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while loops

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This commit is contained in:
Valdemar Høgsvig Lorenzen
2026-06-21 23:26:11 +02:00
parent f4194492cc
commit 380b5943b3
12 changed files with 548 additions and 16 deletions
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compiler/lower/lower.odin
+54
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@@ -708,6 +708,60 @@ lower_statements :: proc(state: ^State, statements: []hir.Stmt_Id) {
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
case .While:
condition_lbl := fresh_label(state)
body_lbl := fresh_label(state)
exit_lbl := fresh_label(state)
update_lbl := condition_lbl
if statement.update != hir.INVALID_STMT {
update_lbl = fresh_label(state)
}
append_instruction(state, ir.Instruction{
op=.Br, span=statement.span, type=types.VOID, integer=condition_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
append_instruction(state, ir.Instruction{
op=.Label, span=statement.span, type=types.VOID, integer=condition_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
condition := lower_expr(state, statement.expr)
append_instruction(state, ir.Instruction{
op=.Cond_Br, span=statement.span, type=types.VOID,
a=condition, integer=body_lbl, target=ir.Ref(u32(exit_lbl)),
b=ir.INVALID_INSTRUCTION, diagnostic=source.INVALID_DIAGNOSTIC,
})
append_instruction(state, ir.Instruction{
op=.Label, span=statement.span, type=types.VOID, integer=body_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
lower_statements(state, statement.then_body)
append_instruction(state, ir.Instruction{
op=.Br, span=statement.span, type=types.VOID, integer=update_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
if statement.update != hir.INVALID_STMT {
append_instruction(state, ir.Instruction{
op=.Label, span=statement.span, type=types.VOID, integer=update_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
update := [1]hir.Stmt_Id{statement.update}
lower_statements(state, update[:])
append_instruction(state, ir.Instruction{
op=.Br, span=statement.span, type=types.VOID, integer=condition_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
}
append_instruction(state, ir.Instruction{
op=.Label, span=statement.span, type=types.VOID, integer=exit_lbl,
target=ir.INVALID_REF, a=ir.INVALID_INSTRUCTION, b=ir.INVALID_INSTRUCTION,
diagnostic=source.INVALID_DIAGNOSTIC,
})
}
}
}