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Add #no_init suffix directive for asm specifications.

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This commit is contained in:
gingerBill
2026-08-24 19:10:32 +01:00
parent dfa473f2c8
commit 3e159a4e10
4 changed files with 93 additions and 43 deletions
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26
src/check_asm.cpp
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@@ -793,6 +793,26 @@ gb_internal void check_asm_specs(AsmCtx *asm_ctx, CheckerContext *ctx, Scope *sc
error(spec->value, "Input parameters, and thus tied parameters, cannot be pinned to a flag style register");
}
}
for (Ast *dir_ : spec->directives) {
ast_node(dir, BasicDirective, dir_);
String name = dir->name.string;
if (name == "no_init") {
i32 input_index = -1;
check_asm_find_group(input, *asm_template_entity_decls, &input_index);
if (input_index >= 0) {
auto *i = &(*asm_template_entity_decls)[input_index];
i->no_init = true;
if (i->tie >= 0) {
auto *o = &(*asm_template_entity_decls)[i->tie];
o->no_init = true;
}
}
} else {
error(dir_, "Invalid directive for an asm specification, got '#%.*s'", LIT(name));
}
}
}
}
@@ -2451,6 +2471,9 @@ gb_internal void check_asm_template(AsmCtx *asm_ctx, CheckerContext *ctx, Entity
// straight-line instruction stream. Seeded with input-pinned registers (they
// carry their argument at entry); grows as instructions write registers.
for (auto const &ed : ate->decls) {
if (ed.no_init) {
ptr_set_add(&asm_acc.defined_params, ed.entity);
}
switch (ed.param_group) {
case AsmTemplateEntityDeclParamGroup_Input:
if (ed.pin.len != 0) {
@@ -2683,6 +2706,9 @@ gb_internal void check_asm_template(AsmCtx *asm_ctx, CheckerContext *ctx, Entity
if (ed.tie >= 0) {
continue;
}
if (ed.no_init) {
continue;
}
if (!asm_acc.straight_line) {
continue;
}