#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*/ execv(char *, char **);
int /*<<< orphan*/ exit(int);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, char *, ...);
int /*<<< orphan*/ stderr;
char *strerror(int /*<<< orphan*/);
int main(int argc, char **argv) {
  char *path;
  if (argc < 3) {
    fprintf(stderr, "usage: %s path arg0 [ arg ... ]\n", argv[0]);
    exit(1);
  }
  path = argv[1];
  execv(path, argv + 2);
  fprintf(stderr, "%s: execv() failed: %s\n", argv[0], strerror(errno));
  exit(1);
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
jge    1188 <main+0x48>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe89(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
mov    %rax,-0x18(%rbp)
mov    -0x18(%rbp),%rdi
mov    -0x10(%rbp),%rsi
add    $0x10,%rsi
call   1060 <execv@plt>
mov    0x2e34(%rip),%rax
mov    (%rax),%eax
mov    %eax,-0x24(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%rax
mov    %rax,-0x20(%rbp)
mov    0x2e15(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
mov    -0x24(%rbp),%edi
mov    -0x20(%rbp),%rdx
mov    %rax,%rcx
lea    0xe46(%rip),%rsi
mov    $0x0,%al
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    %rsi,%rbx
cmp    $0x2,%edi
jg     116f <main+0x2f>
mov    0x2e8e(%rip),%rax
mov    (%rax),%edi
mov    (%rbx),%rdx
lea    0xea2(%rip),%rsi
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>
mov    0x8(%rbx),%rdi
lea    0x10(%rbx),%rsi
call   1060 <execv@plt>
mov    0x2e5d(%rip),%rax
mov    (%rax),%ebp
mov    (%rbx),%rbx
mov    0x2e49(%rip),%rax
mov    (%rax),%edi
call   1050 <strerror@plt>
lea    0xe84(%rip),%rsi
mov    %ebp,%edi
mov    %rbx,%rdx
mov    %rax,%rcx
xor    %eax,%eax
call   1030 <fprintf@plt>
mov    $0x1,%edi
call   1040 <exit@plt>

LLVM IR (-O0):
@stderr = global i32 0
@.str = [33 x i8] c"usage: %s path arg0 [ arg ... ]\0A\00"
@.str.1 = [24 x i8] c"%s: execv() failed: %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 i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp slt 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 (i32, i8*, i8*, ...) @fprintf(i32 %10, i8* getelementptr inbounds ([33 x i8], [33 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
store i8* %19, i8** %6
%20 = load i8*, i8** %6
%21 = load i8**, i8*** %5
%22 = getelementptr inbounds i8*, i8** %21, i64 2
%23 = call i32 @execv(i8* %20, i8** %22)
%24 = load i32, i32* @stderr
%25 = load i8**, i8*** %5
%26 = getelementptr inbounds i8*, i8** %25, i64 0
%27 = load i8*, i8** %26
%28 = load i32, i32* @errno
%29 = call i8* @strerror(i32 %28)
%30 = call i32 (i32, i8*, i8*, ...) @fprintf(i32 %24, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i8* %27, i8* %29)
%31 = call i32 @exit(i32 1)
unreachable
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [33 x i8] c"usage: %s path arg0 [ arg ... ]\0A\00"
@.str.1 = [24 x i8] c"%s: execv() failed: %s\0A\00"
@errno = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = icmp slt i32 %0, 3
br i1 %3, label %4, label %9
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 (i32, i8*, i8*, ...) @fprintf(i32 %5, i8* getelementptr inbounds ([33 x i8], [33 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 = tail call i32 @execv(i8* %11, i8** %12)
%14 = load i32, i32* @stderr
%15 = load i8*, i8** %1
%16 = load i32, i32* @errno
%17 = tail call i8* @strerror(i32 %16)
%18 = tail call i32 (i32, i8*, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.1, i64 0, i64 0), i8* %15, i8* %17)
%19 = tail call i32 @exit(i32 1)
unreachable
}