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char_test.s
  17 0008 C645FF05              movb    $5, -1(%rbp)
  18 000c 0FBE45FF              movsbl  -1(%rbp), %eax
  19 0010 89C6                  movl    %eax, %esi

int_test.s
  17 0008 C745FC05              movl    $5, -4(%rbp)
  17      000000
  18 000f 8B45FC                movl    -4(%rbp), %eax
  19 0012 89C6                  movl    %eax, %esi

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char_test.c
#include <stdio.h>

int char_test(void)
{
    char char_var = 5;

    printf("%d", char_var);
}

int_test.c
#include <stdio.h>

int int_test(void)
{
    int int_var = 5;

    printf("%d", int_var);
}

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char_test.s
movb        $5, -1(%rbp)  ¢« char_var = 5¤Î¤È¤³¤í
movsbl        -1(%rbp), %eax ¢«¡¡char_var¤ÎÃͤòeax¥ì¥¸¥¹¥¿¤Ë°Üư

int_test.s
movl        $5, -4(%rbp)¡¡¢«int_var = 5¤Î¤È¤³¤í
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