Teach `-dgc2stack` to promote GC allocations in simple loops to stack allocations too. (A "simple" loop is one where the allocation isn't used in a subsequent iteration) This also means it's no longer necessary to run this pass multiple times. Running it once after inlining should now catch all cases.

#ifndef __LDC_GEN_ABI_X86_64_H__
#define __LDC_GEN_ABI_X86_64_H__

#include "gen/abi.h"


TargetABI* getX86_64TargetABI();


#endif