#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, int);
int rand();
int /*<<< orphan*/ srand(int /*<<< orphan*/);
int /*<<< orphan*/ time(int /*<<< orphan*/ *);
int main() {
  int i;
  srand(time(NULL));
  for (i = 0; i < 20; i++)
    printf("i: %d rand(): %d\n", i, rand());
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
xor    %eax,%eax
mov    %eax,%edi
call   1050 <time@plt>
mov    %eax,%edi
call   1040 <srand@plt>
movl   $0x0,-0x8(%rbp)
cmpl   $0x14,-0x8(%rbp)
jge    119c <main+0x5c>
mov    -0x8(%rbp),%eax
mov    %eax,-0xc(%rbp)
mov    $0x0,%al
call   1060 <rand@plt>
mov    -0xc(%rbp),%esi
mov    %eax,%edx
lea    0xe77(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1166 <main+0x26>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xor    %edi,%edi
call   1050 <time@plt>
mov    %eax,%edi
call   1040 <srand@plt>
xor    %eax,%eax
call   1060 <rand@plt>
lea    0xea3(%rip),%rbx
mov    %rbx,%rdi
xor    %esi,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x1,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x2,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x4,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x5,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x6,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x7,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x8,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x9,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xa,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xb,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xc,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xd,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xe,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0xf,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x10,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x11,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x12,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
call   1060 <rand@plt>
mov    %rbx,%rdi
mov    $0x13,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [18 x i8] c"i: %d rand(): %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
%3 = call i32 @time(i32* null)
%4 = call i32 @srand(i32 %3)
store i32 0, i32* %2
br label %5
5: ; preds = %12, %0
%6 = load i32, i32* %2
%7 = icmp slt i32 %6, 20
br i1 %7, label %8, label %15
8: ; preds = %5
%9 = load i32, i32* %2
%10 = call i32 (...) @rand()
%11 = call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 %9, i32 %10)
br label %12
12: ; preds = %8
%13 = load i32, i32* %2
%14 = add nsw i32 %13, 1
store i32 %14, i32* %2
br label %5
15: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
@.str = [18 x i8] c"i: %d rand(): %d\0A\00"
define i32 @main() {
%1 = tail call i32 @time(i32* null)
%2 = tail call i32 @srand(i32 %1)
%3 = tail call i32 (...) @rand()
%4 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 0, i32 %3)
%5 = tail call i32 (...) @rand()
%6 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 1, i32 %5)
%7 = tail call i32 (...) @rand()
%8 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 2, i32 %7)
%9 = tail call i32 (...) @rand()
%10 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 3, i32 %9)
%11 = tail call i32 (...) @rand()
%12 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 4, i32 %11)
%13 = tail call i32 (...) @rand()
%14 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 5, i32 %13)
%15 = tail call i32 (...) @rand()
%16 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 6, i32 %15)
%17 = tail call i32 (...) @rand()
%18 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 7, i32 %17)
%19 = tail call i32 (...) @rand()
%20 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 8, i32 %19)
%21 = tail call i32 (...) @rand()
%22 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 9, i32 %21)
%23 = tail call i32 (...) @rand()
%24 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 10, i32 %23)
%25 = tail call i32 (...) @rand()
%26 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 11, i32 %25)
%27 = tail call i32 (...) @rand()
%28 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 12, i32 %27)
%29 = tail call i32 (...) @rand()
%30 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 13, i32 %29)
%31 = tail call i32 (...) @rand()
%32 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 14, i32 %31)
%33 = tail call i32 (...) @rand()
%34 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 15, i32 %33)
%35 = tail call i32 (...) @rand()
%36 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 16, i32 %35)
%37 = tail call i32 (...) @rand()
%38 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 17, i32 %37)
%39 = tail call i32 (...) @rand()
%40 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 18, i32 %39)
%41 = tail call i32 (...) @rand()
%42 = tail call i32 @printf(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str, i64 0, i64 0), i32 19, i32 %41)
ret i32 0
}