Fix issue #3496 - missing IR declarations for some fwd-declared functions

gen/classes.cpp

@@ -92,7 +92,6 @@ DValue *DtoNewClass(Loc &loc, TypeClass *tc, NewExp *newexp) {
   }
   // custom allocator
   else if (newexp->allocator) {
-    DtoResolveFunction(newexp->allocator);
     DFuncValue dfn(newexp->allocator, DtoCallee(newexp->allocator));
     DValue *res = DtoCallFunction(newexp->loc, nullptr, &dfn, newexp->newargs);
     mem = DtoBitCast(DtoRVal(res), DtoType(tc), ".newclass_custom");
@@ -141,7 +140,6 @@ DValue *DtoNewClass(Loc &loc, TypeClass *tc, NewExp *newexp) {
 
     Logger::println("Calling constructor");
     assert(newexp->arguments != NULL);
-    DtoResolveFunction(newexp->member);
     DFuncValue dfn(newexp->member, DtoCallee(newexp->member), mem);
     // ignore ctor return value (C++ ctors on Posix may not return `this`)
     DtoCallFunction(newexp->loc, tc, &dfn, newexp->arguments);

gen/dibuilder.cpp

@@ -1175,11 +1175,12 @@ void DIBuilder::EmitFuncEnd(FuncDeclaration *fd) {
   Logger::println("D to dwarf funcend");
   LOG_SCOPE;
 
-  assert(static_cast<llvm::MDNode *>(getIrFunc(fd)->diSubprogram) != 0);
+  auto irFunc = getIrFunc(fd);
+
+  assert(static_cast<llvm::MDNode *>(irFunc->diSubprogram) != 0);
   EmitStopPoint(fd->endloc);
 
-  // Only attach subprogram entries to function definitions
-  DtoFunction(fd)->setSubprogram(getIrFunc(fd)->diSubprogram);
+  irFunc->getLLVMFunc()->setSubprogram(irFunc->diSubprogram);
 }
 
 void DIBuilder::EmitBlockStart(Loc &loc) {

gen/llvmhelpers.cpp

@@ -1421,7 +1421,6 @@ void callPostblit(Loc &loc, Expression *exp, LLValue *val) {
         fd->toParent()->error(
             loc, "is not copyable because it is annotated with `@disable`");
       }
-      DtoResolveFunction(fd);
       Expressions args;
       DFuncValue dfn(fd, DtoCallee(fd), val);
       DtoCallFunction(loc, Type::basic[Tvoid], &dfn, &args);
@@ -1621,9 +1620,8 @@ DValue *DtoSymbolAddress(Loc &loc, Type *type, Declaration *decl) {
     // We need to codegen the function here, because literals are not added
     // to the module member list.
     DtoDefineFunction(flitdecl);
-    assert(DtoCallee(flitdecl));
 
-    return new DFuncValue(flitdecl, DtoCallee(flitdecl));
+    return new DFuncValue(flitdecl, DtoCallee(flitdecl, false));
   }
 
   if (FuncDeclaration *fdecl = decl->isFuncDeclaration()) {
@@ -1700,7 +1698,6 @@ llvm::Constant *DtoConstSymbolAddress(Loc &loc, Declaration *decl) {
   }
   // static function
   if (FuncDeclaration *fd = decl->isFuncDeclaration()) {
-    DtoResolveFunction(fd);
     return DtoCallee(fd);
   }
 

gen/rttibuilder.cpp

@@ -135,7 +135,6 @@ void RTTIBuilder::push_size_as_vp(uint64_t s) {
 
 void RTTIBuilder::push_funcptr(FuncDeclaration *fd, Type *castto) {
   if (fd) {
-    DtoResolveFunction(fd);
     LLConstant *F = DtoCallee(fd);
     if (castto) {
       F = DtoBitCast(F, DtoType(castto));

gen/toconstelem.cpp

@@ -476,7 +476,7 @@ class ToConstElemVisitor : public Visitor {
     // added to the module member list.
     Declaration_codegen(fd, p);
 
-    result = DtoCallee(fd);
+    result = DtoCallee(fd, false);
     assert(result);
 
     if (fd->tok != TOKfunction) {

gen/toir.cpp

@@ -732,7 +732,6 @@ class ToElemVisitor : public Visitor {
       assert(dve);
       FuncDeclaration *fdecl = dve->var->isFuncDeclaration();
       assert(fdecl);
-      DtoDeclareFunction(fdecl);
       Expression *thisExp = dve->e1;
       LLValue *thisArg = thisExp->type->toBasetype()->ty == Tclass
                              ? DtoRVal(thisExp)
@@ -890,7 +889,6 @@ class ToElemVisitor : public Visitor {
       // Logger::println("FuncDeclaration");
       FuncDeclaration *fd = fv->func;
       assert(fd);
-      DtoResolveFunction(fd);
       result = new DFuncValue(fd, DtoCallee(fd));
       return;
     }
@@ -984,8 +982,6 @@ class ToElemVisitor : public Visitor {
       // Logger::cout() << "mem: " << *arrptr << '\n';
       result = new DLValue(e->type, DtoBitCast(arrptr, DtoPtrToType(e->type)));
     } else if (FuncDeclaration *fdecl = e->var->isFuncDeclaration()) {
-      DtoResolveFunction(fdecl);
-
       // This is a bit more convoluted than it would need to be, because it
       // has to take templated interface methods into account, for which
       // isFinalFunc is not necessarily true.
@@ -998,6 +994,7 @@ class ToElemVisitor : public Visitor {
       // Get the actual function value to call.
       LLValue *funcval = nullptr;
       if (nonFinal) {
+        DtoResolveFunction(fdecl);
         funcval = DtoVirtualFunctionPointer(l, fdecl, e->toChars());
       } else {
         funcval = DtoCallee(fdecl);
@@ -1507,7 +1504,6 @@ class ToElemVisitor : public Visitor {
       LLValue *mem = nullptr;
       if (e->allocator) {
         // custom allocator
-        DtoResolveFunction(e->allocator);
         DFuncValue dfn(e->allocator, DtoCallee(e->allocator));
         DValue *res = DtoCallFunction(e->loc, nullptr, &dfn, e->newargs);
         mem = DtoBitCast(DtoRVal(res), DtoType(ntype->pointerTo()),
@@ -1536,7 +1532,6 @@ class ToElemVisitor : public Visitor {
 
           IF_LOG Logger::println("Calling constructor");
           assert(e->arguments != NULL);
-          DtoResolveFunction(e->member);
           DFuncValue dfn(e->member, DtoCallee(e->member), mem);
           DtoCallFunction(e->loc, ts, &dfn, e->arguments);
         }
@@ -1734,7 +1729,6 @@ class ToElemVisitor : public Visitor {
 
       Logger::print("calling struct invariant");
 
-      DtoResolveFunction(invDecl);
       DFuncValue invFunc(invDecl, DtoCallee(invDecl), DtoRVal(cond));
       DtoCallFunction(e->loc, nullptr, &invFunc, nullptr);
     }
@@ -2174,7 +2168,7 @@ class ToElemVisitor : public Visitor {
       DtoDeclareFunction(fd);
       assert(!fd->isNested());
     }
-    assert(DtoCallee(fd));
+    assert(DtoCallee(fd, false));
   }
 
   //////////////////////////////////////////////////////////////////////////////
@@ -2188,6 +2182,7 @@ class ToElemVisitor : public Visitor {
     assert(fd);
 
     genFuncLiteral(fd, e);
+    LLFunction *callee = DtoCallee(fd, false);
 
     if (fd->isNested()) {
       LLType *dgty = DtoType(e->type);
@@ -2217,12 +2212,12 @@ class ToElemVisitor : public Visitor {
       }
       cval = DtoBitCast(cval, dgty->getContainedType(0));
 
-      LLValue *castfptr = DtoBitCast(DtoCallee(fd), dgty->getContainedType(1));
+      LLValue *castfptr = DtoBitCast(callee, dgty->getContainedType(1));
 
       result = new DImValue(e->type, DtoAggrPair(cval, castfptr, ".func"));
 
     } else {
-      result = new DFuncValue(e->type, fd, DtoCallee(fd));
+      result = new DFuncValue(e->type, fd, callee);
     }
   }
 
@@ -2862,7 +2857,6 @@ bool toInPlaceConstruction(DLValue *lhs, Expression *rhs) {
           auto lval = DtoLVal(lhs);
           ToElemVisitor::emitStructLiteral(sle, lval);
           // ... and invoke the ctor directly on it
-          DtoDeclareFunction(fd);
           auto fnval = new DFuncValue(fd, DtoCallee(fd), lval);
           DtoCallFunction(ce->loc, ce->type, fnval, ce->arguments);
           return true;

ir/irclass.cpp

@@ -198,8 +198,6 @@ LLConstant *IrClass::getVtblInit() {
         }
       }
 
-      DtoResolveFunction(fd);
-      assert(isIrFuncCreated(fd) && "invalid vtbl function");
       c = DtoBitCast(DtoCallee(fd), voidPtrType);
 
       if (cd->isFuncHidden(fd) && !fd->isFuture()) {

ir/irfunction.cpp

@@ -10,6 +10,7 @@
 #include "ir/irfunction.h"
 
 #include "driver/cl_options.h"
+#include "gen/functions.h"
 #include "gen/llvm.h"
 #include "gen/llvmhelpers.h"
 #include "gen/irstate.h"
@@ -102,12 +103,10 @@ bool isIrFuncCreated(FuncDeclaration *decl) {
   return t == IrDsymbol::FuncType;
 }
 
-llvm::Function *DtoFunction(FuncDeclaration *decl, bool create) {
-  assert(decl != nullptr);
-  return getIrFunc(decl, create)->getLLVMFunc();
-}
-
 llvm::Function *DtoCallee(FuncDeclaration *decl, bool create) {
   assert(decl != nullptr);
-  return getIrFunc(decl, create)->getLLVMCallee();
+  if (create) {
+    DtoDeclareFunction(decl);
+  }
+  return getIrFunc(decl)->getLLVMCallee();
 }

ir/irfunction.h

@@ -105,10 +105,6 @@ struct IrFunction {
 IrFunction *getIrFunc(FuncDeclaration *decl, bool create = false);
 bool isIrFuncCreated(FuncDeclaration *decl);
 
-/// Returns the associated LLVM function.
-/// Use DtoCallee() for the LLVM function to be used for calls.
-llvm::Function *DtoFunction(FuncDeclaration *decl, bool create = false);
-
 /// Returns the associated LLVM function to be used for calls (potentially
 /// some sort of wrapper, e.g., a JIT wrapper).
-llvm::Function *DtoCallee(FuncDeclaration *decl, bool create = false);
+llvm::Function *DtoCallee(FuncDeclaration *decl, bool create = true);

tests/compilable/gh3496.d

@@ -0,0 +1,13 @@
+// RUN: %ldc -c %s
+
+interface I
+{
+    static void staticFoo();
+    final void finalFoo();
+}
+
+void foo()
+{
+    I.staticFoo();
+    (new class I{}).finalFoo();
+}