multiple jit modules linking fixes and test

gen/runtimecompile.cpp

@@ -165,8 +165,12 @@ void fixRtModule(llvm::Module &newModule,
   std::unordered_set<std::string> externalFuncs;
   for (auto &&it : funcs) {
     assert(nullptr != it.first);
-    assert(nullptr != it.second.thunkVar);
     assert(nullptr != it.second.thunkFunc);
+    if (nullptr == it.second.thunkVar) {
+      // thunkVar is not available
+      // e.g. runtimeCompile function from other module, ignore
+      continue;
+    }
     assert(!contains(thunkVar2func, it.second.thunkVar->getName()));
     thunkVar2func.insert({it.second.thunkVar->getName(), it.first->getName()});
     thunkFun2func.insert({it.second.thunkFunc->getName(), it.first->getName()});
@@ -497,8 +501,12 @@ generateFuncList(IRState *irs, const Types &types) {
   std::vector<llvm::Constant *> elements;
   for (auto &&it : irs->runtimeCompiledFunctions) {
     assert(nullptr != it.first);
-    assert(nullptr != it.second.thunkVar);
     assert(nullptr != it.second.thunkFunc);
+    if (nullptr == it.second.thunkVar) {
+      // thunkVar is not available
+      // e.g. runtimeCompile function from other module, ignore
+      continue;
+    }
     auto name = it.first->getName();
     llvm::Constant *fields[] = {
         createStringInitializer(irs->module, name),

tests/runtimecompile/inputs/module1.d

@@ -0,0 +1,10 @@
+module inputs.module1;
+
+import inputs.module3;
+
+import ldc.attributes;
+
+@runtimeCompile int get()
+{
+  return 3 + inputs.module3.get1() + inputs.module3.get2();
+}

tests/runtimecompile/inputs/module2.d

@@ -0,0 +1,10 @@
+module inputs.module2;
+
+import inputs.module3;
+
+import ldc.attributes;
+
+@runtimeCompile int get()
+{
+  return 4 + inputs.module3.get1() + inputs.module3.get2();
+}

tests/runtimecompile/inputs/module3.d

@@ -0,0 +1,13 @@
+module inputs.module3;
+
+import ldc.attributes;
+
+@runtimeCompile int get1()
+{
+  return 3;
+}
+
+int get2()
+{
+  return 4;
+}

tests/runtimecompile/multiple_modules.d

@@ -0,0 +1,27 @@
+
+// RUN: %ldc -enable-runtime-compile -I%S %s %S/inputs/module1.d %S/inputs/module2.d %S/inputs/module3.d -run
+
+import ldc.attributes;
+import ldc.runtimecompile;
+
+import inputs.module1;
+import inputs.module2;
+
+@runtimeCompile int foo()
+{
+  return inputs.module1.get() + inputs.module2.get();
+}
+
+int bar()
+{
+  return inputs.module1.get() + inputs.module2.get();
+}
+
+void main(string[] args)
+{
+  compileDynamicCode();
+  assert(10 == inputs.module1.get());
+  assert(11 == inputs.module2.get());
+  assert(21 == foo());
+  assert(21 == bar());
+}