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Add loads of RVO optimizations for basic 1-value return cases

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gingerBill
2026-03-15 21:53:38 +00:00
parent fa6109ca1e
commit 5d165f70e1
3 changed files with 216 additions and 10 deletions
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19
src/llvm_backend_proc.cpp
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@@ -1073,7 +1073,7 @@ gb_internal lbValue lb_emit_conjugate(lbProcedure *p, lbValue val, Type *type) {
return lb_emit_load(p, res);
}
gb_internal lbValue lb_emit_call(lbProcedure *p, lbValue value, Array<lbValue> const &args, ProcInlining inlining, ProcTailing tailing) {
gb_internal lbValue lb_emit_call(lbProcedure *p, lbValue value, Array<lbValue> const &args, ProcInlining inlining, ProcTailing tailing, lbValue *sret_dst) {
lbModule *m = p->module;
Type *pt = base_type(value.type);
@@ -1195,7 +1195,12 @@ gb_internal lbValue lb_emit_call(lbProcedure *p, lbValue value, Array<lbValue> c
}
if (return_by_pointer) {
lbValue return_ptr = lb_add_local_generated(p, rt, true).addr;
lbValue return_ptr = {};
if (sret_dst != nullptr) {
return_ptr = *sret_dst;
} else {
return_ptr = lb_add_local_generated(p, rt, true).addr;
}
lb_emit_call_internal(p, value, return_ptr, processed_args, nullptr, context_ptr, inlining, tailing);
result = lb_emit_load(p, return_ptr);
} else if (rt != nullptr) {
@@ -4126,13 +4131,13 @@ gb_internal lbValue lb_handle_param_value(lbProcedure *p, Type *parameter_type,
}
gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr);
gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr, lbValue *sret_dst = nullptr);
gb_internal lbValue lb_build_call_expr(lbProcedure *p, Ast *expr) {
gb_internal lbValue lb_build_call_expr(lbProcedure *p, Ast *expr, lbValue *sret_dst) {
expr = unparen_expr(expr);
ast_node(ce, CallExpr, expr);
lbValue res = lb_build_call_expr_internal(p, expr);
lbValue res = lb_build_call_expr_internal(p, expr, sret_dst);
if (ce->optional_ok_one) {
GB_ASSERT(is_type_tuple(res.type));
@@ -4153,7 +4158,7 @@ gb_internal void lb_add_values_to_array(lbProcedure *p, Array<lbValue> *args, lb
}
}
gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr) {
gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr, lbValue *sret_dst) {
lbModule *m = p->module;
TypeAndValue tv = type_and_value_of_expr(expr);
@@ -4479,6 +4484,6 @@ gb_internal lbValue lb_build_call_expr_internal(lbProcedure *p, Ast *expr) {
}
}
return lb_emit_call(p, value, call_args, inlining, tailing);
return lb_emit_call(p, value, call_args, inlining, tailing, sret_dst);
}