127 lines
3.8 KiB
Rust
127 lines
3.8 KiB
Rust
use std::collections::HashMap;
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use inkwell::{
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basic_block::BasicBlock,
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values::{BasicValueEnum as BVE, FloatValue, IntValue, PointerValue},
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};
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use crate::backend::llvm::context::CodegenContext;
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use crate::mir::{function::MirFunction, BasicBlockId, ValueId};
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use super::{builder_cursor::BuilderCursor, Resolver};
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pub type LlResult<T> = Result<T, String>;
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/// Per-function lowering context that centralizes access to codegen utilities and
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/// enforces Resolver-only value access.
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pub struct LowerFnCtx<'ctx, 'b> {
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pub codegen: &'ctx CodegenContext<'ctx>,
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pub func: &'b MirFunction,
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pub cursor: &'b mut BuilderCursor<'ctx, 'b>,
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pub resolver: &'b mut Resolver<'ctx>,
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pub vmap: &'b mut HashMap<ValueId, BVE<'ctx>>,
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pub bb_map: &'b HashMap<BasicBlockId, BasicBlock<'ctx>>,
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pub preds: &'b HashMap<BasicBlockId, Vec<BasicBlockId>>,
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pub block_end_values: &'b HashMap<BasicBlockId, HashMap<ValueId, BVE<'ctx>>>,
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// Optional extras commonly needed by some paths
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pub box_type_ids: Option<&'b HashMap<String, i64>>,
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pub const_strs: Option<&'b HashMap<ValueId, String>>,
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// Dev flag: extra runtime assertions
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pub dev_checks: bool,
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}
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impl<'ctx, 'b> LowerFnCtx<'ctx, 'b> {
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pub fn new(
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codegen: &'ctx CodegenContext<'ctx>,
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func: &'b MirFunction,
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cursor: &'b mut BuilderCursor<'ctx, 'b>,
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resolver: &'b mut Resolver<'ctx>,
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vmap: &'b mut HashMap<ValueId, BVE<'ctx>>,
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bb_map: &'b HashMap<BasicBlockId, BasicBlock<'ctx>>,
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preds: &'b HashMap<BasicBlockId, Vec<BasicBlockId>>,
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block_end_values: &'b HashMap<BasicBlockId, HashMap<ValueId, BVE<'ctx>>>,
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) -> Self {
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let dev_checks = std::env::var("NYASH_DEV_CHECKS").ok().as_deref() == Some("1");
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Self {
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codegen,
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func,
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cursor,
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resolver,
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vmap,
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bb_map,
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preds,
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block_end_values,
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box_type_ids: None,
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const_strs: None,
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dev_checks,
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}
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}
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pub fn with_box_type_ids(mut self, ids: &'b HashMap<String, i64>) -> Self {
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self.box_type_ids = Some(ids);
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self
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}
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pub fn with_const_strs(mut self, m: &'b HashMap<ValueId, String>) -> Self {
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self.const_strs = Some(m);
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self
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}
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#[inline]
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pub fn ensure_i64(&mut self, blk: &BlockCtx<'ctx>, v: ValueId) -> LlResult<IntValue<'ctx>> {
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self.cursor.assert_open(blk.cur_bid);
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self.resolver.resolve_i64(
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self.codegen,
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self.cursor,
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blk.cur_bid,
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v,
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self.bb_map,
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self.preds,
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self.block_end_values,
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self.vmap,
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)
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}
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#[inline]
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pub fn ensure_ptr(&mut self, blk: &BlockCtx<'ctx>, v: ValueId) -> LlResult<PointerValue<'ctx>> {
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self.cursor.assert_open(blk.cur_bid);
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self.resolver.resolve_ptr(
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self.codegen,
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self.cursor,
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blk.cur_bid,
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v,
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self.bb_map,
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self.preds,
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self.block_end_values,
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self.vmap,
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)
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}
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#[inline]
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pub fn ensure_f64(&mut self, blk: &BlockCtx<'ctx>, v: ValueId) -> LlResult<FloatValue<'ctx>> {
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self.cursor.assert_open(blk.cur_bid);
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self.resolver.resolve_f64(
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self.codegen,
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self.cursor,
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blk.cur_bid,
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v,
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self.bb_map,
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self.preds,
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self.block_end_values,
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self.vmap,
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)
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}
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}
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/// Per-basic-block context to keep insertion site and block identity together.
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pub struct BlockCtx<'ctx> {
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pub cur_bid: BasicBlockId,
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pub cur_llbb: BasicBlock<'ctx>,
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}
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impl<'ctx> BlockCtx<'ctx> {
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pub fn new(cur_bid: BasicBlockId, cur_llbb: BasicBlock<'ctx>) -> Self {
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Self { cur_bid, cur_llbb }
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}
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}
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