3 use cranelift::codegen::ir::immediates::Offset32;
5 #[derive(Copy, Clone, Debug)]
11 #[derive(Copy, Clone, Debug)]
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 get_addr<'a, 'tcx>(self, fx: &mut FunctionCx<'a, 'tcx, impl Backend>) -> Value {
42 PointerBase::Addr(base_addr) => {
43 let offset: i64 = self.offset.into();
47 fx.bcx.ins().iadd_imm(base_addr, offset)
50 PointerBase::Stack(stack_slot) => fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, self.offset),
54 pub fn try_get_addr_and_offset(self) -> Option<(Value, Offset32)> {
56 PointerBase::Addr(addr) => Some((addr, self.offset)),
57 PointerBase::Stack(_) => None,
61 pub fn offset<'a, 'tcx>(
63 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
64 extra_offset: Offset32,
66 self.offset_i64(fx, extra_offset.into())
69 pub fn offset_i64<'a, 'tcx>(
71 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
74 if let Some(new_offset) = self.offset.try_add_i64(extra_offset) {
80 let base_offset: i64 = self.offset.into();
81 if let Some(new_offset) = base_offset.checked_add(extra_offset){
82 let base_addr = match self.base {
83 PointerBase::Addr(addr) => addr,
84 PointerBase::Stack(stack_slot) => fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0),
86 let addr = fx.bcx.ins().iadd_imm(base_addr, new_offset);
88 base: PointerBase::Addr(addr),
89 offset: Offset32::new(0),
92 panic!("self.offset ({}) + extra_offset ({}) not representable in i64", base_offset, extra_offset);
97 pub fn offset_value<'a, 'tcx>(
99 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
103 PointerBase::Addr(addr) => Pointer {
104 base: PointerBase::Addr(fx.bcx.ins().iadd(addr, extra_offset)),
107 PointerBase::Stack(stack_slot) => {
108 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, self.offset);
110 base: PointerBase::Addr(fx.bcx.ins().iadd(base_addr, extra_offset)),
111 offset: Offset32::new(0),
117 pub fn load<'a, 'tcx>(
119 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
124 PointerBase::Addr(base_addr) => fx.bcx.ins().load(ty, flags, base_addr, self.offset),
125 PointerBase::Stack(stack_slot) => if ty == types::I128 {
126 // WORKAROUND for stack_load.i128 not being implemented
127 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0);
128 fx.bcx.ins().load(ty, flags, base_addr, self.offset)
130 fx.bcx.ins().stack_load(ty, stack_slot, self.offset)
135 pub fn store<'a, 'tcx>(
137 fx: &mut FunctionCx<'a, 'tcx, impl Backend>,
142 PointerBase::Addr(base_addr) => {
143 fx.bcx.ins().store(flags, value, base_addr, self.offset);
145 PointerBase::Stack(stack_slot) => if fx.bcx.func.dfg.value_type(value) == types::I128 {
146 // WORKAROUND for stack_load.i128 not being implemented
147 let base_addr = fx.bcx.ins().stack_addr(fx.pointer_type, stack_slot, 0);
148 fx.bcx.ins().store(flags, value, base_addr, self.offset);
150 fx.bcx.ins().stack_store(value, stack_slot, self.offset);