#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 */
struct stat {
  int st_mode;
};

/* Variables and functions */
scalar_t__ S_ISREG(int);
int S_IXUSR;
scalar_t__ stat(char *, struct stat *);
int execable(char *program) {
  struct stat buf;
  if (0 == stat(program, &buf)) {
    if (S_ISREG(buf.st_mode) && (S_IXUSR & buf.st_mode))
      return 1;
  }
  return 0;
}


x86 assembly (clang, -O0):
<execable>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    -0x18(%rbp),%rsi
call   1030 <stat@plt>
mov    %rax,%rcx
xor    %eax,%eax
cmp    %rcx,%rax
jne    117f <execable+0x5f>
mov    -0x18(%rbp),%edi
call   1040 <S_ISREG@plt>
cmp    $0x0,%rax
je     117a <execable+0x5a>
mov    0x2e88(%rip),%rax
mov    (%rax),%eax
and    -0x18(%rbp),%eax
cmp    $0x0,%eax
je     117a <execable+0x5a>
movl   $0x1,-0x4(%rbp)
jmp    1186 <execable+0x66>
jmp    117f <execable+0x5f>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<execable>:
push   %rax
mov    %rsp,%rsi
call   1030 <stat@plt>
test   %rax,%rax
je     1132 <execable+0x12>
xor    %eax,%eax
pop    %rcx
ret
mov    (%rsp),%edi
call   1040 <S_ISREG@plt>
test   %rax,%rax
je     112e <execable+0xe>
mov    0x2ea2(%rip),%rcx
mov    (%rsp),%edx
mov    $0x1,%eax
test   %edx,(%rcx)
jne    1130 <execable+0x10>
jmp    112e <execable+0xe>

LLVM IR (-O0):
%struct.stat = type { i32 }
@S_IXUSR = global i32 0
define i32 @execable(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca %struct.stat
store i8* %0, i8** %3
%5 = load i8*, i8** %3
%6 = call i64 @stat(i8* %5, %struct.stat* %4)
%7 = icmp eq i64 0, %6
br i1 %7, label %8, label %21
8: ; preds = %1
%9 = getelementptr inbounds %struct.stat, %struct.stat* %4, i32 0, i32 0
%10 = load i32, i32* %9
%11 = call i64 @S_ISREG(i32 %10)
%12 = icmp ne i64 %11, 0
br i1 %12, label %13, label %20
13: ; preds = %8
%14 = load i32, i32* @S_IXUSR
%15 = getelementptr inbounds %struct.stat, %struct.stat* %4, i32 0, i32 0
%16 = load i32, i32* %15
%17 = and i32 %14, %16
%18 = icmp ne i32 %17, 0
br i1 %18, label %19, label %20
19: ; preds = %13
store i32 1, i32* %2
br label %22
20: ; preds = %13, %8
br label %21
21: ; preds = %20, %1
store i32 0, i32* %2
br label %22
22: ; preds = %21, %19
%23 = load i32, i32* %2
ret i32 %23
}

LLVM IR (-O2):
%struct.stat = type { i32 }
@S_IXUSR = global i32 0
define i32 @execable(i8* %0) {
%2 = alloca %struct.stat
%3 = bitcast %struct.stat* %2 to i8*
%4 = call i64 @stat(i8* %0, %struct.stat* %2)
%5 = icmp eq i64 %4, 0
br i1 %5, label %6, label %16
6: ; preds = %1
%7 = getelementptr inbounds %struct.stat, %struct.stat* %2, i64 0, i32 0
%8 = load i32, i32* %7
%9 = call i64 @S_ISREG(i32 %8)
%10 = icmp eq i64 %9, 0
br i1 %10, label %16, label %11
11: ; preds = %6
%12 = load i32, i32* @S_IXUSR
%13 = load i32, i32* %7
%14 = and i32 %13, %12
%15 = icmp eq i32 %14, 0
br i1 %15, label %16, label %17
16: ; preds = %6, %11, %1
br label %17
17: ; preds = %11, %16
%18 = phi i32 [ 0, %16 ], [ 1, %11 ]
ret i32 %18
}