alloc_instruction
struct instruction *insn = alloc_instruction(OP_SYMADDR, bits_in_pointer);
insn = alloc_instruction(OP_CONTEXT, 0);
struct instruction *insn = alloc_instruction(OP_INLINED_CALL, 0);
struct instruction *insn = alloc_instruction(OP_CONTEXT, 0);
struct instruction *insn = alloc_instruction(OP_RANGE, 0);
insn = alloc_instruction(OP_ASM, 0);
goto_ins = alloc_instruction(OP_COMPUTEDGOTO, 0);
entry = alloc_instruction(OP_ENTRY, 0);
struct instruction *insn = alloc_instruction(opcode, type_size(type));
struct instruction *br = alloc_instruction(OP_BR, 0);
br = alloc_instruction(OP_BR, 0);
br = alloc_instruction(OP_CBR, 0);