motiejus/zig
1
Fork 0
Code Releases Activity

no-copy semantics for function forwarding

Browse Source 
```zig
fn foo() Foo {
    return bar();
}
```

```llvm
define internal fastcc void @foo(%Foo* nonnull sret) unnamed_addr #2 !dbg !48 {
Entry:
  call fastcc void @bar(%Foo* sret %0), !dbg !52
  ret void, !dbg !54
}
```
This commit is contained in:
Andrew Kelley
2019-05-31 01:36:57 -04:00
parent 461382ae94
commit ccce3d8526
3 changed files with 16 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/codegen.cpp
View File

@@ -1995,7 +1995,7 @@ static LLVMValueRef ir_llvm_value(CodeGen *g, IrInstruction *instruction) {
if (!type_has_bits(instruction->value.type))
return nullptr;
if (!instruction->llvm_value) {
assert(instruction->value.special != ConstValSpecialRuntime);
src_assert(instruction->value.special != ConstValSpecialRuntime, instruction->source_node);
assert(instruction->value.type);
render_const_val(g, &instruction->value, "");
// we might have to do some pointer casting here due to the way union
@@ -2388,7 +2388,11 @@ static LLVMValueRef ir_render_return(CodeGen *g, IrExecutable *executable, IrIns
if (want_first_arg_sret(g, &g->cur_fn->type_entry->data.fn.fn_type_id)) {
assert(g->cur_ret_ptr);
gen_assign_raw(g, g->cur_ret_ptr, get_pointer_to_type(g, return_type, false), value);
if (return_instruction->value->value.special != ConstValSpecialRuntime) {
// if it's comptime we have to do this but if it's runtime trust that
// result location mechanism took care of it.
gen_assign_raw(g, g->cur_ret_ptr, get_pointer_to_type(g, return_type, false), value);
}
LLVMBuildRetVoid(g->builder);
} else if (handle_is_ptr(return_type)) {
LLVMValueRef by_val_value = gen_load_untyped(g, value, 0, false, "");