#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 *, int *, int *);
int main() {
  int a, b, c, d;
  printf("Please enter 4 numbers separated by spaces > ");
  scanf("%d %d %d %d", &a, &b, &c, &d);
  if (a < b && a < c && a < d)
    printf("%d is the smallest\n", a);
  else if (b < a && b < c && b < d)
    printf("%d is the smallest\n", b);
  else if (c < a && c < b && c < d)
    printf("%d is the smallest\n", c);
  else if (d < a && d < c && d < b)
    printf("%d is the smallest\n", d);
  else
    printf("I don't know what I'm doing. \n");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xeea(%rip),%rdi
lea    -0x8(%rbp),%rsi
lea    -0xc(%rbp),%rdx
lea    -0x10(%rbp),%rcx
lea    -0x14(%rbp),%r8
call   1040 <scanf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1193 <main+0x73>
mov    -0x8(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    1193 <main+0x73>
mov    -0x8(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    1193 <main+0x73>
mov    -0x8(%rbp),%esi
lea    0xeb3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    125e <main+0x13e>
mov    -0xc(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11cd <main+0xad>
mov    -0xc(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    11cd <main+0xad>
mov    -0xc(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    11cd <main+0xad>
mov    -0xc(%rbp),%esi
lea    0xe79(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1259 <main+0x139>
mov    -0x10(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1207 <main+0xe7>
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1207 <main+0xe7>
mov    -0x10(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    1207 <main+0xe7>
mov    -0x10(%rbp),%esi
lea    0xe3f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1254 <main+0x134>
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    1241 <main+0x121>
mov    -0x14(%rbp),%eax
cmp    -0x10(%rbp),%eax
jge    1241 <main+0x121>
mov    -0x14(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1241 <main+0x121>
mov    -0x14(%rbp),%esi
lea    0xe05(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    124f <main+0x12f>
lea    0xe06(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1254 <main+0x134>
jmp    1259 <main+0x139>
jmp    125e <main+0x13e>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xec5(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
lea    0xee5(%rip),%rdi
lea    0x14(%rsp),%rsi
lea    0x10(%rsp),%rdx
lea    0xc(%rsp),%rcx
lea    0x8(%rsp),%r8
call   1050 <scanf@plt>
mov    0x14(%rsp),%edx
mov    0x10(%rsp),%esi
mov    0xc(%rsp),%ecx
mov    0x8(%rsp),%eax
cmp    %esi,%edx
jge    1189 <main+0x59>
cmp    %ecx,%edx
jge    1189 <main+0x59>
cmp    %eax,%edx
jge    1189 <main+0x59>
lea    0xeb5(%rip),%rdi
mov    %edx,%esi
jmp    11ca <main+0x9a>
cmp    %edx,%esi
jge    119e <main+0x6e>
cmp    %ecx,%esi
jge    119e <main+0x6e>
cmp    %eax,%esi
jge    119e <main+0x6e>
lea    0xe9e(%rip),%rdi
jmp    11ca <main+0x9a>
cmp    %edx,%ecx
jge    11b5 <main+0x85>
cmp    %esi,%ecx
jge    11b5 <main+0x85>
cmp    %eax,%ecx
jge    11b5 <main+0x85>
lea    0xe89(%rip),%rdi
mov    %ecx,%esi
jmp    11ca <main+0x9a>
cmp    %edx,%eax
jge    11d8 <main+0xa8>
cmp    %ecx,%eax
jge    11d8 <main+0xa8>
cmp    %esi,%eax
jge    11d8 <main+0xa8>
lea    0xe72(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x18,%rsp
ret
lea    0xe6f(%rip),%rdi
call   1030 <puts@plt>
jmp    11d1 <main+0xa1>

LLVM IR (-O0):
@.str = [46 x i8] c"Please enter 4 numbers separated by spaces > \00"
@.str.1 = [12 x i8] c"%d %d %d %d\00"
@.str.2 = [20 x i8] c"%d is the smallest\0A\00"
@.str.3 = [31 x i8] c"I don't know what I'm doing. \0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
store i32 0, i32* %1
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str, i64 0, i64 0))
%7 = call i32 @scanf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32* %2, i32* %3, i32* %4, i32* %5)
%8 = load i32, i32* %2
%9 = load i32, i32* %3
%10 = icmp slt i32 %8, %9
br i1 %10, label %11, label %22
11: ; preds = %0
%12 = load i32, i32* %2
%13 = load i32, i32* %4
%14 = icmp slt i32 %12, %13
br i1 %14, label %15, label %22
15: ; preds = %11
%16 = load i32, i32* %2
%17 = load i32, i32* %5
%18 = icmp slt i32 %16, %17
br i1 %18, label %19, label %22
19: ; preds = %15
%20 = load i32, i32* %2
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %20)
br label %72
22: ; preds = %15, %11, %0
%23 = load i32, i32* %3
%24 = load i32, i32* %2
%25 = icmp slt i32 %23, %24
br i1 %25, label %26, label %37
26: ; preds = %22
%27 = load i32, i32* %3
%28 = load i32, i32* %4
%29 = icmp slt i32 %27, %28
br i1 %29, label %30, label %37
30: ; preds = %26
%31 = load i32, i32* %3
%32 = load i32, i32* %5
%33 = icmp slt i32 %31, %32
br i1 %33, label %34, label %37
34: ; preds = %30
%35 = load i32, i32* %3
%36 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %35)
br label %71
37: ; preds = %30, %26, %22
%38 = load i32, i32* %4
%39 = load i32, i32* %2
%40 = icmp slt i32 %38, %39
br i1 %40, label %41, label %52
41: ; preds = %37
%42 = load i32, i32* %4
%43 = load i32, i32* %3
%44 = icmp slt i32 %42, %43
br i1 %44, label %45, label %52
45: ; preds = %41
%46 = load i32, i32* %4
%47 = load i32, i32* %5
%48 = icmp slt i32 %46, %47
br i1 %48, label %49, label %52
49: ; preds = %45
%50 = load i32, i32* %4
%51 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %50)
br label %70
52: ; preds = %45, %41, %37
%53 = load i32, i32* %5
%54 = load i32, i32* %2
%55 = icmp slt i32 %53, %54
br i1 %55, label %56, label %67
56: ; preds = %52
%57 = load i32, i32* %5
%58 = load i32, i32* %4
%59 = icmp slt i32 %57, %58
br i1 %59, label %60, label %67
60: ; preds = %56
%61 = load i32, i32* %5
%62 = load i32, i32* %3
%63 = icmp slt i32 %61, %62
br i1 %63, label %64, label %67
64: ; preds = %60
%65 = load i32, i32* %5
%66 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %65)
br label %69
67: ; preds = %60, %56, %52
%68 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.3, i64 0, i64 0))
br label %69
69: ; preds = %67, %64
br label %70
70: ; preds = %69, %49
br label %71
71: ; preds = %70, %34
br label %72
72: ; preds = %71, %19
ret i32 0
}

LLVM IR (-O2):
@.str = [46 x i8] c"Please enter 4 numbers separated by spaces > \00"
@.str.1 = [12 x i8] c"%d %d %d %d\00"
@.str.2 = [20 x i8] c"%d is the smallest\0A\00"
@str = [30 x i8] c"I don't know what I'm doing. \00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
%5 = bitcast i32* %1 to i8*
%6 = bitcast i32* %2 to i8*
%7 = bitcast i32* %3 to i8*
%8 = bitcast i32* %4 to i8*
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([46 x i8], [46 x i8]* @.str, i64 0, i64 0))
%10 = call i32 @scanf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32* %1, i32* %2, i32* %3, i32* %4)
%11 = load i32, i32* %1
%12 = load i32, i32* %2
%13 = icmp slt i32 %11, %12
%14 = load i32, i32* %3
%15 = icmp slt i32 %11, %14
%16 = select i1 %13, i1 %15, i1 false
%17 = load i32, i32* %4
%18 = icmp slt i32 %11, %17
%19 = select i1 %16, i1 %18, i1 false
br i1 %19, label %20, label %22
20: ; preds = %0
%21 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %11)
br label %48
22: ; preds = %0
%23 = icmp slt i32 %12, %11
%24 = icmp slt i32 %12, %14
%25 = select i1 %23, i1 %24, i1 false
%26 = icmp slt i32 %12, %17
%27 = select i1 %25, i1 %26, i1 false
br i1 %27, label %28, label %30
28: ; preds = %22
%29 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %12)
br label %48
30: ; preds = %22
%31 = icmp slt i32 %14, %11
%32 = icmp slt i32 %14, %12
%33 = select i1 %31, i1 %32, i1 false
%34 = icmp slt i32 %14, %17
%35 = select i1 %33, i1 %34, i1 false
br i1 %35, label %36, label %38
36: ; preds = %30
%37 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %14)
br label %48
38: ; preds = %30
%39 = icmp slt i32 %17, %11
%40 = icmp slt i32 %17, %14
%41 = select i1 %39, i1 %40, i1 false
%42 = icmp slt i32 %17, %12
%43 = select i1 %41, i1 %42, i1 false
br i1 %43, label %44, label %46
44: ; preds = %38
%45 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([20 x i8], [20 x i8]* @.str.2, i64 0, i64 0), i32 %17)
br label %48
46: ; preds = %38
%47 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str, i64 0, i64 0))
br label %48
48: ; preds = %28, %44, %46, %36, %20
ret i32 0
}