Index: bindings/go/llvm/ir.go =================================================================== --- bindings/go/llvm/ir.go +++ bindings/go/llvm/ir.go @@ -611,6 +611,12 @@ } // Operations on array, pointer, and vector types (sequence types) +func GetSubtypes(Tp Type) (ret []Type) { + ret = make([]Type, C.LLVMGetNumContainedTypes(Tp.C)) + C.LLVMGetSubtypes(Tp.C, llvmTypeRefPtr(&ret[0])) + return +} + func ArrayType(elementType Type, elementCount int) (t Type) { t.C = C.LLVMArrayType(elementType.C, C.unsigned(elementCount)) return Index: bindings/go/llvm/ir_test.go =================================================================== --- bindings/go/llvm/ir_test.go +++ bindings/go/llvm/ir_test.go @@ -134,3 +134,29 @@ t.Errorf("Got metadata %v as scope, though wanted %v", loc.Scope.C, scope.C) } } + +func TestSubtypes(t *testing.T) { + cont := NewContext() + defer cont.Dispose() + + int_pointer := PointerType(cont.Int32Type(), 0) + int_inner := GetSubtypes(int_pointer); + if len(int_inner) != 1 { + t.Errorf("Got size %d, though wanted 1") + } + if int_inner[0] != cont.Int32Type() { + t.Errorf("Expected int32 type") + } + + st_pointer := cont.StructType([]Type{cont.Int32Type(), cont.Int8Type()}, false) + st_inner := GetSubtypes(st_pointer) + if len(st_inner) != 2 { + t.Errorf("Got size %d, though wanted 2") + } + if st_inner[0] != cont.Int32Type() { + t.Errorf("Expected first struct field to be int32") + } + if st_inner[1] != cont.Int8Type() { + t.Errorf("Expected second struct field to be int8") + } +}