Line data    Source code

       1              : // Copyright (C) 2020-2026 Free Software Foundation, Inc.
       2              : 
       3              : // This file is part of GCC.
       4              : 
       5              : // GCC is free software; you can redistribute it and/or modify it under
       6              : // the terms of the GNU General Public License as published by the Free
       7              : // Software Foundation; either version 3, or (at your option) any later
       8              : // version.
       9              : 
      10              : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11              : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12              : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13              : // for more details.
      14              : 
      15              : // You should have received a copy of the GNU General Public License
      16              : // along with GCC; see the file COPYING3.  If not see
      17              : // <http://www.gnu.org/licenses/>.
      18              : 
      19              : #ifndef RUST_BIR_BUILDER_LAZYBOOLEXPR_H
      20              : #define RUST_BIR_BUILDER_LAZYBOOLEXPR_H
      21              : 
      22              : #include "rust-bir-builder-internal.h"
      23              : #include "rust-bir-builder-expr-stmt.h"
      24              : #include "rust-hir-expr.h"
      25              : 
      26              : namespace Rust {
      27              : namespace BIR {
      28              : 
      29              : /**
      30              :  * Special builder is needed to store short-circuiting context for directly
      31              :  * nested lazy boolean expressions.
      32              :  */
      33              : class LazyBooleanExprBuilder : public AbstractExprBuilder
      34              : {
      35              :   BasicBlockId short_circuit_bb;
      36              : 
      37              : public:
      38            0 :   explicit LazyBooleanExprBuilder (BuilderContext &ctx,
      39              :                                    PlaceId expr_return_place = INVALID_PLACE)
      40            0 :     : AbstractExprBuilder (ctx, expr_return_place),
      41            0 :       short_circuit_bb (ENTRY_BASIC_BLOCK)
      42              :   {}
      43              : 
      44            0 :   PlaceId build (HIR::LazyBooleanExpr &expr)
      45              :   {
      46            0 :     PlaceId return_place = take_or_create_return_place (lookup_type (expr));
      47              : 
      48            0 :     short_circuit_bb = new_bb ();
      49            0 :     push_assignment (return_place, visit_expr (expr), expr.get_locus ());
      50            0 :     auto final_bb = new_bb ();
      51            0 :     push_goto (final_bb);
      52              : 
      53            0 :     ctx.current_bb = short_circuit_bb;
      54            0 :     push_assignment (return_place,
      55              :                      ctx.place_db.get_constant (lookup_type (expr)),
      56              :                      expr.get_locus ());
      57            0 :     push_goto (final_bb);
      58              : 
      59            0 :     ctx.current_bb = final_bb;
      60            0 :     return return_place;
      61              :   }
      62              : 
      63              : protected:
      64            0 :   void visit (HIR::LazyBooleanExpr &expr) override
      65              :   {
      66            0 :     auto lhs = visit_expr (expr.get_lhs ());
      67            0 :     push_switch (move_place (lhs, expr.get_lhs ().get_locus ()),
      68              :                  expr.get_locus (), {short_circuit_bb});
      69              : 
      70            0 :     start_new_consecutive_bb ();
      71            0 :     return_place (visit_expr (expr.get_rhs ()), expr.get_locus ());
      72            0 :   }
      73            0 :   void visit (HIR::GroupedExpr &expr) override
      74              :   {
      75            0 :     expr.get_expr_in_parens ().accept_vis (*this);
      76            0 :   }
      77              : 
      78              : protected:
      79              : public:
      80            0 :   void visit (HIR::QualifiedPathInExpression &expr) override
      81              :   {
      82            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
      83            0 :   }
      84            0 :   void visit (HIR::PathInExpression &expr) override
      85              :   {
      86            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
      87            0 :   }
      88            0 :   void visit (HIR::ClosureExpr &expr) override
      89              :   {
      90            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
      91            0 :   }
      92            0 :   void visit (HIR::StructExprStructFields &fields) override
      93              :   {
      94            0 :     ExprStmtBuilder (ctx).build (fields);
      95            0 :   }
      96            0 :   void visit (HIR::StructExprStruct &a_struct) override
      97              :   {
      98            0 :     ExprStmtBuilder (ctx).build (a_struct);
      99            0 :   }
     100            0 :   void visit (HIR::LiteralExpr &expr) override
     101              :   {
     102            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     103            0 :   }
     104            0 :   void visit (HIR::BorrowExpr &expr) override
     105              :   {
     106            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     107            0 :   }
     108            0 :   void visit (HIR::DereferenceExpr &expr) override
     109              :   {
     110            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     111            0 :   }
     112            0 :   void visit (HIR::ErrorPropagationExpr &expr) override
     113              :   {
     114            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     115            0 :   }
     116            0 :   void visit (HIR::NegationExpr &expr) override
     117              :   {
     118            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     119            0 :   }
     120            0 :   void visit (HIR::ArithmeticOrLogicalExpr &expr) override
     121              :   {
     122            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     123            0 :   }
     124            0 :   void visit (HIR::ComparisonExpr &expr) override
     125              :   {
     126            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     127            0 :   }
     128            0 :   void visit (HIR::TypeCastExpr &expr) override
     129              :   {
     130            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     131            0 :   }
     132            0 :   void visit (HIR::AssignmentExpr &expr) override
     133              :   {
     134            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     135            0 :   }
     136            0 :   void visit (HIR::CompoundAssignmentExpr &expr) override
     137              :   {
     138            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     139            0 :   }
     140            0 :   void visit (HIR::ArrayExpr &expr) override
     141              :   {
     142            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     143            0 :   }
     144            0 :   void visit (HIR::ArrayIndexExpr &expr) override
     145              :   {
     146            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     147            0 :   }
     148            0 :   void visit (HIR::TupleExpr &expr) override
     149              :   {
     150            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     151            0 :   }
     152            0 :   void visit (HIR::TupleIndexExpr &expr) override
     153              :   {
     154            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     155            0 :   }
     156            0 :   void visit (HIR::CallExpr &expr) override
     157              :   {
     158            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     159            0 :   }
     160            0 :   void visit (HIR::MethodCallExpr &expr) override
     161              :   {
     162            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     163            0 :   }
     164            0 :   void visit (HIR::FieldAccessExpr &expr) override
     165              :   {
     166            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     167            0 :   }
     168            0 :   void visit (HIR::BlockExpr &expr) override
     169              :   {
     170            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     171            0 :   }
     172            0 :   void visit (HIR::AnonConst &expr) override
     173              :   {
     174            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     175            0 :   }
     176            0 :   void visit (HIR::ConstBlock &expr) override
     177              :   {
     178            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     179            0 :   }
     180            0 :   void visit (HIR::UnsafeBlockExpr &expr) override
     181              :   {
     182            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     183            0 :   }
     184            0 :   void visit (HIR::LoopExpr &expr) override
     185              :   {
     186            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     187            0 :   }
     188            0 :   void visit (HIR::WhileLoopExpr &expr) override
     189              :   {
     190            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     191            0 :   }
     192            0 :   void visit (HIR::WhileLetLoopExpr &expr) override
     193              :   {
     194            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     195            0 :   }
     196            0 :   void visit (HIR::IfExpr &expr) override
     197              :   {
     198            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     199            0 :   }
     200            0 :   void visit (HIR::IfExprConseqElse &expr) override
     201              :   {
     202            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     203            0 :   }
     204            0 :   void visit (HIR::MatchExpr &expr) override
     205              :   {
     206            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     207            0 :   }
     208            0 :   void visit (HIR::AwaitExpr &expr) override
     209              :   {
     210            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     211            0 :   }
     212            0 :   void visit (HIR::AsyncBlockExpr &expr) override
     213              :   {
     214            0 :     return_place (ExprStmtBuilder (ctx).build (expr), expr.get_locus ());
     215            0 :   }
     216              : 
     217            0 :   void visit (HIR::InlineAsm &expr) override {}
     218            0 :   void visit (HIR::LlvmInlineAsm &expr) override {}
     219            0 :   void visit (HIR::OffsetOf &expr) override {}
     220              : 
     221              : protected: // Illegal at this position.
     222            0 :   void visit (HIR::StructExprFieldIdentifier &field) override
     223              :   {
     224            0 :     rust_unreachable ();
     225              :   }
     226            0 :   void visit (HIR::StructExprFieldIdentifierValue &field) override
     227              :   {
     228            0 :     rust_unreachable ();
     229              :   }
     230            0 :   void visit (HIR::StructExprFieldIndexValue &field) override
     231              :   {
     232            0 :     rust_unreachable ();
     233              :   }
     234            0 :   void visit (HIR::ContinueExpr &expr) override { rust_unreachable (); }
     235            0 :   void visit (HIR::BreakExpr &expr) override { rust_unreachable (); }
     236            0 :   void visit (HIR::RangeFromToExpr &expr) override { rust_unreachable (); }
     237            0 :   void visit (HIR::RangeFromExpr &expr) override { rust_unreachable (); }
     238            0 :   void visit (HIR::RangeToExpr &expr) override { rust_unreachable (); }
     239            0 :   void visit (HIR::RangeFullExpr &expr) override { rust_unreachable (); }
     240            0 :   void visit (HIR::RangeFromToInclExpr &expr) override { rust_unreachable (); }
     241            0 :   void visit (HIR::RangeToInclExpr &expr) override { rust_unreachable (); }
     242            0 :   void visit (HIR::ReturnExpr &expr) override { rust_unreachable (); }
     243              : };
     244              : 
     245              : } // namespace BIR
     246              : } // namespace Rust
     247              : 
     248              : #endif // RUST_BIR_BUILDER_LAZYBOOLEXPR_H