cranelift/isle/veri: handle negative constants

avanhatt / wasmtime

Standalone JIT-style runtime for WebAssembly, using Cranelift

https://wasmtime.dev/

Apache License 2.0

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Closed mmcloughlin closed 11 months ago

mmcloughlin commented 11 months ago

Currently the solver outputs for example bv-1 for negative constant values, which is invalid SMT and causes an error.

This PR updates the bv method in the solver to produce bvneg of the positive constant in this case.