#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*/ execv(char *, char *const *);
int main(void) {
  char *const cmdline[] = {"./execv_sub", "123", "abc", "xyz", NULL};
  execv("./execv_sub", cmdline);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
lea    -0x30(%rbp),%rdi
xor    %esi,%esi
mov    $0x28,%edx
call   1030 <memset@plt>
lea    0xeba(%rip),%rax
mov    %rax,-0x30(%rbp)
lea    0xebb(%rip),%rax
mov    %rax,-0x28(%rbp)
lea    0xeb4(%rip),%rax
mov    %rax,-0x20(%rbp)
lea    0xead(%rip),%rax
mov    %rax,-0x18(%rbp)
lea    -0x30(%rbp),%rsi
lea    0xe8a(%rip),%rdi
call   1040 <execv@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x28,%rsp
movq   $0x0,0x20(%rsp)
lea    0xedc(%rip),%rdi
mov    %rdi,(%rsp)
lea    0xedd(%rip),%rax
mov    %rax,0x8(%rsp)
lea    0xed5(%rip),%rax
mov    %rax,0x10(%rsp)
lea    0xecd(%rip),%rax
mov    %rax,0x18(%rsp)
mov    %rsp,%rsi
call   1030 <execv@plt>
xor    %eax,%eax
add    $0x28,%rsp
ret

LLVM IR (-O0):
@.str = [12 x i8] c"./execv_sub\00"
@.str.1 = [4 x i8] c"123\00"
@.str.2 = [4 x i8] c"abc\00"
@.str.3 = [4 x i8] c"xyz\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca [5 x i8*]
store i32 0, i32* %1
%3 = bitcast [5 x i8*]* %2 to i8*
%4 = bitcast i8* %3 to [5 x i8*]*
%5 = getelementptr inbounds [5 x i8*], [5 x i8*]* %4, i32 0, i32 0
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i32 0, i32 0), i8** %5
%6 = getelementptr inbounds [5 x i8*], [5 x i8*]* %4, i32 0, i32 1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i32 0, i32 0), i8** %6
%7 = getelementptr inbounds [5 x i8*], [5 x i8*]* %4, i32 0, i32 2
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i32 0, i32 0), i8** %7
%8 = getelementptr inbounds [5 x i8*], [5 x i8*]* %4, i32 0, i32 3
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i32 0, i32 0), i8** %8
%9 = getelementptr inbounds [5 x i8*], [5 x i8*]* %2, i64 0, i64 0
%10 = call i32 @execv(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8** %9)
ret i32 0
}

LLVM IR (-O2):
@.str = [12 x i8] c"./execv_sub\00"
@.str.1 = [4 x i8] c"123\00"
@.str.2 = [4 x i8] c"abc\00"
@.str.3 = [4 x i8] c"xyz\00"
define i32 @main() {
%1 = alloca [5 x i8*]
%2 = bitcast [5 x i8*]* %1 to i8*
%3 = getelementptr inbounds [5 x i8*], [5 x i8*]* %1, i64 0, i64 4
%4 = bitcast i8** %3 to i64*
store i64 0, i64* %4
%5 = getelementptr inbounds [5 x i8*], [5 x i8*]* %1, i64 0, i64 0
store i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8** %5
%6 = getelementptr inbounds [5 x i8*], [5 x i8*]* %1, i64 0, i64 1
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8** %6
%7 = getelementptr inbounds [5 x i8*], [5 x i8*]* %1, i64 0, i64 2
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.2, i64 0, i64 0), i8** %7
%8 = getelementptr inbounds [5 x i8*], [5 x i8*]* %1, i64 0, i64 3
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.3, i64 0, i64 0), i8** %8
%9 = call i32 @execv(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str, i64 0, i64 0), i8** %5)
ret i32 0
}