Struct EmitterConfig 

pub struct EmitterConfig {
    pub wasm_memory_base: i32,
    pub param_overflow_base: i32,
    pub register_cache_enabled: bool,
    pub constant_propagation_enabled: bool,
    pub icmp_fusion_enabled: bool,
    pub shrink_wrap_enabled: bool,
    pub cross_block_cache_enabled: bool,
    pub register_allocation_enabled: bool,
    pub fallthrough_jumps_enabled: bool,
    pub lazy_spill_enabled: bool,
}

Per-function configuration for the PVM emitter.

These fields are set once when lowering begins and are never mutated during codegen. Separating them from mutable state makes it clear what’s fixed vs what changes.

Fields

wasm_memory_base: i32

WASM memory base address (for converting WASM addresses to PVM addresses).

param_overflow_base: i32

Base address for the parameter overflow area (5th+ args for call_indirect).

register_cache_enabled: bool

Whether the register cache (store-load forwarding) is enabled.

constant_propagation_enabled: bool

Whether constant propagation (redundant LoadImm elimination) is enabled.

icmp_fusion_enabled: bool

Whether ICmp+Branch fusion is enabled.

shrink_wrap_enabled: bool

Whether callee-save shrink wrapping is enabled.

cross_block_cache_enabled: bool

Whether cross-block register cache propagation is enabled.

register_allocation_enabled: bool

Whether register allocation (long-lived values in allocatable regs) is enabled.

fallthrough_jumps_enabled: bool

Whether fallthrough jump elimination is enabled.

lazy_spill_enabled: bool

Whether lazy spill is enabled (skip stack stores for register-allocated values).