de-rust phase-0: archive Rust LLVM backend to archive/rust-llvm-backend (RESTORE documented); defaults unaffected

2025-11-09 01:00:43 +09:00
parent 024a4fecb7
commit 5d2cd5bad0
37 changed files with 57 additions and 0 deletions
--- a/archive/rust-llvm-backend/llvm/compiler/codegen/instructions/consts.rs
+++ b/archive/rust-llvm-backend/llvm/compiler/codegen/instructions/consts.rs
@ -0,0 +1,65 @@
+use std::collections::HashMap;
+
+use inkwell::values::BasicValueEnum;
+
+use crate::backend::llvm::context::CodegenContext;
+use crate::mir::{instruction::ConstValue, ValueId};
+
+pub(in super::super) fn lower_const<'ctx>(
+    codegen: &CodegenContext<'ctx>,
+    vmap: &mut HashMap<ValueId, BasicValueEnum<'ctx>>,
+    dst: ValueId,
+    value: &ConstValue,
+) -> Result<(), String> {
+    let bval = match value {
+        ConstValue::Integer(i) => codegen.context.i64_type().const_int(*i as u64, true).into(),
+        ConstValue::Float(f) => codegen.context.f64_type().const_float(*f).into(),
+        ConstValue::Bool(b) => codegen
+            .context
+            .bool_type()
+            .const_int(*b as u64, false)
+            .into(),
+        ConstValue::String(s) => {
+            let gv = codegen
+                .builder
+                .build_global_string_ptr(s, "str")
+                .map_err(|e| e.to_string())?;
+            let len = codegen.context.i32_type().const_int(s.len() as u64, false);
+            // declare i8* @nyash_string_new(i8*, i32)
+            let rt = codegen.context.ptr_type(inkwell::AddressSpace::from(0));
+            let fn_ty = rt.fn_type(
+                &[
+                    codegen
+                        .context
+                        .ptr_type(inkwell::AddressSpace::from(0))
+                        .into(),
+                    codegen.context.i32_type().into(),
+                ],
+                false,
+            );
+            let callee = codegen
+                .module
+                .get_function("nyash_string_new")
+                .unwrap_or_else(|| codegen.module.add_function("nyash_string_new", fn_ty, None));
+            let call = codegen
+                .builder
+                .build_call(
+                    callee,
+                    &[gv.as_pointer_value().into(), len.into()],
+                    "strnew",
+                )
+                .map_err(|e| e.to_string())?;
+            call.try_as_basic_value()
+                .left()
+                .ok_or("nyash_string_new returned void".to_string())?
+        }
+        ConstValue::Null => codegen
+            .context
+            .ptr_type(inkwell::AddressSpace::from(0))
+            .const_null()
+            .into(),
+        ConstValue::Void => return Err("Const Void unsupported".to_string()),
+    };
+    vmap.insert(dst, bval);
+    Ok(())
+}