Changeset 58fe85a for src/Parser/StatementNode.cc

Timestamp:

Jan 7, 2021, 3:27:00 PM (5 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

2b4daf2, 64aeca0

Parents:

3c64c668 (diff), eef8dfb (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge branch 'master' into park_unpark

File:

• src/Parser/StatementNode.cc (modified) (3 diffs)

src/Parser/StatementNode.cc

@@ -10 +10 @@
 // Created On       : Sat May 16 14:59:41 2015
 // Last Modified By : Peter A. Buhr
-// Last Modified On : Sat Aug  4 09:39:25 2018
-// Update Count     : 363
+// Last Modified On : Sat Oct 24 04:20:55 2020
+// Update Count     : 383
 //
 
@@ -249 +249 @@
 } // build_finally
 
+SuspendStmt * build_suspend( StatementNode * then, SuspendStmt::Type type ) {
+        auto node = new SuspendStmt();
+
+        node->type = type;
+
+        std::list< Statement * > stmts;
+        buildMoveList< Statement, StatementNode >( then, stmts );
+        if(!stmts.empty()) {
+                assert( stmts.size() == 1 );
+                node->then = dynamic_cast< CompoundStmt * >( stmts.front() );
+        }
+
+        return node;
+}
+
 WaitForStmt * build_waitfor( ExpressionNode * targetExpr, StatementNode * stmt, ExpressionNode * when ) {
         auto node = new WaitForStmt();
@@ -330 +345 @@
 } // build_compound
 
+// A single statement in a control structure is always converted to a compound statement so subsequent generated code
+// can be placed within this compound statement. Otherwise, code generation has to constantly check for a single
+// statement and wrap it into a compound statement to insert additional code. Hence, all control structures have a
+// conical form for code generation.
+StatementNode * maybe_build_compound( StatementNode * first ) {
+        // Optimization: if the control-structure statement is a compound statement, do not wrap it.
+        // e.g., if (...) {...} do not wrap the existing compound statement.
+        if ( ! dynamic_cast<CompoundStmt *>( first->stmt.get() ) ) { // unique_ptr
+                CompoundStmt * cs = new CompoundStmt();
+                buildMoveList( first, cs->get_kids() );
+                return new StatementNode( cs );
+        } // if
+        return first;
+} // maybe_build_compound
+
 Statement * build_asm( bool voltile, Expression * instruction, ExpressionNode * output, ExpressionNode * input, ExpressionNode * clobber, LabelNode * gotolabels ) {
         std::list< Expression * > out, in;