#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 atoi(char *);
int fibs(int);
int /*<<< orphan*/ printf(char *, int, int);
int main(int argc, char **argv) {
  while (--argc) {
    int arg = atoi(*++argv);
    printf("nfibs(%d) = %d\n", arg, fibs(arg));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,-0x8(%rbp)
cmp    $0x0,%eax
je     1197 <main+0x67>
mov    -0x10(%rbp),%rax
mov    %rax,%rcx
add    $0x8,%rcx
mov    %rcx,-0x10(%rbp)
mov    0x8(%rax),%rdi
call   1050 <atoi@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    -0x14(%rbp),%edi
call   1040 <fibs@plt>
mov    -0x18(%rbp),%esi
mov    %eax,%edx
lea    0xe73(%rip),%rdi
call   1030 <printf@plt>
jmp    1146 <main+0x16>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
cmp    $0x1,%edi
je     1177 <main+0x47>
mov    %rsi,%r15
mov    %edi,%r12d
mov    $0x1,%ebx
lea    0xeb1(%rip),%r14
nop
mov    (%r15,%rbx,8),%rdi
call   1050 <atoi@plt>
mov    %eax,%ebp
mov    %eax,%edi
call   1040 <fibs@plt>
mov    %r14,%rdi
mov    %ebp,%esi
mov    %eax,%edx
call   1030 <printf@plt>
add    $0x1,%rbx
cmp    %ebx,%r12d
jne    1150 <main+0x20>
xor    %eax,%eax
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
@.str = [16 x i8] c"nfibs(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
br label %7
7: ; preds = %11, %2
%8 = load i32, i32* %4
%9 = add nsw i32 %8, -1
store i32 %9, i32* %4
%10 = icmp ne i32 %9, 0
br i1 %10, label %11, label %20
11: ; preds = %7
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i32 1
store i8** %13, i8*** %5
%14 = load i8*, i8** %13
%15 = call i32 @atoi(i8* %14)
store i32 %15, i32* %6
%16 = load i32, i32* %6
%17 = load i32, i32* %6
%18 = call i32 @fibs(i32 %17)
%19 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i32 %16, i32 %18)
br label %7
20: ; preds = %7
ret i32 0
}

LLVM IR (-O2):
@.str = [16 x i8] c"nfibs(%d) = %d\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = add nsw i32 %0, -1
%4 = icmp eq i32 %3, 0
br i1 %4, label %15, label %5
5: ; preds = %2, %5
%6 = phi i32 [ %13, %5 ], [ %3, %2 ]
%7 = phi i8** [ %8, %5 ], [ %1, %2 ]
%8 = getelementptr inbounds i8*, i8** %7, i64 1
%9 = load i8*, i8** %8
%10 = tail call i32 @atoi(i8* %9)
%11 = tail call i32 @fibs(i32 %10)
%12 = tail call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i32 %10, i32 %11)
%13 = add nsw i32 %6, -1
%14 = icmp eq i32 %13, 0
br i1 %14, label %15, label %5
15: ; preds = %5, %2
ret i32 0
}