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d: Remove handling of deleting GC allocated classes. 

Now that the `delete' keyword has been removed from the front-end, only
compiler-generated uses of DeleteExp reach the code generator via the
auto-destruction of `scope class' variables.

The run-time library helpers that previously were used to delete GC
class objects can now be removed from the compiler.

gcc/d/ChangeLog:

	* expr.cc (ExprVisitor::visit (DeleteExp *)): Remove handling of
	deleting GC allocated classes.
	* runtime.def (DELCLASS): Remove.
	(DELINTERFACE): Remove.
This commit is contained in:
Iain Buclaw 2022-02-21 00:06:16 +01:00
parent 6384eff56d
commit 1d98337c6b
2 changed files with 7 additions and 23 deletions
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24
gcc/d/expr.cc
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@ -1438,28 +1438,16 @@ public:
{
/* For class object references, if there is a destructor for that class,
the destructor is called for the object instance. */
libcall_fn libcall;
gcc_assert (e->e1->op == EXP::variable);
if (e->e1->op == EXP::variable)
{
VarDeclaration *v = e->e1->isVarExp ()->var->isVarDeclaration ();
if (v && v->onstack)
{
libcall = tb1->isClassHandle ()->isInterfaceDeclaration ()
? LIBCALL_CALLINTERFACEFINALIZER : LIBCALL_CALLFINALIZER;
VarDeclaration *v = e->e1->isVarExp ()->var->isVarDeclaration ();
gcc_assert (v && v->onstack);
this->result_ = build_libcall (libcall, Type::tvoid, 1, t1);
return;
}
}
libcall_fn libcall = tb1->isClassHandle ()->isInterfaceDeclaration ()
? LIBCALL_CALLINTERFACEFINALIZER : LIBCALL_CALLFINALIZER;
/* Otherwise, the garbage collector is called to immediately free the
memory allocated for the class instance. */
libcall = tb1->isClassHandle ()->isInterfaceDeclaration ()
? LIBCALL_DELINTERFACE : LIBCALL_DELCLASS;
t1 = build_address (t1);
this->result_ = build_libcall (libcall, Type::tvoid, 1, t1);
return;
}
else
{

6
gcc/d/runtime.def
View File

@ -63,11 +63,7 @@ DEF_D_RUNTIME (ARRAYBOUNDS_INDEXP, "_d_arraybounds_indexp", RT(VOID),
DEF_D_RUNTIME (NEWCLASS, "_d_newclass", RT(OBJECT), P1(CONST_CLASSINFO), 0)
DEF_D_RUNTIME (NEWTHROW, "_d_newThrowable", RT(OBJECT), P1(CONST_CLASSINFO), 0)
/* Used when calling delete on a class or interface. */
DEF_D_RUNTIME (DELCLASS, "_d_delclass", RT(VOID), P1(VOIDPTR), 0)
DEF_D_RUNTIME (DELINTERFACE, "_d_delinterface", RT(VOID), P1(VOIDPTR), 0)
/* Same as deleting a class, but used for stack-allocated classes. */
/* Used when calling delete on a stack-allocated class or interface. */
DEF_D_RUNTIME (CALLFINALIZER, "_d_callfinalizer", RT(VOID), P1(VOIDPTR), 0)
DEF_D_RUNTIME (CALLINTERFACEFINALIZER, "_d_callinterfacefinalizer", RT(VOID),
P1(VOIDPTR), 0)