#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */

/* Variables and functions */
int max3(int, int, int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ puts(char *);
int /*<<< orphan*/ scanf(char *, int *);
int main(void) {
  int na, nb, nc;
  puts("输入三个整数");
  printf("整数1： ");
  scanf("%d", &na);
  printf("整数2 ：");
  scanf("%d", &nb);
  printf("整数3 ：");
  scanf("%d", &nc);
  printf("最大的是  %d \n", max3(na, nb, nc));
  return (0);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeaa(%rip),%rdi
call   1030 <puts@plt>
lea    0xeb1(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeaf(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1060 <scanf@plt>
lea    0xea2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe91(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1060 <scanf@plt>
lea    0xe90(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xe73(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1060 <scanf@plt>
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
mov    -0x10(%rbp),%edx
call   1050 <max3@plt>
mov    %eax,%esi
lea    0xe6e(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xeb4(%rip),%rdi
call   1030 <puts@plt>
lea    0xebb(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xeb9(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0xea8(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
lea    0xe99(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0x4(%rsp),%rsi
mov    %rbx,%rdi
call   1060 <scanf@plt>
mov    0xc(%rsp),%edi
mov    0x8(%rsp),%esi
mov    0x4(%rsp),%edx
call   1050 <max3@plt>
lea    0xe79(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [19 x i8] c"\E8\BE\93\E5\85\A5\E4\B8\89\E4\B8\AA\E6\95\B4\E6\95\B0\00"
@.str.1 = [12 x i8] c"\E6\95\B4\E6\95\B01\EF\BC\9A \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [12 x i8] c"\E6\95\B4\E6\95\B02 \EF\BC\9A\00"
@.str.4 = [12 x i8] c"\E6\95\B4\E6\95\B03 \EF\BC\9A\00"
@.str.5 = [19 x i8] c"\E6\9C\80\E5\A4\A7\E7\9A\84\E6\98\AF %d \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 0, i32* %1
%5 = call i32 @puts(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.4, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %4)
%12 = load i32, i32* %2
%13 = load i32, i32* %3
%14 = load i32, i32* %4
%15 = call i32 @max3(i32 %12, i32 %13, i32 %14)
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i32 %15)
ret i32 0
}

LLVM IR (-O2):
@.str = [19 x i8] c"\E8\BE\93\E5\85\A5\E4\B8\89\E4\B8\AA\E6\95\B4\E6\95\B0\00"
@.str.1 = [12 x i8] c"\E6\95\B4\E6\95\B01\EF\BC\9A \00"
@.str.2 = [3 x i8] c"%d\00"
@.str.3 = [12 x i8] c"\E6\95\B4\E6\95\B02 \EF\BC\9A\00"
@.str.4 = [12 x i8] c"\E6\95\B4\E6\95\B03 \EF\BC\9A\00"
@.str.5 = [19 x i8] c"\E6\9C\80\E5\A4\A7\E7\9A\84\E6\98\AF %d \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = bitcast i32* %1 to i8*
%5 = bitcast i32* %2 to i8*
%6 = bitcast i32* %3 to i8*
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0))
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0))
%9 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%10 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.3, i64 0, i64 0))
%11 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%12 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @.str.4, i64 0, i64 0))
%13 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %3)
%14 = load i32, i32* %1
%15 = load i32, i32* %2
%16 = load i32, i32* %3
%17 = call i32 @max3(i32 %14, i32 %15, i32 %16)
%18 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.5, i64 0, i64 0), i32 %17)
ret i32 0
}