#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*/ execvp(char *, char **);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ perror(char *);
int /*<<< orphan*/ putenv(char *);
int /*<<< orphan*/ stderr;
int main(int argc, char *argv[]) {
  if (argc < 2) {
    fprintf(stderr, "Usage: %s command [...]\n", argv[0]);
    return -1;
  }
  putenv("LD_PRELOAD="
         "/usr/local"
         "/lib/wsocks"
         "/libwsocks.so");
  execvp(argv[1], &argv[1]);
  perror("Execute error");
  return -1;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x2,-0x8(%rbp)
jge    1188 <main+0x48>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe89(%rip),%rsi
call   1040 <fprintf@plt>
movl   $0xffffffff,-0x4(%rbp)
jmp    11bc <main+0x7c>
lea    0xe8a(%rip),%rdi
call   1030 <putenv@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rsi
add    $0x8,%rsi
call   1060 <execvp@plt>
lea    0xe97(%rip),%rdi
call   1050 <perror@plt>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
mov    %rsi,%rbx
cmp    $0x1,%edi
jg     1168 <main+0x28>
mov    0x2e90(%rip),%rax
mov    (%rax),%edi
mov    (%rbx),%rdx
lea    0xea4(%rip),%rsi
call   1040 <fprintf@plt>
mov    $0xffffffff,%eax
pop    %rbx
ret
lea    0xeaa(%rip),%rdi
call   1030 <putenv@plt>
mov    0x8(%rbx),%rdi
add    $0x8,%rbx
mov    %rbx,%rsi
call   1060 <execvp@plt>
lea    0xebc(%rip),%rdi
call   1050 <perror@plt>
jmp    1161 <main+0x21>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [25 x i8] c"Usage: %s command [...]\0A\00"
@.str.1 = [46 x i8] c"LD_PRELOAD=/usr/local/lib/wsocks/libwsocks.so\00"
@.str.2 = [14 x i8] c"Execute error\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = load i32, i32* %4
%7 = icmp slt i32 %6, 2
br i1 %7, label %8, label %14
8: ; preds = %2
%9 = load i32, i32* @stderr
%10 = load i8**, i8*** %5
%11 = getelementptr inbounds i8*, i8** %10, i64 0
%12 = load i8*, i8** %11
%13 = call i32 @fprintf(i32 %9, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %12)
store i32 -1, i32* %3
br label %23
14: ; preds = %2
%15 = call i32 @putenv(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.1, i64 0, i64 0))
%16 = load i8**, i8*** %5
%17 = getelementptr inbounds i8*, i8** %16, i64 1
%18 = load i8*, i8** %17
%19 = load i8**, i8*** %5
%20 = getelementptr inbounds i8*, i8** %19, i64 1
%21 = call i32 @execvp(i8* %18, i8** %20)
%22 = call i32 @perror(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
store i32 -1, i32* %3
br label %23
23: ; preds = %14, %8
%24 = load i32, i32* %3
ret i32 %24
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [25 x i8] c"Usage: %s command [...]\0A\00"
@.str.1 = [46 x i8] c"LD_PRELOAD=/usr/local/lib/wsocks/libwsocks.so\00"
@.str.2 = [14 x i8] c"Execute error\00"
define i32 @main(i32 %0, i8** %1) {
%3 = icmp slt i32 %0, 2
br i1 %3, label %4, label %8
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([25 x i8], [25 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %14
8: ; preds = %2
%9 = tail call i32 @putenv(i8* getelementptr inbounds ([46 x i8], [46 x i8]* @.str.1, i64 0, i64 0))
%10 = getelementptr inbounds i8*, i8** %1, i64 1
%11 = load i8*, i8** %10
%12 = tail call i32 @execvp(i8* %11, i8** %10)
%13 = tail call i32 @perror(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.2, i64 0, i64 0))
br label %14
14: ; preds = %8, %4
ret i32 -1
}