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nac3core/codegen: cleanup

escape-analysis
pca006132 2021-10-24 14:52:21 +08:00
parent 181607008d
commit 45673b0ecc
2 changed files with 101 additions and 170 deletions
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170
nac3core/src/codegen/expr.rs
View File

@ -15,27 +15,21 @@ use inkwell::{
AddressSpace,
};
use itertools::{chain, izip, zip, Itertools};
use rustpython_parser::ast::{self, Boolop, Constant, Expr, ExprKind, Operator, StrRef};
use rustpython_parser::ast::{
self, Boolop, Comprehension, Constant, Expr, ExprKind, Operator, StrRef,
};
use super::CodeGenerator;
pub fn assert_int_val(val: BasicValueEnum<'_>) -> IntValue<'_> {
if let BasicValueEnum::IntValue(v) = val {
v
} else {
unreachable!()
}
}
pub fn assert_pointer_val(val: BasicValueEnum<'_>) -> PointerValue<'_> {
if let BasicValueEnum::PointerValue(v) = val {
v
} else {
unreachable!()
}
}
impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
pub fn build_gep_and_load(
&mut self,
ptr: PointerValue<'ctx>,
index: &[IntValue<'ctx>],
) -> BasicValueEnum<'ctx> {
unsafe { self.builder.build_load(self.builder.build_gep(ptr, index, "gep"), "load") }
}
fn get_subst_key(
&mut self,
obj: Option<Type>,
@ -374,12 +368,55 @@ pub fn gen_call<'ctx, 'a, G: CodeGenerator + ?Sized>(
ctx.builder.build_call(fun_val, &params, "call").try_as_basic_value().left()
}
pub fn destructure_range<'ctx, 'a>(
ctx: &mut CodeGenContext<'ctx, 'a>,
range: PointerValue<'ctx>,
) -> (IntValue<'ctx>, IntValue<'ctx>, IntValue<'ctx>) {
let int32 = ctx.ctx.i32_type();
let start = ctx
.build_gep_and_load(range, &[int32.const_zero(), int32.const_int(0, false)])
.into_int_value();
let end = ctx
.build_gep_and_load(range, &[int32.const_zero(), int32.const_int(1, false)])
.into_int_value();
let step = ctx
.build_gep_and_load(range, &[int32.const_zero(), int32.const_int(2, false)])
.into_int_value();
(start, end, step)
}
pub fn allocate_list<'ctx, 'a>(
ctx: &mut CodeGenContext<'ctx, 'a>,
ty: BasicTypeEnum<'ctx>,
length: IntValue<'ctx>,
) -> PointerValue<'ctx> {
let arr_ptr = ctx.builder.build_array_alloca(ty, length, "tmparr");
let arr_ty = ctx.ctx.struct_type(
&[ctx.ctx.i32_type().into(), ty.ptr_type(AddressSpace::Generic).into()],
false,
);
let zero = ctx.ctx.i32_type().const_zero();
let arr_str_ptr = ctx.builder.build_alloca(arr_ty, "tmparrstr");
unsafe {
let len_ptr = ctx.builder.build_in_bounds_gep(arr_str_ptr, &[zero, zero], "len_ptr");
ctx.builder.build_store(len_ptr, length);
let ptr_to_arr = ctx.builder.build_in_bounds_gep(
arr_str_ptr,
&[zero, ctx.ctx.i32_type().const_int(1, false)],
"ptr_to_arr",
);
ctx.builder.build_store(ptr_to_arr, arr_ptr);
arr_str_ptr
}
}
pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
generator: &mut G,
ctx: &mut CodeGenContext<'ctx, 'a>,
expr: &Expr<Option<Type>>,
) -> Option<BasicValueEnum<'ctx>> {
let zero = ctx.ctx.i32_type().const_int(0, false);
let int32 = ctx.ctx.i32_type();
let zero = int32.const_int(0, false);
Some(match &expr.node {
ExprKind::Constant { value, .. } => {
let ty = expr.custom.unwrap();
@ -398,39 +435,17 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
// this shall be optimized later for constant primitive lists...
// we should use memcpy for that instead of generating thousands of stores
let elements = elts.iter().map(|x| generator.gen_expr(ctx, x).unwrap()).collect_vec();
let ty = if elements.is_empty() {
ctx.ctx.i32_type().into()
} else {
elements[0].get_type()
};
let arr_ptr = ctx.builder.build_array_alloca(
ty,
ctx.ctx.i32_type().const_int(elements.len() as u64, false),
"tmparr",
);
let arr_ty = ctx.ctx.struct_type(
&[ctx.ctx.i32_type().into(), ty.ptr_type(AddressSpace::Generic).into()],
false,
);
let arr_str_ptr = ctx.builder.build_alloca(arr_ty, "tmparrstr");
let ty = if elements.is_empty() { int32.into() } else { elements[0].get_type() };
let length = int32.const_int(elements.len() as u64, false);
let arr_str_ptr = allocate_list(ctx, ty, length);
let arr_ptr = ctx
.build_gep_and_load(arr_str_ptr, &[zero, int32.const_int(1, false)])
.into_pointer_value();
unsafe {
let len_ptr =
ctx.builder.build_in_bounds_gep(arr_str_ptr, &[zero, zero], "len_ptr");
ctx.builder.build_store(
len_ptr,
ctx.ctx.i32_type().const_int(elements.len() as u64, false),
);
let ptr_to_arr = ctx.builder.build_in_bounds_gep(
arr_str_ptr,
&[zero, ctx.ctx.i32_type().const_int(1, false)],
"ptr_to_arr",
);
ctx.builder.build_store(ptr_to_arr, arr_ptr);
let i32_type = ctx.ctx.i32_type();
for (i, v) in elements.iter().enumerate() {
let elem_ptr = ctx.builder.build_in_bounds_gep(
let elem_ptr = ctx.builder.build_gep(
arr_ptr,
&[i32_type.const_int(i as u64, false)],
&[int32.const_int(i as u64, false)],
"elem_ptr",
);
ctx.builder.build_store(elem_ptr, *v);
@ -448,7 +463,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
unsafe {
let ptr = ctx.builder.build_in_bounds_gep(
tuple_ptr,
&[zero, ctx.ctx.i32_type().const_int(i as u64, false)],
&[zero, int32.const_int(i as u64, false)],
"ptr",
);
ctx.builder.build_store(ptr, v);
@ -459,20 +474,12 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
ExprKind::Attribute { value, attr, .. } => {
// note that we would handle class methods directly in calls
let index = ctx.get_attr_index(value.custom.unwrap(), *attr);
let val = generator.gen_expr(ctx, value).unwrap();
let ptr = assert_pointer_val(val);
unsafe {
let ptr = ctx.builder.build_in_bounds_gep(
ptr,
&[zero, ctx.ctx.i32_type().const_int(index as u64, false)],
"attr",
);
ctx.builder.build_load(ptr, "field")
}
let ptr = generator.gen_expr(ctx, value).unwrap().into_pointer_value();
ctx.build_gep_and_load(ptr, &[zero, int32.const_int(index as u64, false)])
}
ExprKind::BoolOp { op, values } => {
// requires conditional branches for short-circuiting...
let left = assert_int_val(generator.gen_expr(ctx, &values[0]).unwrap());
let left = generator.gen_expr(ctx, &values[0]).unwrap().into_int_value();
let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
let a_bb = ctx.ctx.append_basic_block(current, "a");
let b_bb = ctx.ctx.append_basic_block(current, "b");
@ -484,13 +491,13 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
let a = ctx.ctx.bool_type().const_int(1, false);
ctx.builder.build_unconditional_branch(cont_bb);
ctx.builder.position_at_end(b_bb);
let b = assert_int_val(generator.gen_expr(ctx, &values[1]).unwrap());
let b = generator.gen_expr(ctx, &values[1]).unwrap().into_int_value();
ctx.builder.build_unconditional_branch(cont_bb);
(a, b)
}
Boolop::And => {
ctx.builder.position_at_end(a_bb);
let a = assert_int_val(generator.gen_expr(ctx, &values[1]).unwrap());
let a = generator.gen_expr(ctx, &values[1]).unwrap().into_int_value();
ctx.builder.build_unconditional_branch(cont_bb);
ctx.builder.position_at_end(b_bb);
let b = ctx.ctx.bool_type().const_int(0, false);
@ -524,7 +531,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
let ty = ctx.unifier.get_representative(operand.custom.unwrap());
let val = generator.gen_expr(ctx, operand).unwrap();
if ty == ctx.primitives.bool {
let val = assert_int_val(val);
let val = val.into_int_value();
match op {
ast::Unaryop::Invert | ast::Unaryop::Not => {
ctx.builder.build_not(val, "not").into()
@ -532,7 +539,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
_ => val.into(),
}
} else if [ctx.primitives.int32, ctx.primitives.int64].contains(&ty) {
let val = assert_int_val(val);
let val = val.into_int_value();
match op {
ast::Unaryop::USub => ctx.builder.build_int_neg(val, "neg").into(),
ast::Unaryop::Invert => ctx.builder.build_not(val, "not").into(),
@ -627,7 +634,7 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
.into() // as there should be at least 1 element, it should never be none
}
ExprKind::IfExp { test, body, orelse } => {
let test = assert_int_val(generator.gen_expr(ctx, test).unwrap());
let test = generator.gen_expr(ctx, test).unwrap().into_int_value();
let current = ctx.builder.get_insert_block().unwrap().get_parent().unwrap();
let then_bb = ctx.ctx.append_basic_block(current, "then");
let else_bb = ctx.ctx.append_basic_block(current, "else");
@ -712,33 +719,16 @@ pub fn gen_expr<'ctx, 'a, G: CodeGenerator + ?Sized>(
unimplemented!()
} else {
// TODO: bound check
let i32_type = ctx.ctx.i32_type();
let v = assert_pointer_val(generator.gen_expr(ctx, value).unwrap());
let index = assert_int_val(generator.gen_expr(ctx, slice).unwrap());
unsafe {
let ptr_to_arr = ctx.builder.build_in_bounds_gep(
v,
&[i32_type.const_zero(), i32_type.const_int(1, false)],
"ptr_to_arr",
);
let arr_ptr =
assert_pointer_val(ctx.builder.build_load(ptr_to_arr, "loadptr"));
let ptr = ctx.builder.build_gep(arr_ptr, &[index], "loadarrgep");
ctx.builder.build_load(ptr, "loadarr")
}
let v = generator.gen_expr(ctx, value).unwrap().into_pointer_value();
let index = generator.gen_expr(ctx, slice).unwrap().into_int_value();
let arr_ptr =
ctx.build_gep_and_load(v, &[int32.const_zero(), int32.const_int(1, false)]);
ctx.build_gep_and_load(arr_ptr.into_pointer_value(), &[index])
}
} else {
let i32_type = ctx.ctx.i32_type();
let v = assert_pointer_val(generator.gen_expr(ctx, value).unwrap());
let index = assert_int_val(generator.gen_expr(ctx, slice).unwrap());
unsafe {
let ptr_to_elem = ctx.builder.build_in_bounds_gep(
v,
&[i32_type.const_zero(), index],
"ptr_to_elem",
);
ctx.builder.build_load(ptr_to_elem, "loadelem")
}
let v = generator.gen_expr(ctx, value).unwrap().into_pointer_value();
let index = generator.gen_expr(ctx, slice).unwrap().into_int_value();
ctx.build_gep_and_load(v, &[int32.const_zero(), index])
}
}
_ => unimplemented!(),

101
nac3core/src/codegen/stmt.rs
View File

@ -1,7 +1,4 @@
use super::{
expr::{assert_int_val, assert_pointer_val},
CodeGenContext, CodeGenerator,
};
use super::{expr::destructure_range, CodeGenContext, CodeGenerator};
use crate::typecheck::typedef::Type;
use inkwell::values::{BasicValue, BasicValueEnum, PointerValue};
use rustpython_parser::ast::{Expr, ExprKind, Stmt, StmtKind};
@ -51,15 +48,12 @@ pub fn gen_store_target<'ctx, 'a, G: CodeGenerator + ?Sized>(
}
ExprKind::Subscript { value, slice, .. } => {
let i32_type = ctx.ctx.i32_type();
let v = assert_pointer_val(generator.gen_expr(ctx, value).unwrap());
let index = assert_int_val(generator.gen_expr(ctx, slice).unwrap());
let v = generator.gen_expr(ctx, value).unwrap().into_pointer_value();
let index = generator.gen_expr(ctx, slice).unwrap().into_int_value();
unsafe {
let ptr_to_arr = ctx.builder.build_in_bounds_gep(
v,
&[i32_type.const_zero(), i32_type.const_int(1, false)],
"ptr_to_arr",
);
let arr_ptr = assert_pointer_val(ctx.builder.build_load(ptr_to_arr, "loadptr"));
let arr_ptr = ctx
.build_gep_and_load(v, &[i32_type.const_zero(), i32_type.const_int(1, false)])
.into_pointer_value();
ctx.builder.build_gep(arr_ptr, &[index], "loadarrgep")
}
}
@ -77,15 +71,11 @@ pub fn gen_assign<'ctx, 'a, G: CodeGenerator + ?Sized>(
if let ExprKind::Tuple { elts, .. } = &target.node {
if let BasicValueEnum::PointerValue(ptr) = value {
for (i, elt) in elts.iter().enumerate() {
unsafe {
let t = ctx.builder.build_in_bounds_gep(
ptr,
&[i32_type.const_zero(), i32_type.const_int(i as u64, false)],
"elem",
);
let v = ctx.builder.build_load(t, "tmpload");
generator.gen_assign(ctx, elt, v);
}
let v = ctx.build_gep_and_load(
ptr,
&[i32_type.const_zero(), i32_type.const_int(i as u64, false)],
);
generator.gen_assign(ctx, elt, v);
}
} else {
unreachable!()
@ -119,44 +109,7 @@ 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 start;
let end;
let step;
unsafe {
start = ctx
.builder
.build_load(
ctx.builder.build_in_bounds_gep(
iter_val,
&[int32.const_zero(), int32.const_int(0, false)],
"start_ptr",
),
"start",
)
.into_int_value();
end = ctx
.builder
.build_load(
ctx.builder.build_in_bounds_gep(
iter_val,
&[int32.const_zero(), int32.const_int(1, false)],
"end_ptr",
),
"end",
)
.into_int_value();
step = ctx
.builder
.build_load(
ctx.builder.build_in_bounds_gep(
iter_val,
&[int32.const_zero(), int32.const_int(2, false)],
"step_ptr",
),
"step",
)
.into_int_value();
}
let (start, end, step) = destructure_range(ctx, iter_val);
ctx.builder.build_store(i, ctx.builder.build_int_sub(start, step, "start_init"));
ctx.builder.build_unconditional_branch(test_bb);
ctx.builder.position_at_end(test_bb);
@ -189,18 +142,9 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
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()
};
let len = ctx
.build_gep_and_load(iter_val.into_pointer_value(), &[zero, zero])
.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();
@ -209,17 +153,14 @@ pub fn gen_for<'ctx, 'a, G: CodeGenerator + ?Sized>(
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(
let arr_ptr = ctx
.build_gep_and_load(
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);
}
)
.into_pointer_value();
let val = ctx.build_gep_and_load(arr_ptr, &[tmp]);
generator.gen_assign(ctx, target, val);
}
for stmt in body.iter() {