#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 execvp(char *, char **);
int /*<<< orphan*/ perror(char *);
int main(int argc, char *argv[]) {
  char *cp[3];
  int ret;
  cp[0] = "cat";
  cp[1] = "/proc/cpuinfo";
  cp[2] = NULL;
  ret = execvp(cp[0], cp);
  if (ret == -1)
    perror("execvp");
  return 0;
}


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)
lea    0xec3(%rip),%rax
mov    %rax,-0x30(%rbp)
lea    0xebc(%rip),%rax
mov    %rax,-0x28(%rbp)
movq   $0x0,-0x20(%rbp)
mov    -0x30(%rbp),%rdi
lea    -0x30(%rbp),%rsi
call   1040 <execvp@plt>
mov    %eax,-0x34(%rbp)
cmpl   $0xffffffff,-0x34(%rbp)
jne    117a <main+0x5a>
lea    0xe9d(%rip),%rdi
call   1030 <perror@plt>
xor    %eax,%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
sub    $0x18,%rsp
lea    0xed5(%rip),%rdi
mov    %rdi,(%rsp)
lea    0xece(%rip),%rax
mov    %rax,0x8(%rsp)
movq   $0x0,0x10(%rsp)
mov    %rsp,%rsi
call   1040 <execvp@plt>
cmp    $0xffffffff,%eax
je     1158 <main+0x38>
xor    %eax,%eax
add    $0x18,%rsp
ret
lea    0xeb3(%rip),%rdi
call   1030 <perror@plt>
jmp    1151 <main+0x31>

LLVM IR (-O0):
@.str = [4 x i8] c"cat\00"
@.str.1 = [14 x i8] c"/proc/cpuinfo\00"
@.str.2 = [7 x i8] c"execvp\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca [3 x i8*]
%7 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = getelementptr inbounds [3 x i8*], [3 x i8*]* %6, i64 0, i64 0
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %8
%9 = getelementptr inbounds [3 x i8*], [3 x i8*]* %6, i64 0, i64 1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8** %9
%10 = getelementptr inbounds [3 x i8*], [3 x i8*]* %6, i64 0, i64 2
store i8* null, i8** %10
%11 = getelementptr inbounds [3 x i8*], [3 x i8*]* %6, i64 0, i64 0
%12 = load i8*, i8** %11
%13 = getelementptr inbounds [3 x i8*], [3 x i8*]* %6, i64 0, i64 0
%14 = call i32 @execvp(i8* %12, i8** %13)
store i32 %14, i32* %7
%15 = load i32, i32* %7
%16 = icmp eq i32 %15, -1
br i1 %16, label %17, label %19
17: ; preds = %2
%18 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0))
br label %19
19: ; preds = %17, %2
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"cat\00"
@.str.1 = [14 x i8] c"/proc/cpuinfo\00"
@.str.2 = [7 x i8] c"execvp\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = alloca [3 x i8*]
%4 = bitcast [3 x i8*]* %3 to i8*
%5 = getelementptr inbounds [3 x i8*], [3 x i8*]* %3, i64 0, i64 0
store i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %5
%6 = getelementptr inbounds [3 x i8*], [3 x i8*]* %3, i64 0, i64 1
store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8** %6
%7 = getelementptr inbounds [3 x i8*], [3 x i8*]* %3, i64 0, i64 2
store i8* null, i8** %7
%8 = call i32 @execvp(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8** %5)
%9 = icmp eq i32 %8, -1
br i1 %9, label %10, label %12
10: ; preds = %2
%11 = call i32 @perror(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0))
br label %12
12: ; preds = %10, %2
ret i32 0
}