2021-08-19 17:14:38 +08:00
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use super::{
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expr::{assert_int_val, assert_pointer_val},
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2021-10-16 22:17:36 +08:00
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CodeGenContext, CodeGenerator,
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2021-08-19 17:14:38 +08:00
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};
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2021-08-11 14:37:26 +08:00
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use crate::typecheck::typedef::Type;
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use inkwell::values::{BasicValue, BasicValueEnum, PointerValue};
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2021-08-09 15:39:50 +08:00
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use rustpython_parser::ast::{Expr, ExprKind, Stmt, StmtKind};
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2021-10-16 22:17:36 +08:00
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pub fn gen_var<'ctx, 'a>(ctx: &mut CodeGenContext<'ctx, 'a>, ty: Type) -> PointerValue<'ctx> {
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// put the alloca in init block
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let current = ctx.builder.get_insert_block().unwrap();
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// position before the last branching instruction...
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ctx.builder.position_before(&ctx.init_bb.get_last_instruction().unwrap());
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let ty = ctx.get_llvm_type(ty);
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let ptr = ctx.builder.build_alloca(ty, "tmp");
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ctx.builder.position_at_end(current);
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ptr
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}
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2021-08-09 15:39:50 +08:00
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2021-10-16 22:17:36 +08:00
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pub fn gen_store_target<'ctx, 'a, G: CodeGenerator + ?Sized>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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pattern: &Expr<Option<Type>>,
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) -> PointerValue<'ctx> {
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// very similar to gen_expr, but we don't do an extra load at the end
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// and we flatten nested tuples
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match &pattern.node {
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ExprKind::Name { id, .. } => ctx.var_assignment.get(id).cloned().unwrap_or_else(|| {
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let ptr = generator.gen_var_alloc(ctx, pattern.custom.unwrap());
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ctx.var_assignment.insert(*id, ptr);
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ptr
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}),
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ExprKind::Attribute { value, attr, .. } => {
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let index = ctx.get_attr_index(value.custom.unwrap(), *attr);
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let val = generator.gen_expr(ctx, value).unwrap();
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let ptr = if let BasicValueEnum::PointerValue(v) = val {
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v
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} else {
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unreachable!();
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};
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unsafe {
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ctx.builder.build_in_bounds_gep(
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ptr,
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&[
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ctx.ctx.i32_type().const_zero(),
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ctx.ctx.i32_type().const_int(index as u64, false),
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],
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"attr",
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)
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2021-08-09 15:39:50 +08:00
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}
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2021-10-16 22:17:36 +08:00
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}
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ExprKind::Subscript { value, slice, .. } => {
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let i32_type = ctx.ctx.i32_type();
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let v = assert_pointer_val(generator.gen_expr(ctx, value).unwrap());
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let index = assert_int_val(generator.gen_expr(ctx, slice).unwrap());
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unsafe {
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let ptr_to_arr = ctx.builder.build_in_bounds_gep(
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v,
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&[i32_type.const_zero(), i32_type.const_int(1, false)],
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"ptr_to_arr",
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);
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let arr_ptr = assert_pointer_val(ctx.builder.build_load(ptr_to_arr, "loadptr"));
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ctx.builder.build_gep(arr_ptr, &[index], "loadarrgep")
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2021-08-09 15:39:50 +08:00
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}
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2021-10-16 22:17:36 +08:00
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}
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_ => unreachable!(),
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}
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}
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pub fn gen_assign<'ctx, 'a, G: CodeGenerator + ?Sized>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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target: &Expr<Option<Type>>,
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value: BasicValueEnum<'ctx>,
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) {
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let i32_type = ctx.ctx.i32_type();
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if let ExprKind::Tuple { elts, .. } = &target.node {
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if let BasicValueEnum::PointerValue(ptr) = value {
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for (i, elt) in elts.iter().enumerate() {
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2021-08-19 17:14:38 +08:00
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unsafe {
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2021-10-16 22:17:36 +08:00
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let t = ctx.builder.build_in_bounds_gep(
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ptr,
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&[i32_type.const_zero(), i32_type.const_int(i as u64, false)],
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"elem",
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2021-08-19 17:14:38 +08:00
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);
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2021-10-16 22:17:36 +08:00
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let v = ctx.builder.build_load(t, "tmpload");
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generator.gen_assign(ctx, elt, v);
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2021-08-19 17:14:38 +08:00
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}
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}
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2021-10-16 22:17:36 +08:00
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} else {
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unreachable!()
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2021-08-09 15:39:50 +08:00
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}
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2021-10-16 22:17:36 +08:00
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} else {
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let ptr = generator.gen_store_target(ctx, target);
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ctx.builder.build_store(ptr, value);
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2021-08-09 15:39:50 +08:00
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}
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2021-10-16 22:17:36 +08:00
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}
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2021-08-09 15:39:50 +08:00
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2021-10-23 23:53:36 +08:00
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pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
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generator: &mut G,
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ctx: &mut CodeGenContext<'ctx, 'a>,
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stmt: &Stmt<Option<Type>>,
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) {
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if let StmtKind::For { iter, target, body, orelse, .. } = &stmt.node {
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let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
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let test_bb = ctx.ctx.append_basic_block(current, "test");
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let body_bb = ctx.ctx.append_basic_block(current, "body");
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let cont_bb = ctx.ctx.append_basic_block(current, "cont");
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// if there is no orelse, we just go to cont_bb
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let orelse_bb =
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if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "orelse") };
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// store loop bb information and restore it later
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let loop_bb = ctx.loop_bb.replace((test_bb, cont_bb));
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let iter_val = generator.gen_expr(ctx, iter).unwrap();
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if ctx.unifier.unioned(iter.custom.unwrap(), ctx.primitives.range) {
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// setup
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let iter_val = iter_val.into_pointer_value();
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let i = generator.gen_store_target(ctx, target);
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let int32 = ctx.ctx.i32_type();
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let start;
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let end;
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let step;
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unsafe {
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start = ctx
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.builder
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.build_load(
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ctx.builder.build_in_bounds_gep(
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iter_val,
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&[int32.const_zero(), int32.const_int(0, false)],
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"start_ptr",
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),
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"start",
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)
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.into_int_value();
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end = ctx
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.builder
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.build_load(
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ctx.builder.build_in_bounds_gep(
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iter_val,
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&[int32.const_zero(), int32.const_int(1, false)],
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"end_ptr",
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),
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"end",
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)
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.into_int_value();
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step = ctx
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.builder
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.build_load(
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ctx.builder.build_in_bounds_gep(
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iter_val,
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&[int32.const_zero(), int32.const_int(2, false)],
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"step_ptr",
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),
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"step",
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)
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.into_int_value();
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}
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ctx.builder.build_store(i, ctx.builder.build_int_sub(start, step, "start_init"));
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ctx.builder.build_unconditional_branch(test_bb);
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ctx.builder.position_at_end(test_bb);
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let sign = ctx.builder.build_int_compare(
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|
inkwell::IntPredicate::SGT,
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step,
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int32.const_zero(),
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"sign",
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);
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// add and test
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let tmp = ctx.builder.build_int_add(ctx.builder.build_load(i, "i").into_int_value(), step, "start_loop");
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|
|
ctx.builder.build_store(i, tmp);
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|
|
// // if step > 0, continue when i < end
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|
let cmp1 = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, end, "cmp1");
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|
|
// if step < 0, continue when i > end
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|
let cmp2 = ctx.builder.build_int_compare(inkwell::IntPredicate::SGT, tmp, end, "cmp2");
|
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|
let pos = ctx.builder.build_and(sign, cmp1, "pos");
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|
|
let neg = ctx.builder.build_and(ctx.builder.build_not(sign, "inv"), cmp2, "neg");
|
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|
|
ctx.builder.build_conditional_branch(
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ctx.builder.build_or(pos, neg, "or"),
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|
|
body_bb,
|
|
|
|
orelse_bb,
|
|
|
|
);
|
|
|
|
} else {
|
|
|
|
unimplemented!()
|
|
|
|
}
|
|
|
|
|
|
|
|
ctx.builder.position_at_end(body_bb);
|
|
|
|
for stmt in body.iter() {
|
|
|
|
generator.gen_stmt(ctx, stmt);
|
|
|
|
}
|
|
|
|
ctx.builder.build_unconditional_branch(test_bb);
|
|
|
|
if !orelse.is_empty() {
|
|
|
|
ctx.builder.position_at_end(orelse_bb);
|
|
|
|
for stmt in orelse.iter() {
|
|
|
|
generator.gen_stmt(ctx, stmt);
|
|
|
|
}
|
|
|
|
ctx.builder.build_unconditional_branch(cont_bb);
|
|
|
|
}
|
|
|
|
ctx.builder.position_at_end(cont_bb);
|
|
|
|
ctx.loop_bb = loop_bb;
|
|
|
|
} else {
|
|
|
|
unreachable!()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-10-16 22:17:36 +08:00
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|
pub fn gen_while<'ctx, 'a, G: CodeGenerator + ?Sized>(
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generator: &mut G,
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|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
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|
|
stmt: &Stmt<Option<Type>>,
|
|
|
|
) {
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|
|
if let StmtKind::While { test, body, orelse } = &stmt.node {
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|
let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
|
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|
let test_bb = ctx.ctx.append_basic_block(current, "test");
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|
let body_bb = ctx.ctx.append_basic_block(current, "body");
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|
let cont_bb = ctx.ctx.append_basic_block(current, "cont");
|
|
|
|
// if there is no orelse, we just go to cont_bb
|
|
|
|
let orelse_bb =
|
|
|
|
if orelse.is_empty() { cont_bb } else { ctx.ctx.append_basic_block(current, "orelse") };
|
|
|
|
// store loop bb information and restore it later
|
|
|
|
let loop_bb = ctx.loop_bb.replace((test_bb, cont_bb));
|
|
|
|
ctx.builder.build_unconditional_branch(test_bb);
|
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|
|
ctx.builder.position_at_end(test_bb);
|
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|
|
let test = generator.gen_expr(ctx, test).unwrap();
|
|
|
|
if let BasicValueEnum::IntValue(test) = test {
|
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|
|
ctx.builder.build_conditional_branch(test, body_bb, orelse_bb);
|
2021-08-09 15:39:50 +08:00
|
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} else {
|
2021-10-16 22:17:36 +08:00
|
|
|
unreachable!()
|
|
|
|
};
|
|
|
|
ctx.builder.position_at_end(body_bb);
|
|
|
|
for stmt in body.iter() {
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|
|
|
generator.gen_stmt(ctx, stmt);
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|
|
|
}
|
|
|
|
ctx.builder.build_unconditional_branch(test_bb);
|
|
|
|
if !orelse.is_empty() {
|
|
|
|
ctx.builder.position_at_end(orelse_bb);
|
|
|
|
for stmt in orelse.iter() {
|
|
|
|
generator.gen_stmt(ctx, stmt);
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|
|
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}
|
|
|
|
ctx.builder.build_unconditional_branch(cont_bb);
|
2021-08-09 15:39:50 +08:00
|
|
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}
|
2021-10-16 22:17:36 +08:00
|
|
|
ctx.builder.position_at_end(cont_bb);
|
|
|
|
ctx.loop_bb = loop_bb;
|
|
|
|
} else {
|
|
|
|
unreachable!()
|
2021-08-09 15:39:50 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
}
|
2021-08-09 15:39:50 +08:00
|
|
|
|
2021-10-16 22:17:36 +08:00
|
|
|
pub fn gen_if<'ctx, 'a, G: CodeGenerator + ?Sized>(
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|
|
|
generator: &mut G,
|
|
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
|
|
stmt: &Stmt<Option<Type>>,
|
|
|
|
) -> bool {
|
|
|
|
if let StmtKind::If { test, body, orelse } = &stmt.node {
|
|
|
|
let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
|
|
|
|
let test_bb = ctx.ctx.append_basic_block(current, "test");
|
|
|
|
let body_bb = ctx.ctx.append_basic_block(current, "body");
|
|
|
|
let mut cont_bb = None;
|
|
|
|
// if there is no orelse, we just go to cont_bb
|
|
|
|
let orelse_bb = if orelse.is_empty() {
|
|
|
|
cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
|
|
|
|
cont_bb.unwrap()
|
|
|
|
} else {
|
|
|
|
ctx.ctx.append_basic_block(current, "orelse")
|
|
|
|
};
|
|
|
|
ctx.builder.build_unconditional_branch(test_bb);
|
|
|
|
ctx.builder.position_at_end(test_bb);
|
|
|
|
let test = generator.gen_expr(ctx, test).unwrap();
|
|
|
|
if let BasicValueEnum::IntValue(test) = test {
|
|
|
|
ctx.builder.build_conditional_branch(test, body_bb, orelse_bb);
|
|
|
|
} else {
|
|
|
|
unreachable!()
|
|
|
|
};
|
|
|
|
ctx.builder.position_at_end(body_bb);
|
|
|
|
let mut exited = false;
|
|
|
|
for stmt in body.iter() {
|
|
|
|
exited = generator.gen_stmt(ctx, stmt);
|
|
|
|
if exited {
|
|
|
|
break;
|
2021-08-09 16:10:17 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
}
|
|
|
|
if !exited {
|
|
|
|
if cont_bb.is_none() {
|
|
|
|
cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
|
2021-08-19 15:30:15 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
ctx.builder.build_unconditional_branch(cont_bb.unwrap());
|
|
|
|
}
|
|
|
|
let then_exited = exited;
|
|
|
|
let else_exited = if !orelse.is_empty() {
|
|
|
|
exited = false;
|
|
|
|
ctx.builder.position_at_end(orelse_bb);
|
|
|
|
for stmt in orelse.iter() {
|
|
|
|
exited = generator.gen_stmt(ctx, stmt);
|
|
|
|
if exited {
|
|
|
|
break;
|
2021-08-27 11:46:12 +08:00
|
|
|
}
|
2021-08-09 16:10:17 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
if !exited {
|
|
|
|
if cont_bb.is_none() {
|
|
|
|
cont_bb = Some(ctx.ctx.append_basic_block(current, "cont"));
|
2021-08-09 16:10:17 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
ctx.builder.build_unconditional_branch(cont_bb.unwrap());
|
2021-08-09 16:10:17 +08:00
|
|
|
}
|
2021-10-16 22:17:36 +08:00
|
|
|
exited
|
|
|
|
} else {
|
|
|
|
false
|
2021-08-19 15:30:15 +08:00
|
|
|
};
|
2021-10-16 22:17:36 +08:00
|
|
|
if let Some(cont_bb) = cont_bb {
|
|
|
|
ctx.builder.position_at_end(cont_bb);
|
|
|
|
}
|
|
|
|
then_exited && else_exited
|
|
|
|
} else {
|
|
|
|
unreachable!()
|
2021-08-09 15:39:50 +08:00
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}
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|
|
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}
|
2021-10-16 22:17:36 +08:00
|
|
|
|
|
|
|
pub fn gen_stmt<'ctx, 'a, G: CodeGenerator + ?Sized>(
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|
|
|
generator: &mut G,
|
|
|
|
ctx: &mut CodeGenContext<'ctx, 'a>,
|
|
|
|
stmt: &Stmt<Option<Type>>,
|
|
|
|
) -> bool {
|
|
|
|
match &stmt.node {
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|
|
|
StmtKind::Pass => {}
|
|
|
|
StmtKind::Expr { value } => {
|
|
|
|
generator.gen_expr(ctx, value);
|
|
|
|
}
|
|
|
|
StmtKind::Return { value } => {
|
|
|
|
let value = value.as_ref().map(|v| generator.gen_expr(ctx, v).unwrap());
|
|
|
|
let value = value.as_ref().map(|v| v as &dyn BasicValue);
|
|
|
|
ctx.builder.build_return(value);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
StmtKind::AnnAssign { target, value, .. } => {
|
|
|
|
if let Some(value) = value {
|
|
|
|
let value = generator.gen_expr(ctx, value).unwrap();
|
|
|
|
generator.gen_assign(ctx, target, value);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
StmtKind::Assign { targets, value, .. } => {
|
|
|
|
let value = generator.gen_expr(ctx, value).unwrap();
|
|
|
|
for target in targets.iter() {
|
|
|
|
generator.gen_assign(ctx, target, value);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
StmtKind::Continue => {
|
|
|
|
ctx.builder.build_unconditional_branch(ctx.loop_bb.unwrap().0);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
StmtKind::Break => {
|
|
|
|
ctx.builder.build_unconditional_branch(ctx.loop_bb.unwrap().1);
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
StmtKind::If { .. } => return generator.gen_if(ctx, stmt),
|
|
|
|
StmtKind::While { .. } => return generator.gen_while(ctx, stmt),
|
2021-10-23 23:53:36 +08:00
|
|
|
StmtKind::For { .. } => return generator.gen_for(ctx, stmt),
|
|
|
|
_ => unimplemented!(),
|
2021-10-16 22:17:36 +08:00
|
|
|
};
|
|
|
|
false
|
|
|
|
}
|