#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*/ EXIT_FAILURE;
int /*<<< orphan*/ execve(char *, char **, char **);
int /*<<< orphan*/ exit(int /*<<< orphan*/);
int /*<<< orphan*/ perror(char *);
int main(int argc, char *argv[]) {
  char *exec_argv[] = {"ls", "-l", "./", NULL};
  char *exec_envp[] = {NULL};
  execve("/bin/ls", exec_argv, exec_envp);
  perror("execve");
  exit(EXIT_FAILURE);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    0x2c93(%rip),%rax
mov    %rax,-0x30(%rbp)
mov    0x2c90(%rip),%rax
mov    %rax,-0x28(%rbp)
mov    0x2c8d(%rip),%rax
mov    %rax,-0x20(%rbp)
mov    0x2c8a(%rip),%rax
mov    %rax,-0x18(%rbp)
lea    -0x38(%rbp),%rdi
xor    %esi,%esi
mov    $0x8,%edx
call   1030 <memset@plt>
lea    -0x30(%rbp),%rsi
lea    -0x38(%rbp),%rdx
lea    0xe65(%rip),%rdi
call   1040 <execve@plt>
lea    0xe61(%rip),%rdi
call   1050 <perror@plt>
mov    0x2e1f(%rip),%rax
mov    (%rax),%edi
call   1060 <exit@plt>

x86 assembly (clang, -O2):
<main>:
sub    $0x38,%rsp
movaps 0x2cc5(%rip),%xmm0
movaps %xmm0,0x20(%rsp)
movaps 0x2ca9(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movq   $0x0,0x8(%rsp)
lea    0xeaa(%rip),%rdi
lea    0x10(%rsp),%rsi
lea    0x8(%rsp),%rdx
call   1030 <execve@plt>
lea    0xe9c(%rip),%rdi
call   1040 <perror@plt>
mov    0x2e5a(%rip),%rax
mov    (%rax),%edi
call   1050 <exit@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"ls\00"
@.str.1 = [3 x i8] c"-l\00"
@.str.2 = [3 x i8] c"./\00"
@__const.main.exec_argv = [4 x i8*] [i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i32 0, i32 0), i8* null]
@.str.3 = [8 x i8] c"/bin/ls\00"
@.str.4 = [7 x i8] c"execve\00"
@EXIT_FAILURE = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [4 x i8*]
%7 = alloca [1 x i8*]
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = bitcast [4 x i8*]* %6 to i8*
%9 = bitcast [1 x i8*]* %7 to i8*
%10 = getelementptr inbounds [4 x i8*], [4 x i8*]* %6, i64 0, i64 0
%11 = getelementptr inbounds [1 x i8*], [1 x i8*]* %7, i64 0, i64 0
%12 = call i32 @execve(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8** %10, i8** %11)
%13 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
%14 = load i32, i32* @EXIT_FAILURE
%15 = call i32 @exit(i32 %14)
unreachable
}

LLVM IR (-O2):
@.str = [3 x i8] c"ls\00"
@.str.1 = [3 x i8] c"-l\00"
@.str.2 = [3 x i8] c"./\00"
@__const.main.exec_argv = [4 x i8*] [i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i32 0, i32 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i32 0, i32 0), i8* null]
@.str.3 = [8 x i8] c"/bin/ls\00"
@.str.4 = [7 x i8] c"execve\00"
@EXIT_FAILURE = global i32 0
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca [4 x i8*]
%4 = alloca [1 x i8*]
%5 = bitcast [4 x i8*]* %3 to i8*
%6 = bitcast [1 x i8*]* %4 to i8*
%7 = bitcast [1 x i8*]* %4 to i64*
store i64 0, i64* %7
%8 = getelementptr inbounds [4 x i8*], [4 x i8*]* %3, i64 0, i64 0
%9 = getelementptr inbounds [1 x i8*], [1 x i8*]* %4, i64 0, i64 0
%10 = call i32 @execve(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0), i8** %8, i8** %9)
%11 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
%12 = load i32, i32* @EXIT_FAILURE
%13 = call i32 @exit(i32 %12)
unreachable
}