Limit size of generated machine code to allow more efficient branching.

Most architectures have smaller and more efficient ways of branching to "near" locations than "far" locations.

In x86-64 a branch to a location within 2GB is smaller than to an arbitrary 64 bit location.
Likewise, in AArch64, a branch to within 1MB is a single instruction, but further branches will take more instructions.

We should limit the size of traces such that we can use more efficient branches in the generated machine code.

This will have little or no impact, as traces in release builds are unlikely to ever reach this limit, but we will to need enforce it for correctness, especially in debug builds.

Non sono indicati file o test. Inizia individuando la generazione delle trace e l’emissione dei branch specifica per l’architettura per x86-64 e AArch64, quindi determina dove può essere applicato un limite alla dimensione delle trace. Il lavoro è completato quando le trace generate rimangono entro l’intervallo di branch previsto, anche nelle build di debug, senza influire sul normale comportamento delle release.