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|
use std::collections::BTreeMap;
use super::*;
pub(super) fn run<'a, 'input>(
resolver: &mut GlobalStringIdentResolver2<'input>,
directives: Vec<Directive2<'input, ast::Instruction<SpirvWord>, SpirvWord>>,
) -> Result<Vec<Directive2<'input, ast::Instruction<SpirvWord>, SpirvWord>>, TranslateError> {
directives
.into_iter()
.map(|directive| run_directive(resolver, directive))
.collect::<Result<Vec<_>, _>>()
}
fn run_directive<'input>(
resolver: &mut GlobalStringIdentResolver2,
directive: Directive2<'input, ast::Instruction<SpirvWord>, SpirvWord>,
) -> Result<Directive2<'input, ast::Instruction<SpirvWord>, SpirvWord>, TranslateError> {
Ok(match directive {
var @ Directive2::Variable(..) => var,
Directive2::Method(method) => Directive2::Method(run_method(resolver, method)?),
})
}
fn run_method<'input>(
resolver: &mut GlobalStringIdentResolver2,
mut method: Function2<'input, ast::Instruction<SpirvWord>, SpirvWord>,
) -> Result<Function2<'input, ast::Instruction<SpirvWord>, SpirvWord>, TranslateError> {
if method.func_decl.name.is_kernel() {
return Ok(method);
}
let is_declaration = method.body.is_none();
let mut body = Vec::new();
let mut remap_returns = Vec::new();
for arg in method.func_decl.return_arguments.iter_mut() {
match arg.state_space {
ptx_parser::StateSpace::Param => {
arg.state_space = ptx_parser::StateSpace::Reg;
let old_name = arg.name;
arg.name = resolver.register_unnamed(Some((arg.v_type.clone(), arg.state_space)));
if is_declaration {
continue;
}
remap_returns.push((old_name, arg.name, arg.v_type.clone()));
body.push(Statement::Variable(ast::Variable {
align: None,
name: old_name,
v_type: arg.v_type.clone(),
state_space: ptx_parser::StateSpace::Param,
array_init: Vec::new(),
}));
}
ptx_parser::StateSpace::Reg => {}
_ => return Err(error_unreachable()),
}
}
for arg in method.func_decl.input_arguments.iter_mut() {
match arg.state_space {
ptx_parser::StateSpace::Param => {
arg.state_space = ptx_parser::StateSpace::Reg;
let old_name = arg.name;
arg.name = resolver.register_unnamed(Some((arg.v_type.clone(), arg.state_space)));
if is_declaration {
continue;
}
body.push(Statement::Variable(ast::Variable {
align: None,
name: old_name,
v_type: arg.v_type.clone(),
state_space: ptx_parser::StateSpace::Param,
array_init: Vec::new(),
}));
body.push(Statement::Instruction(ast::Instruction::St {
data: ast::StData {
qualifier: ast::LdStQualifier::Weak,
state_space: ast::StateSpace::Param,
caching: ast::StCacheOperator::Writethrough,
typ: arg.v_type.clone(),
},
arguments: ast::StArgs {
src1: old_name,
src2: arg.name,
},
}));
}
ptx_parser::StateSpace::Reg => {}
_ => return Err(error_unreachable()),
}
}
if remap_returns.is_empty() {
return Ok(method);
}
let body = method
.body
.map(|statements| {
for statement in statements {
run_statement(&remap_returns, &mut body, statement)?;
}
Ok::<_, TranslateError>(body)
})
.transpose()?;
Ok(Function2 {
func_decl: method.func_decl,
globals: method.globals,
body,
import_as: method.import_as,
tuning: method.tuning,
linkage: method.linkage,
})
}
fn run_statement<'input>(
remap_returns: &Vec<(SpirvWord, SpirvWord, ast::Type)>,
result: &mut Vec<Statement<ast::Instruction<SpirvWord>, SpirvWord>>,
statement: Statement<ast::Instruction<SpirvWord>, SpirvWord>,
) -> Result<(), TranslateError> {
match statement {
Statement::Instruction(ast::Instruction::Ret { .. }) => {
for (old_name, new_name, type_) in remap_returns.iter().cloned() {
result.push(Statement::Instruction(ast::Instruction::Ld {
data: ast::LdDetails {
qualifier: ast::LdStQualifier::Weak,
state_space: ast::StateSpace::Reg,
caching: ast::LdCacheOperator::Cached,
typ: type_,
non_coherent: false,
},
arguments: ast::LdArgs {
dst: new_name,
src: old_name,
},
}));
}
result.push(statement);
}
statement => {
result.push(statement);
}
}
Ok(())
}
|
