#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*/ errno;
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ printf(char *, int, char *);
int rename(char *, char *);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int main(int argc, char *argv[]) {
  int rc;
  if (argc != 3) {
    fprintf(stderr, "usage: %s from to\n", argv[0]);
    exit(1);
  }
  rc = rename(argv[1], argv[2]);
  printf("rename returned %d: %s\n", rc, strerror(errno));
  return rc;
}


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)
cmpl   $0x3,-0x8(%rbp)
je     1196 <main+0x46>
mov    0x2e69(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe79(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1050 <rename@plt>
mov    %eax,-0x14(%rbp)
mov    -0x14(%rbp),%eax
mov    %eax,-0x18(%rbp)
mov    0x2e1d(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
mov    -0x18(%rbp),%esi
mov    %rax,%rdx
lea    0xe44(%rip),%rdi
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
cmp    $0x3,%edi
jne    1188 <main+0x38>
mov    0x8(%rsi),%rdi
mov    0x10(%rsi),%rsi
call   1050 <rename@plt>
mov    %eax,%ebx
mov    0x2e6c(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
lea    0xe99(%rip),%rdi
mov    %ebx,%esi
mov    %rax,%rdx
call   1030 <printf@plt>
mov    %ebx,%eax
pop    %rbx
ret
mov    0x2e51(%rip),%rax
mov    (%rax),%edi
mov    (%rsi),%rdx
lea    0xe65(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0x1,%edi
call   1060 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [19 x i8] c"usage: %s from to\0A\00"
@.str.1 = [24 x i8] c"rename returned %d: %s\0A\00"
@errno = global i32 0
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
%7 = load i32, i32* %4
%8 = icmp ne i32 %7, 3
br i1 %8, label %9, label %16
9: ; preds = %2
%10 = load i32, i32* @stderr
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 0
%13 = load i8*, i8** %12
%14 = call i32 @fprintf(i32 %10, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %13)
%15 = call i32 @exit(i32 1)
unreachable
16: ; preds = %2
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 1
%19 = load i8*, i8** %18
%20 = load i8**, i8*** %5
%21 = getelementptr inbounds i8*, i8** %20, i64 2
%22 = load i8*, i8** %21
%23 = call i32 @rename(i8* %19, i8* %22)
store i32 %23, i32* %6
%24 = load i32, i32* %6
%25 = load i32, i32* @errno
%26 = call i8* @strerror(i32 %25)
%27 = call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i32 %24, i8* %26)
%28 = load i32, i32* %6
ret i32 %28
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [19 x i8] c"usage: %s from to\0A\00"
@.str.1 = [24 x i8] c"rename returned %d: %s\0A\00"
@errno = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %9, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i8* %6)
%8 = tail call i32 @exit(i32 1)
unreachable
9: ; preds = %2
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = getelementptr inbounds i8*, i8** %1, i64 2
%13 = load i8*, i8** %12
%14 = tail call i32 @rename(i8* %11, i8* %13)
%15 = load i32, i32* @errno
%16 = tail call i8* @strerror(i32 %15)
%17 = tail call i32 @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i32 %14, i8* %16)
ret i32 %14
}