57 lines
1.6 KiB
Rust
57 lines
1.6 KiB
Rust
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//! SSA validation.
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use crate::cfg::CFGInfo;
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use crate::entity::*;
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use crate::ir::*;
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struct DefBlocks {
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def_block: PerEntity<Value, Block>,
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}
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impl DefBlocks {
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fn compute(body: &FunctionBody) -> Self {
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let mut def_block = PerEntity::default();
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for (block, data) in body.blocks.entries() {
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for &(_, param) in &data.params {
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def_block[param] = block;
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}
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for &inst in &data.insts {
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def_block[inst] = block;
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}
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}
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DefBlocks { def_block }
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}
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}
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pub fn run(body: &FunctionBody, cfg: &CFGInfo) {
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let def_blocks = DefBlocks::compute(body);
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for (block, data) in body.blocks.entries() {
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let validate = |value| {
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let value = body.resolve_alias(value);
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let def_block = def_blocks.def_block[value];
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assert!(cfg.dominates(def_block, block));
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};
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for &inst in &data.insts {
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match &body.values[inst] {
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&ValueDef::Operator(_, ref args, _) => {
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for &arg in args {
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validate(arg);
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}
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}
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&ValueDef::PickOutput(val, _, _) => {
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validate(val);
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}
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&ValueDef::Trace(_, ref args) => {
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for &arg in args {
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validate(arg);
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}
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}
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&ValueDef::Alias(..) => {}
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&ValueDef::None | &ValueDef::Placeholder(_) | &ValueDef::BlockParam(..) => {}
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}
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}
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data.terminator.visit_uses(|u| validate(u));
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}
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}
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