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ab503044120 avatar ab503044120 commented on May 31, 2024

具体看第三章
image
如上图可以看到寄存器中有几个可保存局部变量的寄存器
image
局部变量满足以上几个条件才必须在栈内创建
这个代码才俩局部变量是可以不在栈上创建的
image

from computer-basics.

JessonYue avatar JessonYue commented on May 31, 2024

很好的思考。C语言中有个变量修饰符就做 register 变量名字。被这个修饰的变量有可能会放到存储器里面，一般CPU会有10多个寄存器，被修饰了会有选择的放入，因为满了就不会放了。所以局部变量会有2个地方。栈和寄存器，只是Java 不怎么偏向底层。所以大家忽略了。

from computer-basics.

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