13c7846815
Previously, Cranelift panicked (via a a panic in regalloc2) when the virtual-register limit of 2M (2^21) was reached. This resulted in a perplexing and unhelpful failure when the user provided a too-large input (such as the Wasm module in #4865). This PR adds an explicit check when allocating vregs that fails with a "code too large" error when the limit is hit, producing output such as (on the minimized testcase from #4865): ``` Error: failed to compile wasm function 3785 at offset 0xa3f3 Caused by: Compilation error: Code for function is too large ``` Fixes #4865.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.