl *fd);
 265
 266         __isl_give pet_expr *extract_assume(clang::Expr *expr);
 267         __isl_give pet_function_summary *get_summary(clang::FunctionDecl *fd);
 268         __isl_give pet_expr *set_summary(__isl_take pet_expr *expr,
 269                 clang::FunctionDecl *fd);
 270         __isl_give pet_expr *extract_argument(clang::FunctionDecl *fd, int pos,
 271                 clang::Expr *expr, bool detect_writes);
 272         __isl_give pet_expr *extract_expr(const llvm::APInt &val);
 273         __isl_give pet_expr *extract_expr(clang::Expr *expr);
 274         __isl_give pet_expr *extract_expr(clang::UnaryOperator *expr);
 275         __isl_give pet_expr *extract_expr(clang::BinaryOperator *expr);
 276         __isl_give pet_expr *extract_expr(clang::ImplicitCastExpr *expr);
 277         __isl_give pet_expr *extract_expr(clang::IntegerLiteral *expr);
 278         __isl_give pet_expr *extract_expr(clang::EnumConstantDecl *expr);
 279         __isl_give pet_expr *extract_expr(clang::FloatingLiteral *expr);
 280         __isl_give pet_expr *extract_expr(clang::ParenExpr *expr);
 281         __isl_give pet_expr *extract_expr(clang::ConditionalOperator *expr);
 282         __isl_give pet_expr *extract_expr(clang::CallExpr *expr);
 283         __isl_give pet_expr *extract_expr(clang::CStyleCastExpr *expr);
 284
 285         __isl_give pet_expr *extract_access_expr(clang::Expr *expr);
 286         __isl_give pet_expr *extract_access_expr(clang::ValueDecl *decl);
 287
 288         __isl_give pet_expr *extract_index_expr(
 289                 clang::ArraySubscriptExpr *expr);
 290         __isl_give pet_expr *extract_index_expr(clang::Expr *expr);
 291         __isl_give pet_expr *extract_index_expr(clang::ImplicitCastExpr *expr);
 292         __isl_give pet_expr *extract_index_expr(clang::DeclRefExpr *expr);
 293         __isl_give pet_expr *extract_index_expr(clang::ValueDecl *decl);
 294         __isl_give pet_expr *extract_index_expr(clang::MemberExpr *expr);
 295
 296         __isl_give isl_val *extract_int(clang::Expr *expr);
 297         __isl_give isl_val *extract_int(clang::ParenExpr *expr);
 298
 299         clang::FunctionDecl *find_decl_from_name(clang::CallExpr *call,
 300                 std::string name);
 301         clang::FunctionDecl *get_summary_function(clang::CallExpr *call);
 302
 303         void report(clang::SourceRange range, unsigned id);
 304         void report(clang::Stmt *stmt, unsigned id);
 305         void report(clang::Decl *decl, unsigned id);
 306         void unsupported(clang::Stmt *stmt);
 307         void report_unsupported_unary_operator(clang::Stmt *stmt);
 308         void report_unsupported_binary_operator(clang::Stmt *stmt);
 309         void report_unsupported_statement_type(clang::Stmt *stmt);
 310         void report_prototype_required(clang::Stmt *stmt);
 311         void report_missing_increment(clang::Stmt *stmt);
 312         void report_missing_summary_function(clang::Stmt *stmt);
 313         void report_missing_summary_function_body(clang::Stmt *stmt);
 314         void report_unsupported_inline_function_argument(clang::Stmt *stmt);
 315         void report_unsupported_declaration(clang::Decl *decl);
 316         void report_unbalanced_pragmas(clang::SourceLocation scop,
 317                 clang::SourceLocation endscop);
 318         void report_unsupported_return(clang::Stmt *stmt);
 319         void report_return_not_at_end_of_function(clang::Stmt *stmt);
 320 };
 321
 322 #endif