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// Copyright (C) 2020-2025 Free Software Foundation, Inc.
// This file is part of GCC.
// GCC is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 3, or (at your option) any later
// version.
// GCC is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
// You should have received a copy of the GNU General Public License
// along with GCC; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include "rust-compile-block.h"
#include "rust-compile-stmt.h"
#include "rust-compile-expr.h"
namespace Rust {
namespace Compile {
CompileBlock::CompileBlock (Context *ctx, Bvariable *result)
: HIRCompileBase (ctx), translated (nullptr), result (result)
{}
tree
CompileBlock::compile (HIR::BlockExpr *expr, Context *ctx, Bvariable *result)
{
CompileBlock compiler (ctx, result);
compiler.visit (*expr);
return compiler.translated;
}
void
CompileBlock::visit (HIR::BlockExpr &expr)
{
fncontext fnctx = ctx->peek_fn ();
tree fndecl = fnctx.fndecl;
location_t start_location = expr.get_locus ();
location_t end_location = expr.get_end_locus ();
tree enclosing_scope = ctx->peek_enclosing_scope ();
tree new_block = Backend::block (fndecl, enclosing_scope, {} /*locals*/,
start_location, end_location);
ctx->push_block (new_block);
for (auto &s : expr.get_statements ())
{
auto compiled_expr = CompileStmt::Compile (s.get (), ctx);
if (compiled_expr != nullptr)
{
tree s = convert_to_void (compiled_expr, ICV_STATEMENT);
ctx->add_statement (s);
}
}
if (expr.has_expr ())
{
tree compiled_expr = CompileExpr::Compile (expr.expr.get (), ctx);
if (result != nullptr)
{
location_t locus = expr.get_final_expr ()->get_locus ();
tree result_reference = Backend::var_expression (result, locus);
tree assignment
= Backend::assignment_statement (result_reference, compiled_expr,
expr.get_locus ());
ctx->add_statement (assignment);
}
}
else if (result != nullptr)
{
location_t locus = expr.get_locus ();
tree compiled_expr = unit_expression (expr.get_locus ());
tree result_reference = Backend::var_expression (result, locus);
tree assignment
= Backend::assignment_statement (result_reference, compiled_expr,
expr.get_locus ());
ctx->add_statement (assignment);
}
ctx->pop_block ();
translated = new_block;
}
void
CompileConditionalBlocks::visit (HIR::IfExpr &expr)
{
fncontext fnctx = ctx->peek_fn ();
tree fndecl = fnctx.fndecl;
tree condition_expr
= CompileExpr::Compile (expr.get_if_condition ().get (), ctx);
tree then_block
= CompileBlock::compile (expr.get_if_block ().get (), ctx, result);
translated = Backend::if_statement (fndecl, condition_expr, then_block, NULL,
expr.get_locus ());
}
void
CompileConditionalBlocks::visit (HIR::IfExprConseqElse &expr)
{
fncontext fnctx = ctx->peek_fn ();
tree fndecl = fnctx.fndecl;
tree condition_expr
= CompileExpr::Compile (expr.get_if_condition ().get (), ctx);
tree then_block
= CompileBlock::compile (expr.get_if_block ().get (), ctx, result);
// else block
std::vector<Bvariable *> locals;
location_t start_location = expr.get_else_block ()->get_locus ();
location_t end_location = expr.get_else_block ()->get_locus (); // FIXME
tree enclosing_scope = ctx->peek_enclosing_scope ();
tree else_block = Backend::block (fndecl, enclosing_scope, locals,
start_location, end_location);
ctx->push_block (else_block);
tree else_stmt_decl
= CompileExprWithBlock::compile (expr.get_else_block ().get (), ctx,
result);
ctx->add_statement (else_stmt_decl);
ctx->pop_block ();
translated = Backend::if_statement (fndecl, condition_expr, then_block,
else_block, expr.get_locus ());
}
} // namespace Compile
} // namespace Rust
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