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nac3core/codegen: supports list iter

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This commit is contained in:
pca006132 2021-10-24 14:39:50 +08:00
parent fb92b6d364
commit 181607008d
1 changed files with 42 additions and 4 deletions
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46
nac3core/src/codegen/stmt.rs
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@ -102,6 +102,8 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
stmt: &Stmt<Option<Type>>,
) {
if let StmtKind::For { iter, target, body, orelse, .. } = &stmt.node {
let int32 = ctx.ctx.i32_type();
let zero = int32.const_zero();
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");
@ -117,7 +119,6 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
// setup
let iter_val = iter_val.into_pointer_value();
let i = generator.gen_store_target(ctx, target);
let int32 = ctx.ctx.i32_type();
let start;
let end;
let step;
@ -166,7 +167,11 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
"sign",
);
// add and test
let tmp = ctx.builder.build_int_add(ctx.builder.build_load(i, "i").into_int_value(), step, "start_loop");
let tmp = ctx.builder.build_int_add(
ctx.builder.build_load(i, "i").into_int_value(),
step,
"start_loop",
);
ctx.builder.build_store(i, tmp);
// // if step > 0, continue when i < end
let cmp1 = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, end, "cmp1");
@ -179,11 +184,44 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
body_bb,
orelse_bb,
);
ctx.builder.position_at_end(body_bb);
} else {
unimplemented!()
let counter = generator.gen_var_alloc(ctx, ctx.primitives.int32);
// counter = -1
ctx.builder.build_store(counter, ctx.ctx.i32_type().const_int(u64::max_value(), true));
let len = unsafe {
ctx.builder
.build_load(
ctx.builder.build_in_bounds_gep(
iter_val.into_pointer_value(),
&[zero, zero],
"len_ptr",
),
"len",
)
.into_int_value()
};
ctx.builder.build_unconditional_branch(test_bb);
ctx.builder.position_at_end(test_bb);
let tmp = ctx.builder.build_load(counter, "i").into_int_value();
let tmp = ctx.builder.build_int_add(tmp, int32.const_int(1, false), "inc");
ctx.builder.build_store(counter, tmp);
let cmp = ctx.builder.build_int_compare(inkwell::IntPredicate::SLT, tmp, len, "cmp");
ctx.builder.build_conditional_branch(cmp, body_bb, orelse_bb);
ctx.builder.position_at_end(body_bb);
unsafe {
let ptr_to_arr = ctx.builder.build_in_bounds_gep(
iter_val.into_pointer_value(),
&[zero, int32.const_int(1, false)],
"ptr_to_arr",
);
let arr_ptr = ctx.builder.build_load(ptr_to_arr, "loadptr").into_pointer_value();
let ptr = ctx.builder.build_gep(arr_ptr, &[tmp], "loadarrgep");
let val = ctx.builder.build_load(ptr, "loadarr");
generator.gen_assign(ctx, target, val);
}
}
ctx.builder.position_at_end(body_bb);
for stmt in body.iter() {
generator.gen_stmt(ctx, stmt);
}