e8d3b8e3ea
This commit fixes an issue in Cranelift where legalization of `heap_addr` instructions (used by wasm to represent heap accesses) could be off-by-two where loads that should be valid were actually treated as invalid. The bug here happened in an optimization where tests against odd constants were being altered to tests against even constants by subtracting one from the limit instead of adding one to the limit. The comment around this area has been updated in accordance with a little more math-stuff as well to help future readers.
This crate contains the core Cranelift code generator. It translates code from an intermediate representation into executable machine code.