Function regalloc::allocate_registers

pub fn allocate_registers<F: Function>(
    func: &mut F, 
    rreg_universe: &RealRegUniverse, 
    stackmap_info: Option<&StackmapRequestInfo>, 
    algorithm: AlgorithmWithDefaults
) -> Result<RegAllocResult<F>, RegAllocError>

Allocate registers for a function’s code, given a universe of real registers that we are allowed to use.

The control flow graph must not contain any critical edges, that is, any edge coming from a block with multiple successors must not flow into a block with multiple predecessors. The embedder must have split critical edges before handing over the function to this function. Otherwise, an error will be returned.

Allocate may succeed, returning a RegAllocResult with the new instruction sequence, or it may fail, returning an error.

This is a convenient function that uses standard options for the allocator, according to the selected algorithm.