Changeset 25a054f for src/CodeGen

Timestamp:

Jan 19, 2016, 4:46:04 PM (8 years ago)

Author:

Aaron Moss <a3moss@…>

Branches:

ADT, aaron-thesis, arm-eh, ast-experimental, cleanup-dtors, ctor, deferred_resn, demangler, enum, forall-pointer-decay, gc_noraii, jacob/cs343-translation, jenkins-sandbox, master, memory, new-ast, new-ast-unique-expr, new-env, no_list, persistent-indexer, pthread-emulation, qualifiedEnum, resolv-new, string, with_gc

Children:

e551c69

Parents:

1194734

Message:

Add OffsetofExpr? for field offsets

Location:

src/CodeGen

Files:

• CodeGenerator.cc (modified) (1 diff)
• CodeGenerator.h (modified) (1 diff)

src/CodeGen/CodeGenerator.cc

@@ -443 +443 @@
         }
 
-        void CodeGenerator::visit( AlignofExpr *sizeofExpr ) {
+        void CodeGenerator::visit( AlignofExpr *alignofExpr ) {
                 // use GCC extension to avoid bumping std to C11
                 output << "__alignof__(";
-                if ( sizeofExpr->get_isType() ) {
-                        output << genType( sizeofExpr->get_type(), "" );
-                } else {
-                        sizeofExpr->get_expr()->accept( *this );
-                } // if
+                if ( alignofExpr->get_isType() ) {
+                        output << genType( alignofExpr->get_type(), "" );
+                } else {
+                        alignofExpr->get_expr()->accept( *this );
+                } // if
+                output << ")";
+        }
+
+        void CodeGenerator::visit( OffsetofExpr *offsetofExpr ) {
+                // use GCC builtin
+                output << "__builtin_offsetof(";
+                output << genType( offsetofExpr->get_type(), "" );
+                output << ", ";
+                offsetofExpr->get_member()->accept( *this );
                 output << ")";
         }

src/CodeGen/CodeGenerator.h

@@ -61 +61 @@
                 virtual void visit( SizeofExpr *sizeofExpr );
                 virtual void visit( AlignofExpr *alignofExpr );
+                virtual void visit( OffsetofExpr *offsetofExpr );
                 virtual void visit( LogicalExpr *logicalExpr );
                 virtual void visit( ConditionalExpr *conditionalExpr );