#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 fn();
int /*<<< orphan*/ printf(char *, int);
int main(void) {
  for (int x = 10; x > 0; --x)
    printf("%d\n", fn());
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0xa,-0x8(%rbp)
cmpl   $0x0,-0x8(%rbp)
jle    1163 <main+0x43>
mov    $0x0,%al
call   1030 <fn@plt>
mov    %eax,%esi
lea    0xeb0(%rip),%rdi
call   1040 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x8(%rbp)
jmp    1136 <main+0x16>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xor    %eax,%eax
call   1030 <fn@plt>
lea    0xed1(%rip),%rbx
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
call   1030 <fn@plt>
mov    %rbx,%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

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

LLVM IR (-O2):
@.str = [4 x i8] c"%d\0A\00"
define i32 @main() {
%1 = tail call i32 (...) @fn()
%2 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %1)
%3 = tail call i32 (...) @fn()
%4 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %3)
%5 = tail call i32 (...) @fn()
%6 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %5)
%7 = tail call i32 (...) @fn()
%8 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %7)
%9 = tail call i32 (...) @fn()
%10 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %9)
%11 = tail call i32 (...) @fn()
%12 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %11)
%13 = tail call i32 (...) @fn()
%14 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %13)
%15 = tail call i32 (...) @fn()
%16 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %15)
%17 = tail call i32 (...) @fn()
%18 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %17)
%19 = tail call i32 (...) @fn()
%20 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %19)
ret i32 0
}