Method add_clone_id_rules

crates/rustc_codegen_spirv/src/linker/inline.rs:779–789

(&mut self, rewrite_rules: &mut FxHashMap<Word, Word>, blocks: &[Block])

    }

    fn add_clone_id_rules(&mut self, rewrite_rules: &mut FxHashMap<Word, Word>, blocks: &[Block]) {
        for block in blocks {
            for inst in block.label.iter().chain(&block.instructions) {
                if let Some(result_id) = inst.result_id {
                    let new_id = self.id();
                    let old = rewrite_rules.insert(result_id, new_id);
                    assert!(old.is_none());
                }
            }
        }
    }

    // HACK(eddyb) the second and third return values are additional debuginfo
    // instructions that need to be inserted just before/after the callsite.