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distinct type aliasing

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This commit is contained in:
Valdemar Høgsvig Lorenzen
2026-06-23 12:29:21 +02:00
parent 6512ccd543
commit f16f352d1e
15 changed files with 525 additions and 58 deletions
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compiler/lower/lower.odin
+9 -7
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@@ -38,11 +38,12 @@ clone_args :: proc(values: []ir.Instruction_Id, allocator: mem.Allocator) -> []i
return result
}
sentinel :: proc(value_type: types.Type, selected := target.DEFAULT) -> i64 {
if types.is_float(value_type, selected) {
return i64(0x7fc0_0000) if types.bits(value_type, selected) == 32 else transmute(i64)u64(0x7ff8_0000_0000_0000)
sentinel :: proc(value_type: types.Type, store: ^types.Store, selected := target.DEFAULT) -> i64 {
repr := types.runtime_representation(value_type, store)
if types.is_float(repr, selected) {
return i64(0x7fc0_0000) if types.bits(repr, selected) == 32 else transmute(i64)u64(0x7ff8_0000_0000_0000)
}
switch types.bits(value_type, selected) {
switch types.bits(repr, selected) {
case 8: return -86
case 16: return -21846
case 32: return -1431655766
@@ -73,7 +74,7 @@ append_recovery_value :: proc(
op=.Const,
span=span,
type=fallback,
integer=sentinel(fallback, state.hir_module.target),
integer=sentinel(fallback, &state.hir_module.types, state.hir_module.target),
target=ir.INVALID_REF,
a=ir.INVALID_INSTRUCTION,
b=ir.INVALID_INSTRUCTION,
@@ -466,7 +467,7 @@ lower_expr :: proc(state: ^State, expr_id: hir.Expr_Id) -> ir.Instruction_Id {
})
}
_ = pop(&stack)
case .Widen, .C_Vararg_Promote, .Weaken_Pointer, .Weaken_Slice, .Decay_Array_Pointer:
case .Widen, .C_Vararg_Promote, .Retype, .Weaken_Pointer, .Weaken_Slice, .Decay_Array_Pointer:
stack[frame_index].stage = 1
append(&stack, Lower_Expr_Frame{expr=expr.left})
case .Negate:
@@ -524,6 +525,7 @@ lower_expr :: proc(state: ^State, expr_id: hir.Expr_Id) -> ir.Instruction_Id {
case .Weaken_Slice: op = .Weaken_Slice
case .Decay_Array_Pointer: op = .Decay_Array_Pointer
case .C_Vararg_Promote: op = .C_Vararg_Promote
case .Retype: op = .Retype
case: op = .Widen
}
last = append_instruction(state, ir.Instruction{
@@ -1286,7 +1288,7 @@ lower_body :: proc(hir_module: ^hir.Module, function: hir.Function, allocator: m
value := append_instruction(&state, ir.Instruction{
op=.Const,
type=function.result,
integer=sentinel(function.result, hir_module.target),
integer=sentinel(function.result, &hir_module.types, hir_module.target),
target=ir.INVALID_REF,
a=ir.INVALID_INSTRUCTION,
b=ir.INVALID_INSTRUCTION,