forked from AbleOS/holey-bytes
properly handling cases when stack is referenced by dofferent part of the memory
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b4b3bae104
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be828b8c54
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@ -1993,7 +1993,32 @@ impl<'a> Codegen<'a> {
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);
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debug_assert!(self.ci.nodes[region].kind != Kind::Stre);
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let index = self.aclass_index(region);
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let (value_index, value_region) = self.aclass_index(value);
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if value_index != 0 {
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// simply switch the class to the default one
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let aclass = &mut self.ci.scope.aclasses[value_index];
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let loads = mem::take(&mut aclass.loads);
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self.ci.nodes.load_loop_aclass(value_index, aclass, &mut self.ci.loops);
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let last_store = aclass.last_store.get();
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let mut cursor = last_store;
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let mut first_store = cursor;
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while cursor != MEM {
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first_store = cursor;
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cursor = self.ci.nodes[cursor].inputs[3];
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}
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if last_store != MEM {
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let base_class = self.ci.scope.aclasses[0].last_store.get();
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if base_class != MEM {
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self.ci.nodes.modify_input(first_store, 3, base_class);
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}
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self.ci.scope.aclasses[0].last_store.set(last_store, &mut self.ci.nodes);
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}
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self.ci.scope.aclasses[0].loads.extend(loads);
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self.ci.nodes[value_region].aclass = 0;
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}
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let (index, _) = self.aclass_index(region);
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let aclass = &mut self.ci.scope.aclasses[index];
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self.ci.nodes.load_loop_aclass(index, aclass, &mut self.ci.loops);
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let mut vc = Vc::from([VOID, value, region, aclass.last_store.get()]);
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@ -2027,7 +2052,7 @@ impl<'a> Codegen<'a> {
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self.ty_display(self.ci.nodes[region].ty)
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);
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debug_assert!(self.ci.nodes[region].kind != Kind::Stre);
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let index = self.aclass_index(region);
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let (index, _) = self.aclass_index(region);
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let aclass = &mut self.ci.scope.aclasses[index];
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self.ci.nodes.load_loop_aclass(index, aclass, &mut self.ci.loops);
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let vc = [VOID, region, aclass.last_store.get()];
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@ -2036,7 +2061,7 @@ impl<'a> Codegen<'a> {
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load
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}
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pub fn aclass_index(&mut self, mut region: Nid) -> usize {
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pub fn aclass_index(&mut self, mut region: Nid) -> (usize, Nid) {
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loop {
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region = match self.ci.nodes[region].kind {
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Kind::BinOp { op: TokenKind::Add | TokenKind::Sub } => {
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@ -2046,7 +2071,7 @@ impl<'a> Codegen<'a> {
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debug_assert_eq!(self.ci.nodes[region].inputs[2], 0);
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self.ci.nodes[region].inputs[1]
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}
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_ => break self.ci.nodes[region].aclass,
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_ => break (self.ci.nodes[region].aclass, region),
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};
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}
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}
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@ -2542,7 +2567,7 @@ impl<'a> Codegen<'a> {
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for arg in args {
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let value = self.expr(arg)?;
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if let Some(base) = self.tys.base_of(value.ty) {
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clobbered_aliases.push(self.aclass_index(value.id));
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clobbered_aliases.push(self.aclass_index(value.id).0);
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if base.has_pointers(self.tys) {
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clobbered_aliases.push(0);
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}
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@ -2649,7 +2674,7 @@ impl<'a> Codegen<'a> {
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self.assert_ty(arg.pos(), &mut value, ty, fa!("argument {}", carg.name));
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if let Some(base) = self.tys.base_of(value.ty) {
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clobbered_aliases.push(self.aclass_index(value.id));
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clobbered_aliases.push(self.aclass_index(value.id).0);
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if base.has_pointers(self.tys) {
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clobbered_aliases.push(0);
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}
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