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//! Displaying IR.
use super::{Func, FuncDecl, FunctionBody, Module, SourceLoc, ValueDef};
use crate::entity::EntityRef;
use std::collections::HashMap;
use std::fmt::{self, Display, Formatter, Result as FmtResult};
/// Hooks to print information after instruction, before and after blocks
/// and before and after functions.
pub trait PrintDecorator {
/// Print arbitrary text after an instruction.
///
/// Invoked after every instruction in a block. The instruction has already been printed on its own line;
/// this method can print content after the operator, if desired.
fn after_inst(&self, _value: super::Value, _f: &mut fmt::Formatter) -> fmt::Result {
Ok(())
}
/// Print arbitrary text before the body of a block.
///
/// Invoked before the block body. The block id and parameters have already been printed on its own line;
/// this method can print content on the line below the block id, before the body of the block is printed, if desired.
fn before_block(&self, _block: super::Block, _f: &mut fmt::Formatter) -> fmt::Result {
Ok(())
}
/// Print arbitrary text after the body of a block.
///
/// Invoked after the block body, before the terminator. The block body has already been printed on its own line(s);
/// this method can print content on the line after the last instruction in the block body, before the terminator is printed.
fn after_block(&self, _block: super::Block, _f: &mut fmt::Formatter) -> fmt::Result {
Ok(())
}
/// Print arbitrary text before the body of a function.
///
/// Invoked before the function body is printed. The function id and signature have already been printed on its own line;
/// this method can print content on the line before the function signature line, before the function body is printed.
fn before_function_body(&self, _f: &mut fmt::Formatter) -> fmt::Result {
Ok(())
}
/// Print arbitrary text after the body of a function.
///
/// Invoked after the function body is printed. The function body has already been printed;
/// this method can print content on the line after the return block of the function, before the last curly brace to end the function is printed.
fn after_function_body(&self, _f: &mut fmt::Formatter) -> fmt::Result {
Ok(())
}
}
#[derive(Default)]
pub(crate) struct NOPPrintDecorator();
impl PrintDecorator for NOPPrintDecorator {}
/// A wrapper around a `FunctionBody` together with some auxiliary
/// information to perform a pretty-print of that function.
pub struct FunctionBodyDisplay<'a, PD: PrintDecorator> {
pub(crate) body: &'a FunctionBody,
pub(crate) indent: &'a str,
pub(crate) verbose: bool,
pub(crate) module: Option<&'a Module<'a>>,
pub(crate) decorator: Option<&'a PD>,
}
impl<'a, PD: PrintDecorator> Display for FunctionBodyDisplay<'a, PD> {
fn fmt(&self, f: &mut Formatter) -> FmtResult {
let arg_tys = self
.body
.locals
.values()
.take(self.body.n_params)
.map(|&ty| format!("{}", ty))
.collect::<Vec<_>>();
let ret_tys = self
.body
.rets
.iter()
.map(|&ty| format!("{}", ty))
.collect::<Vec<_>>();
writeln!(
f,
"{}function({}) -> {} {{",
self.indent,
arg_tys.join(", "),
ret_tys.join(", ")
)?;
if let Some(decorator) = self.decorator {
decorator.before_function_body(f)?;
}
for (value, value_def) in self.body.values.entries() {
match value_def {
ValueDef::Operator(op, args, tys) if self.verbose => {
writeln!(
f,
"{} {} = {} {} # {} ",
self.indent,
value,
op,
self.body.arg_pool[*args]
.iter()
.map(|arg| format!("{}", arg))
.collect::<Vec<_>>()
.join(", "),
self.body.type_pool[*tys]
.iter()
.map(|arg| format!("{}", arg))
.collect::<Vec<_>>()
.join(", "),
)?;
}
ValueDef::BlockParam(block, idx, ty) if self.verbose => writeln!(
f,
"{} {} = blockparam {}, {} # {}",
self.indent, value, block, idx, ty
)?,
ValueDef::Alias(alias_target) => {
if self.verbose {
writeln!(f, "{} {} = {}", self.indent, value, alias_target)?
}
}
ValueDef::PickOutput(val, idx, ty) => {
writeln!(f, "{} {} = {}.{} # {}", self.indent, value, val, idx, ty)?
}
ValueDef::Placeholder(ty) => {
writeln!(f, "{} {} = placeholder # {}", self.indent, value, ty)?
}
ValueDef::None => writeln!(f, "{} {} = none", self.indent, value)?,
_ => {}
}
}
for (block_id, block) in self.body.blocks.entries() {
let block_params = block
.params
.iter()
.map(|(ty, val)| format!("{}: {}", val, ty))
.collect::<Vec<_>>();
writeln!(
f,
"{} {}({}): # {}",
self.indent,
block_id,
block_params.join(", "),
block.desc
)?;
if let Some(decorator) = self.decorator {
decorator.before_block(block_id, f)?
};
writeln!(
f,
"{} # preds: {}",
self.indent,
block
.preds
.iter()
.map(|pred| format!("{} ({})", pred, self.body.blocks[*pred].desc))
.collect::<Vec<_>>()
.join(", ")
)?;
writeln!(
f,
"{} # succs: {}",
self.indent,
block
.succs
.iter()
.map(|succ| format!("{} ({})", succ, self.body.blocks[*succ].desc))
.collect::<Vec<_>>()
.join(", ")
)?;
for (_, param) in &block.params {
if let Some(local) = self.body.value_locals[*param] {
writeln!(f, "{} # {}: {}", self.indent, param, local)?;
}
}
for &inst in &block.insts {
if let Some(local) = self.body.value_locals[inst] {
writeln!(f, "{} # {}: {}", self.indent, inst, local)?;
}
match &self.body.values[inst] {
ValueDef::Operator(op, args, tys) => {
let args = self.body.arg_pool[*args]
.iter()
.map(|&v| format!("{}", v))
.collect::<Vec<_>>();
let tys = self.body.type_pool[*tys]
.iter()
.map(|&ty| format!("{}", ty))
.collect::<Vec<_>>();
let loc = if self.body.source_locs[inst] != SourceLoc::invalid()
&& self.module.is_some()
{
let module = self.module.as_ref().unwrap();
let loc = self.body.source_locs[inst];
let data = &module.debug.source_locs[loc];
let filename = &module.debug.source_files[data.file];
format!("@{} {}:{}:{}", loc, filename, data.line, data.col)
} else {
"".to_owned()
};
write!(
f,
"{} {} = {} {} # {} {} ",
self.indent,
inst,
op,
args.join(", "),
tys.join(", "),
loc,
)?;
if let Some(decorator) = self.decorator {
decorator.after_inst(inst, f)?;
}
writeln!(f, "")?;
}
ValueDef::PickOutput(val, idx, ty) => {
writeln!(f, "{} {} = {}.{} # {}", self.indent, inst, val, idx, ty)?;
}
ValueDef::Alias(val) => {
writeln!(f, "{} {} = {}", self.indent, inst, val)?;
}
_ => unreachable!(),
}
}
if let Some(decorator) = self.decorator {
decorator.after_block(block_id, f)?;
}
writeln!(f, "{} {}", self.indent, block.terminator)?;
}
if let Some(decorator) = self.decorator {
decorator.after_function_body(f)?;
}
writeln!(f, "{}}}", self.indent)?;
Ok(())
}
}
pub struct ModuleDisplay<'a, PD: PrintDecorator> {
pub(crate) module: &'a Module<'a>,
pub(crate) decorators: Option<Box<dyn Fn(Func) -> PD>>,
}
impl<'a, PD: PrintDecorator> Display for ModuleDisplay<'a, PD> {
fn fmt(&self, f: &mut Formatter) -> FmtResult {
writeln!(f, "module {{")?;
if let Some(func) = self.module.start_func {
writeln!(f, " start = {}", func)?;
}
let mut sig_strs = HashMap::new();
for (sig, sig_data) in self.module.signatures.entries() {
let arg_tys = sig_data
.params
.iter()
.map(|&ty| format!("{}", ty))
.collect::<Vec<_>>();
let ret_tys = sig_data
.returns
.iter()
.map(|&ty| format!("{}", ty))
.collect::<Vec<_>>();
let sig_str = format!("{} -> {}", arg_tys.join(", "), ret_tys.join(", "));
sig_strs.insert(sig, sig_str.clone());
writeln!(f, " {}: {}", sig, sig_str)?;
}
for (global, global_data) in self.module.globals.entries() {
writeln!(
f,
" {}: {:?} # {}",
global, global_data.value, global_data.ty
)?;
}
for (table, table_data) in self.module.tables.entries() {
writeln!(f, " {}: {}", table, table_data.ty)?;
if let Some(funcs) = &table_data.func_elements {
for (i, &func) in funcs.iter().enumerate() {
writeln!(f, " {}[{}]: {}", table, i, func)?;
}
}
}
for (memory, memory_data) in self.module.memories.entries() {
writeln!(
f,
" {}: initial {} max {:?}",
memory, memory_data.initial_pages, memory_data.maximum_pages
)?;
for seg in &memory_data.segments {
writeln!(
f,
" {} offset {}: # {} bytes",
memory,
seg.offset,
seg.data.len()
)?;
}
}
for import in &self.module.imports {
writeln!(
f,
" import \"{}\".\"{}\": {}",
import.module, import.name, import.kind
)?;
}
for export in &self.module.exports {
writeln!(f, " export \"{}\": {}", export.name, export.kind)?;
}
for (func, func_decl) in self.module.funcs.entries() {
match func_decl {
FuncDecl::Body(sig, name, body) => {
writeln!(
f,
" {} \"{}\": {} = # {}",
func,
name,
sig,
sig_strs.get(&sig).unwrap()
)?;
let decorator = self
.decorators
.as_ref()
.map(|decorator_fn| decorator_fn(func));
writeln!(
f,
"{}",
body.display_with_decorator(" ", Some(self.module), decorator.as_ref())
)?;
}
FuncDecl::Lazy(sig, name, reader) => {
writeln!(
f,
" {} \"{}\": {} = # {}",
func,
name,
sig,
sig_strs.get(&sig).unwrap()
)?;
writeln!(f, " # raw bytes (length {})", reader.range().len())?;
}
FuncDecl::Compiled(sig, name, _) => {
writeln!(
f,
" {} \"{}\": {} = # {}",
func,
name,
sig,
sig_strs.get(&sig).unwrap()
)?;
writeln!(f, " # already compiled")?;
}
FuncDecl::Import(sig, name) => {
writeln!(
f,
" {} \"{}\": {} # {}",
func,
name,
sig,
sig_strs.get(&sig).unwrap()
)?;
}
FuncDecl::None => {
writeln!(f, " {}: none", func)?;
}
}
}
for (loc, loc_data) in self.module.debug.source_locs.entries() {
writeln!(
f,
" {} = {} line {} column {}",
loc, loc_data.file, loc_data.line, loc_data.col
)?;
}
for (file, file_name) in self.module.debug.source_files.entries() {
writeln!(f, " {} = \"{}\"", file, file_name)?;
}
writeln!(f, "}}")?;
Ok(())
}
}