3 use cranelift_codegen::ir::immediates::Offset32;
5 #[derive(Copy, Clone, Debug)]
11 #[derive(Copy, Clone, Debug)]
12 pub enum PointerBase {
18 pub fn new(addr: Value) -> Self {
20 base: PointerBase::Addr(addr),
21 offset: Offset32::new(0),
25 pub fn stack_slot(stack_slot: StackSlot) -> Self {
27 base: PointerBase::Stack(stack_slot),
28 offset: Offset32::new(0),
32 pub fn const_addr<'a, 'tcx>(fx: &mut FunctionCx<'a, 'tcx, impl Backend>, addr: i64) -> Self {
33 let addr = fx.bcx.ins().iconst(fx.pointer_type, addr);
35 base: PointerBase::Addr(addr),
36 offset: Offset32::new(0),
40 pub fn base_and_offset(self) -> (PointerBase, Offset32) {
41 (self.base, self.offset)
44 pub fn get_addr<'a, 'tcx>(self, fx: &mut FunctionCx<'a, 'tcx, impl Backend>) -> Value {
46 PointerBase::Addr(base_addr) => {
47 let offset: i64 = self.offset.into();
51 fx.bcx.ins().iadd_imm(base_addr, offset)
54 PointerBase::Stack(stack_slot) => fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, self.offset),
58 pub fn offset<'a, 'tcx>(
60 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
61 extra_offset: Offset32,
63 self.offset_i64(fx, extra_offset.into())
66 pub fn offset_i64<'a, 'tcx>(
68 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
71 if let Some(new_offset) = self.offset.try_add_i64(extra_offset) {
77 let base_offset: i64 = self.offset.into();
78 if let Some(new_offset) = base_offset.checked_add(extra_offset){
79 let base_addr = match self.base {
80 PointerBase::Addr(addr) => addr,
81 PointerBase::Stack(stack_slot) => fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0),
83 let addr = fx.bcx.ins().iadd_imm(base_addr, new_offset);
85 base: PointerBase::Addr(addr),
86 offset: Offset32::new(0),
89 panic!("self.offset ({}) + extra_offset ({}) not representable in i64", base_offset, extra_offset);
94 pub fn offset_value<'a, 'tcx>(
96 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
100 PointerBase::Addr(addr) => Pointer {
101 base: PointerBase::Addr(fx.bcx.ins().iadd(addr, extra_offset)),
104 PointerBase::Stack(stack_slot) => {
105 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, self.offset);
107 base: PointerBase::Addr(fx.bcx.ins().iadd(base_addr, extra_offset)),
108 offset: Offset32::new(0),
114 pub fn load<'a, 'tcx>(
116 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
121 PointerBase::Addr(base_addr) => fx.bcx.ins().load(ty, flags, base_addr, self.offset),
122 PointerBase::Stack(stack_slot) => if ty == types::I128 || ty.is_vector() {
123 // WORKAROUND for stack_load.i128 and stack_load.iXxY not being implemented
124 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0);
125 fx.bcx.ins().load(ty, flags, base_addr, self.offset)
127 fx.bcx.ins().stack_load(ty, stack_slot, self.offset)
132 pub fn store<'a, 'tcx>(
134 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
139 PointerBase::Addr(base_addr) => {
140 fx.bcx.ins().store(flags, value, base_addr, self.offset);
142 PointerBase::Stack(stack_slot) => {
143 let val_ty = fx.bcx.func.dfg.value_type(value);
144 if val_ty == types::I128 || val_ty.is_vector() {
145 // WORKAROUND for stack_store.i128 and stack_store.iXxY not being implemented
146 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0);
147 fx.bcx.ins().store(flags, value, base_addr, self.offset);
149 fx.bcx.ins().stack_store(value, stack_slot, self.offset);