Function create_blocks

cranelift/codegen/src/inline.rs:1394–1425

Create inlined blocks in the caller for every block in the callee.

(
    allocs: &mut InliningAllocs,
    func: &mut ir::Function,
    callee: &ir::Function,
)

/// Create inlined blocks in the caller for every block in the callee.
fn create_blocks(
    allocs: &mut InliningAllocs,
    func: &mut ir::Function,
    callee: &ir::Function,
) -> u32 {
    let offset = func.dfg.blocks.len();
    let offset = u32::try_from(offset).unwrap();

    func.dfg.blocks.reserve(callee.dfg.blocks.len());
    for callee_block in callee.dfg.blocks.iter() {
        let caller_block = func.dfg.blocks.add();
        trace!("Callee {callee_block:?} = inlined {caller_block:?}");

        if callee.layout.is_cold(callee_block) {
            func.layout.set_cold(caller_block);
        }

        // Note: the entry block does not need parameters because the only
        // predecessor is the call block and we associate the callee's
        // parameters with the caller's arguments directly.
        if callee.layout.entry_block() != Some(callee_block) {
            for callee_param in callee.dfg.blocks[callee_block].params(&callee.dfg.value_lists) {
                let ty = callee.dfg.value_type(*callee_param);
                let caller_param = func.dfg.append_block_param(caller_block, ty);

                allocs.set_inlined_value(callee, *callee_param, caller_param);
            }
        }
    }

    offset
}

/// Copy and translate global values from the callee into the caller.
fn create_global_values(func: &mut ir::Function, callee: &ir::Function) -> CodegenResult<u32> {