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DedupKey

revmc_codegen::bytecode::passes::dedup

Struct DedupKey 

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struct DedupKey {
    fingerprint: SmallVec<[u8; 32]>,
    succs: SmallVec<[Block; 4]>,
    is_multi_jump: bool,
}
Expand description

Dedup key: instruction-level structural fingerprint, CFG successor blocks, and terminator jump kind.

The fingerprint encodes each instruction’s opcode plus its (interned) immediate so that PUSH operations with the same value, and DUPN/SWAPN/EXCHANGE with the same operand, hash equal across blocks. Raw bytes are intentionally not consulted — all immediate data is pre-interned at parse time on InstData.

Structural equality alone is insufficient for JUMP-terminated blocks because block analysis may resolve identical copies to different static targets depending on incoming stack context (e.g. different return-address values), so successors are part of the key.

The is_multi_jump discriminator prevents MULTI_JUMP dispatcher blocks from colliding with STATIC_JUMP blocks that happen to share the same fingerprint and successor set.

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§fingerprint: SmallVec<[u8; 32]>

Instruction fingerprint: per-instruction (opcode, immediate) tuples encoded as bytes.

§succs: SmallVec<[Block; 4]>

CFG successors for this block. Two structurally identical blocks are only merged when their successor sets also match.

§is_multi_jump: bool

Whether the block’s terminator is a MULTI_JUMP.

Trait Implementations§

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impl Clone for DedupKey

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fn clone(&self) -> DedupKey

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Hash for DedupKey

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for DedupKey

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fn eq(&self, other: &DedupKey) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for DedupKey

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impl StructuralPartialEq for DedupKey

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Size: 72 bytes