Struct FrameMaterializeInfo 

#[repr(C)]
pub struct FrameMaterializeInfo {
    pub base_offset: u32,
    pub pc: u32,
    pub nresults: i32,
}

P12-S4-step4b — one Lua frame to push when a depth>0 side-exit fires. Constructed at trace compile time from the recorded Op::Call chain’s A field (caller’s R[A] = function slot) and the inlined callee’s c field (nresults). pc is the address the helper writes onto the freshly-pushed frame so the interp resumes at the right offset inside the callee body.

repr(C) because the trace’s IR loads the array via raw pointer arithmetic; Rust’s default repr doesn’t guarantee field order. All-Copy fields with no padding inside each field — 12 bytes per entry on amd64.

Fields

base_offset: u32

Stack offset (relative to the trace head’s frame.base) of the callee’s first register slot. The new frame’s base is head_frame.base + base_offset; its func_slot is one below.

pc: u32

PC to write on the freshly-pushed frame. For inner frames (not the innermost) this is the caller’s Call.pc + 1 so the interp resumes after the Call instruction. For the innermost frame (the one the side-exit fires inside) the dispatcher overrides this with the actual side-exit PC — keeps the helper PC-agnostic per the RFC’s “helper doesn’t know which frame is innermost” rule.

nresults: i32

PUC nresults: how many return values the caller expects from this call (encoded as Op::Call’s C - 1). step4b-C’s pre-emit pass bails if any inlined Call has nresults != 1 (Op::Return1 copy-back assumes one value).

Trait Implementations

impl Clone for FrameMaterializeInfo

fn clone(&self) -> FrameMaterializeInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FrameMaterializeInfo

impl Debug for FrameMaterializeInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.