#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 main() {
  int a = 2, b = 3;
  printf("IF-ELSE:\n");
  if (a > b) {
    printf("a is bigger than b\n");
  } else {
    printf("a is not bigger than b\n");
  }
  printf("\n");
  printf("SWITCH:\n");
  switch (a) {
  case 1:
    printf("a == 1\n");
    break;
  case 2:
    printf("a == 2\n");
    break;
  case 3:
    printf("a == 3\n");
    break;
  default:
    printf("a is nothing\n");
  }
  printf("\n");
  printf("FOR loop:\n");
  int i = 0;
  for (i = 0; i < 10; i++) {
    printf("%i\n", i);
  }
  printf("\n");
  printf("WHILE loop:\n");
  int j = 0;
  while (j < 10) {
    printf("%i\n", j);
    j++;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x2,-0x8(%rbp)
movl   $0x3,-0xc(%rbp)
lea    0xecc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
cmp    -0xc(%rbp),%eax
jle    115a <main+0x4a>
lea    0xebc(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1168 <main+0x58>
lea    0xebd(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed6(%rip),%rdi
xor    %eax,%eax
mov    %al,-0x19(%rbp)
call   1030 <printf@plt>
mov    -0x19(%rbp),%al
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
mov    %eax,-0x18(%rbp)
sub    $0x1,%eax
je     11be <main+0xae>
jmp    119c <main+0x8c>
mov    -0x18(%rbp),%eax
sub    $0x2,%eax
je     11d1 <main+0xc1>
jmp    11ad <main+0x9d>
mov    -0x18(%rbp),%eax
sub    $0x3,%eax
je     11e4 <main+0xd4>
jmp    11f7 <main+0xe7>
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1205 <main+0xf5>
lea    0xe6f(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1205 <main+0xf5>
lea    0xe64(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
jmp    1205 <main+0xf5>
lea    0xe59(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe39(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe4b(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x10(%rbp)
movl   $0x0,-0x10(%rbp)
cmpl   $0xa,-0x10(%rbp)
jge    1258 <main+0x148>
mov    -0x10(%rbp),%esi
lea    0xe2d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    122f <main+0x11f>
lea    0xde6(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe07(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
cmpl   $0xa,-0x14(%rbp)
jge    12a4 <main+0x194>
mov    -0x14(%rbp),%esi
lea    0xde1(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    127b <main+0x16b>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xecc(%rip),%rdi
call   1040 <puts@plt>
lea    0xec9(%rip),%rdi
call   1040 <puts@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xeca(%rip),%rdi
call   1040 <puts@plt>
lea    0xec6(%rip),%rdi
call   1040 <puts@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xeb7(%rip),%rdi
call   1040 <puts@plt>
lea    0xe78(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xe11(%rip),%rdi
call   1040 <puts@plt>
mov    %rbx,%rdi
xor    %esi,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [10 x i8] c"IF-ELSE:\0A\00"
@.str.1 = [20 x i8] c"a is bigger than b\0A\00"
@.str.2 = [24 x i8] c"a is not bigger than b\0A\00"
@.str.3 = [2 x i8] c"\0A\00"
@.str.4 = [9 x i8] c"SWITCH:\0A\00"
@.str.5 = [8 x i8] c"a == 1\0A\00"
@.str.6 = [8 x i8] c"a == 2\0A\00"
@.str.7 = [8 x i8] c"a == 3\0A\00"
@.str.8 = [14 x i8] c"a is nothing\0A\00"
@.str.9 = [11 x i8] c"FOR loop:\0A\00"
@.str.10 = [4 x i8] c"%i\0A\00"
@.str.11 = [13 x i8] c"WHILE loop:\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
store i32 2, i32* %2
store i32 3, i32* %3
%6 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str, i64 0, i64 0))
%7 = load i32, i32* %2
%8 = load i32, i32* %3
%9 = icmp sgt i32 %7, %8
br i1 %9, label %10, label %12
10: ; preds = %0
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str.1, i64 0, i64 0))
br label %14
12: ; preds = %0
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
br label %14
14: ; preds = %12, %10
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%16 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0))
%17 = load i32, i32* %2
switch i32 %17, label %24 [
i32 1, label %18
i32 2, label %20
i32 3, label %22
]
18: ; preds = %14
%19 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0))
br label %26
20: ; preds = %14
%21 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.6, i64 0, i64 0))
br label %26
22: ; preds = %14
%23 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.7, i64 0, i64 0))
br label %26
24: ; preds = %14
%25 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.8, i64 0, i64 0))
br label %26
26: ; preds = %24, %22, %20, %18
%27 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%28 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.9, i64 0, i64 0))
store i32 0, i32* %4
store i32 0, i32* %4
br label %29
29: ; preds = %35, %26
%30 = load i32, i32* %4
%31 = icmp slt i32 %30, 10
br i1 %31, label %32, label %38
32: ; preds = %29
%33 = load i32, i32* %4
%34 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 %33)
br label %35
35: ; preds = %32
%36 = load i32, i32* %4
%37 = add nsw i32 %36, 1
store i32 %37, i32* %4
br label %29
38: ; preds = %29
%39 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.3, i64 0, i64 0))
%40 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.11, i64 0, i64 0))
store i32 0, i32* %5
br label %41
41: ; preds = %44, %38
%42 = load i32, i32* %5
%43 = icmp slt i32 %42, 10
br i1 %43, label %44, label %49
44: ; preds = %41
%45 = load i32, i32* %5
%46 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 %45)
%47 = load i32, i32* %5
%48 = add nsw i32 %47, 1
store i32 %48, i32* %5
br label %41
49: ; preds = %41
ret i32 0
}

LLVM IR (-O2):
@.str.10 = [4 x i8] c"%i\0A\00"
@str = [9 x i8] c"IF-ELSE:\00"
@str.12 = [23 x i8] c"a is not bigger than b\00"
@str.13 = [8 x i8] c"SWITCH:\00"
@str.14 = [7 x i8] c"a == 2\00"
@str.15 = [10 x i8] c"FOR loop:\00"
@str.16 = [12 x i8] c"WHILE loop:\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([9 x i8], [9 x i8]* @str, i64 0, i64 0))
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str.12, i64 0, i64 0))
%3 = tail call i32 @putchar(i32 10)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([8 x i8], [8 x i8]* @str.13, i64 0, i64 0))
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @str.14, i64 0, i64 0))
%6 = tail call i32 @putchar(i32 10)
%7 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([10 x i8], [10 x i8]* @str.15, i64 0, i64 0))
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 0)
%9 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 1)
%10 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 2)
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 3)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 4)
%13 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 5)
%14 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 6)
%15 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 7)
%16 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 8)
%17 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 9)
%18 = tail call i32 @putchar(i32 10)
%19 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([12 x i8], [12 x i8]* @str.16, i64 0, i64 0))
%20 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 0)
%21 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 1)
%22 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 2)
%23 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 3)
%24 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 4)
%25 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 5)
%26 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 6)
%27 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 7)
%28 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 8)
%29 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([4 x i8], [4 x i8]* @.str.10, i64 0, i64 0), i32 9)
ret i32 0
}