69 lines
2.3 KiB
Rust
69 lines
2.3 KiB
Rust
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use std::collections::HashMap;
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use inkwell::values::BasicValueEnum;
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use crate::backend::llvm::context::CodegenContext;
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use crate::mir::{instruction::ConstValue, ValueId};
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pub(in super::super) fn lower_const<'ctx>(
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codegen: &CodegenContext<'ctx>,
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vmap: &mut HashMap<ValueId, BasicValueEnum<'ctx>>,
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dst: ValueId,
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value: &ConstValue,
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) -> Result<(), String> {
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let bval = match value {
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ConstValue::Integer(i) => codegen
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.context
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.i64_type()
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.const_int(*i as u64, true)
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.into(),
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ConstValue::Float(f) => codegen.context.f64_type().const_float(*f).into(),
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ConstValue::Bool(b) => codegen
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.context
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.bool_type()
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.const_int(*b as u64, false)
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.into(),
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ConstValue::String(s) => {
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let gv = codegen
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.builder
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.build_global_string_ptr(s, "str")
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.map_err(|e| e.to_string())?;
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let len = codegen
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.context
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.i32_type()
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.const_int(s.len() as u64, false);
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// declare i8* @nyash_string_new(i8*, i32)
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let rt = codegen.context.ptr_type(inkwell::AddressSpace::from(0));
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let fn_ty = rt.fn_type(
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&[
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codegen
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.context
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.ptr_type(inkwell::AddressSpace::from(0))
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.into(),
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codegen.context.i32_type().into(),
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],
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false,
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);
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let callee = codegen
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.module
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.get_function("nyash_string_new")
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.unwrap_or_else(|| codegen.module.add_function("nyash_string_new", fn_ty, None));
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let call = codegen
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.builder
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.build_call(callee, &[gv.as_pointer_value().into(), len.into()], "strnew")
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.map_err(|e| e.to_string())?;
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call.try_as_basic_value()
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.left()
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.ok_or("nyash_string_new returned void".to_string())?
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}
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ConstValue::Null => codegen
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.context
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.ptr_type(inkwell::AddressSpace::from(0))
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.const_null()
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.into(),
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ConstValue::Void => return Err("Const Void unsupported".to_string()),
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};
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vmap.insert(dst, bval);
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Ok(())
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}
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