Changeset b91bfde

Timestamp:

Apr 12, 2021, 11:53:30 AM (4 years ago)

Author:

Andrew Beach <ajbeach@…>

Branches:

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

Children:

73f4d08

Parents:

ecfd758

Message:

Added and used some helpers. The widely useful one is a from_string helper for constants.

Location:

src

Files:

• AST/Expr.cpp (modified) (1 diff)
• AST/Expr.hpp (modified) (1 diff)
• SynTree/Constant.cc (modified) (1 diff)
• SynTree/Constant.h (modified) (1 diff)
• Virtual/ExpandCasts.cc (modified) (3 diffs)
• Virtual/Tables.cc (modified) (1 diff)

src/AST/Expr.cpp

@@ -260 +260 @@
 }
 
+ConstantExpr * ConstantExpr::from_string( const CodeLocation & loc, const std::string & str ) {
+        const Type * charType = new BasicType( BasicType::Char );
+        // Adjust the length of the string for the terminator.
+        const Expr * strSize = from_ulong( loc, str.size() + 1 );
+        const Type * strType = new ArrayType( charType, strSize, FixedLen, StaticDim );
+        const std::string strValue = "\"" + str + "\"";
+        return new ConstantExpr( loc, strType, strValue, std::nullopt );
+}
+
 ConstantExpr * ConstantExpr::null( const CodeLocation & loc, const Type * ptrType ) {
         return new ConstantExpr{

src/AST/Expr.hpp

@@ -438 +438 @@
         long long int intValue() const;
 
-        /// generates a boolean constant of the given bool
+        /// Generates a boolean constant of the given bool.
         static ConstantExpr * from_bool( const CodeLocation & loc, bool b );
-        /// generates an integer constant of the given int
+        /// Generates an integer constant of the given int.
         static ConstantExpr * from_int( const CodeLocation & loc, int i );
-        /// generates an integer constant of the given unsigned long int
+        /// Generates an integer constant of the given unsigned long int.
         static ConstantExpr * from_ulong( const CodeLocation & loc, unsigned long i );
-        /// generates a null pointer value for the given type. void * if omitted.
+        /// Generates a string constant from the given string (char type, unquoted string).
+        static ConstantExpr * from_string( const CodeLocation & loc, const std::string & string );
+        /// Generates a null pointer value for the given type. void * if omitted.
         static ConstantExpr * null( const CodeLocation & loc, const Type * ptrType = nullptr );
 

src/SynTree/Constant.cc

@@ -42 +42 @@
 }
 
+Constant Constant::from_string( const std::string & str ) {
+        Type * charType = new BasicType( noQualifiers, BasicType::Char );
+        // Adjust the length of the string for the terminator.
+        Expression * strSize = new ConstantExpr( Constant::from_ulong( str.size() + 1 ) );
+        Type * strType = new ArrayType( noQualifiers, charType, strSize, false, false );
+        const std::string strValue = "\"" + str + "\"";
+        return Constant( strType, strValue, std::nullopt );
+}
+
 Constant Constant::null( Type * ptrtype ) {
         if ( nullptr == ptrtype ) {

src/SynTree/Constant.h

@@ -47 +47 @@
         /// generates an integer constant of the given unsigned long int
         static Constant from_ulong( unsigned long i );
+        /// generates a string constant from the given string (char type, unquoted string)
+        static Constant from_string( const std::string & string );
 
         /// generates a null pointer value for the given type. void * if omitted.

src/Virtual/ExpandCasts.cc

@@ -77 +77 @@
 
         class VirtualCastCore {
-                Type * pointer_to_pvt(int level_of_indirection) {
+                CastExpr * cast_to_type_id( Expression * expr, int level_of_indirection ) {
                         Type * type = new StructInstType(
                                 Type::Qualifiers( Type::Const ), pvt_decl );
@@ -83 +83 @@
                                 type = new PointerType( noQualifiers, type );
                         }
-                        return type;
+                        return new CastExpr( expr, type );
                 }
 
@@ -253 +253 @@
                 Expression * result = new CastExpr(
                         new ApplicationExpr( VariableExpr::functionPointer( vcast_decl ), {
-                                        new CastExpr(
-                                                new AddressExpr( new VariableExpr( type_id ) ),
-                                                pointer_to_pvt(1)
-                                        ),
-                                        new CastExpr(
-                                                castExpr->get_arg(),
-                                                pointer_to_pvt(2)
-                                        )
+                                cast_to_type_id( new AddressExpr( new VariableExpr( type_id ) ), 1 ),
+                                cast_to_type_id( castExpr->get_arg(), 2 ),
                         } ),
                         castExpr->get_result()->clone()

src/Virtual/Tables.cc

@@ -172 +172 @@
 
 Attribute * linkonce( const std::string & subsection ) {
-        const std::string section = "\".gnu.linkonce." + subsection + "\"";
-        // Adjust for terminator and quotes.
-        size_t str_size = section.size() + 1 - 2;
+        const std::string section = ".gnu.linkonce." + subsection;
         return new Attribute( "section", {
-                new ConstantExpr( Constant(
-                        new ArrayType(
-                                noQualifiers,
-                                new BasicType( noQualifiers, BasicType::Char ),
-                                new ConstantExpr( Constant::from_ulong( str_size ) ),
-                                false, false ),
-                        section,
-                        std::nullopt
-                ) ),
+                new ConstantExpr( Constant::from_string( section ) ),
         } );
 }