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Add intrinsics.c_var_*

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This commit is contained in:
gingerBill
2026-04-28 15:00:53 +01:00
parent bb291cfcd0
commit 7b97530443
8 changed files with 282 additions and 9 deletions
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52
src/llvm_backend_proc.cpp
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@@ -625,6 +625,11 @@ gb_internal void lb_begin_procedure_body(lbProcedure *p) {
continue;
}
if (e->flags & EntityFlag_CVarArg) {
GB_ASSERT(i+1 == params->variables.count);
continue;
}
lbArgType *arg_type = &ft->args[param_index];
defer (param_index += 1);
@@ -4279,6 +4284,53 @@ gb_internal lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValu
case BuiltinProc_objc_super: return lb_handle_objc_super(p, expr);
case BuiltinProc_c_va_start:
{
lbValue ptr = lb_build_expr(p, ce->args[0]);
lbValue args = lb_build_expr(p, ce->args[1]);
gb_unused(args);
LLVMValueRef va_start_args[] = {ptr.value};
LLVMTypeRef va_start_types[] = {lb_type(p->module, ptr.type)};
LLVMValueRef res = lb_call_intrinsic(p, "llvm.va_start", va_start_args, gb_count_of(va_start_args), va_start_types, gb_count_of(va_start_types));
gb_unused(res);
return {};
} break;
case BuiltinProc_c_va_end:
{
lbValue ptr = lb_build_expr(p, ce->args[0]);
LLVMValueRef va_end_args[] = {ptr.value};
LLVMTypeRef va_end_types[] = {lb_type(p->module, ptr.type)};
LLVMValueRef res = lb_call_intrinsic(p, "llvm.va_end", va_end_args, gb_count_of(va_end_args), va_end_types, gb_count_of(va_end_types));
gb_unused(res);
return {};
} break;
case BuiltinProc_c_va_copy:
{
lbValue dst = lb_build_expr(p, ce->args[0]);
lbValue src = lb_build_expr(p, ce->args[1]);
LLVMValueRef va_end_args[] = {dst.value, src.value};
LLVMTypeRef va_end_types[] = {lb_type(p->module, dst.type)};
LLVMValueRef res = lb_call_intrinsic(p, "llvm.va_copy", va_end_args, gb_count_of(va_end_args), va_end_types, gb_count_of(va_end_types));
gb_unused(res);
return {};
} break;
case BuiltinProc_c_va_arg:
{
lbValue ptr = lb_build_expr(p, ce->args[0]);
Type *type = type_of_expr(ce->args[1]);
LLVMValueRef value = LLVMBuildVAArg(p->builder, ptr.value, lb_type(p->module, type), "");
return {value, type};
} break;
case BuiltinProc_constant_utf16_cstring:
{
auto const encode_surrogate_pair = [](Rune r, u16 *r1, u16 *r2) {