#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 /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int a, b, c;
  printf("Enter first number: ");
  scanf("%d", &a);
  printf("Enter second number: ");
  scanf("%d", &b);
  printf("Enter third number: ");
  scanf("%d", &c);
  if (a >= b && a >= c) {
    printf("%d is greatest. \n", a);
  } else if (b >= a && b >= c) {
    printf("%d is greatest. \n", b);
  } else {
    printf("%d is greatest. \n", c);
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed1(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xec4(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeb3(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1040 <scanf@plt>
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe95(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jl     11b7 <main+0x97>
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jl     11b7 <main+0x97>
mov    -0x8(%rbp),%esi
lea    0xe98(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11fb <main+0xdb>
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jl     11e5 <main+0xc5>
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jl     11e5 <main+0xc5>
mov    -0xc(%rbp),%esi
lea    0xe6a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11f6 <main+0xd6>
mov    -0x10(%rbp),%esi
lea    0xe54(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    11fb <main+0xdb>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0xedb(%rip),%rbx
lea    0xc(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xeca(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x8(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
lea    0x4(%rsp),%rsi
mov    %rbx,%rdi
call   1040 <scanf@plt>
mov    0x8(%rsp),%eax
mov    0x4(%rsp),%ecx
cmp    %ecx,%eax
mov    %eax,%edx
cmovl  %ecx,%edx
mov    0xc(%rsp),%edi
cmp    %edi,%eax
cmovl  %ecx,%edx
cmp    %ecx,%edi
mov    %edi,%esi
cmovl  %edx,%esi
cmp    %eax,%edi
cmovl  %edx,%esi
lea    0xe9b(%rip),%rdi
xor    %eax,%eax
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [21 x i8] c"Enter first number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [22 x i8] c"Enter second number: \00"
@.str.3 = [21 x i8] c"Enter third number: \00"
@.str.4 = [18 x i8] c"%d is greatest. \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 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %4)
%11 = load i32, i32* %2
%12 = load i32, i32* %3
%13 = icmp sge i32 %11, %12
br i1 %13, label %14, label %21
14: ; preds = %0
%15 = load i32, i32* %2
%16 = load i32, i32* %4
%17 = icmp sge i32 %15, %16
br i1 %17, label %18, label %21
18: ; preds = %14
%19 = load i32, i32* %2
%20 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %19)
br label %36
21: ; preds = %14, %0
%22 = load i32, i32* %3
%23 = load i32, i32* %2
%24 = icmp sge i32 %22, %23
br i1 %24, label %25, label %32
25: ; preds = %21
%26 = load i32, i32* %3
%27 = load i32, i32* %4
%28 = icmp sge i32 %26, %27
br i1 %28, label %29, label %32
29: ; preds = %25
%30 = load i32, i32* %3
%31 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %30)
br label %35
32: ; preds = %25, %21
%33 = load i32, i32* %4
%34 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %33)
br label %35
35: ; preds = %32, %29
br label %36
36: ; preds = %35, %18
ret i32 0
}

LLVM IR (-O2):
@.str = [21 x i8] c"Enter first number: \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [22 x i8] c"Enter second number: \00"
@.str.3 = [21 x i8] c"Enter third number: \00"
@.str.4 = [18 x i8] c"%d is greatest. \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 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%9 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([22 x i8], [22 x i8]* @.str.2, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @.str.3, i64 0, i64 0))
%12 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%13 = load i32, i32* %1
%14 = load i32, i32* %2
%15 = icmp slt i32 %13, %14
%16 = load i32, i32* %3
%17 = icmp slt i32 %13, %16
%18 = select i1 %15, i1 true, i1 %17
%19 = icmp slt i32 %14, %13
%20 = icmp slt i32 %14, %16
%21 = select i1 %19, i1 true, i1 %20
%22 = select i1 %21, i32 %16, i32 %14
%23 = select i1 %18, i32 %22, i32 %13
%24 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([18 x i8], [18 x i8]* @.str.4, i64 0, i64 0), i32 %23)
ret i32 0
}