#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 */
typedef int /*<<< orphan*/ FILE;

/* Variables and functions */
int /*<<< orphan*/ BUG(char *);
scalar_t__ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int fscanf(int /*<<< orphan*/ *, char *, unsigned int *);
void get_meminfo(unsigned int *policy_memory) {
  FILE *fp = fopen("/sys/kernel/security/tomoyo/meminfo", "r");
  if (!fp || fscanf(fp, "Policy: %u", policy_memory) != 1 || fclose(fp))
    BUG("BUG: Policy read error\n");
}


x86 assembly (clang, -O0):
<get_meminfo>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xead(%rip),%rdi
lea    0xeca(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     119e <get_meminfo+0x5e>
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%rdx
lea    0xea9(%rip),%rsi
call   1050 <fscanf@plt>
cmp    $0x1,%eax
jne    119e <get_meminfo+0x5e>
mov    -0x10(%rbp),%rdi
call   1040 <fclose@plt>
cmp    $0x0,%rax
je     11aa <get_meminfo+0x6a>
lea    0xe8c(%rip),%rdi
call   1030 <BUG@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<get_meminfo>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xeb2(%rip),%rdi
lea    0xecf(%rip),%rsi
call   1060 <fopen@plt>
test   %rax,%rax
je     1186 <get_meminfo+0x46>
mov    %rax,%rbx
lea    0xebd(%rip),%rsi
mov    %rax,%rdi
mov    %r14,%rdx
call   1050 <fscanf@plt>
cmp    $0x1,%eax
jne    1186 <get_meminfo+0x46>
mov    %rbx,%rdi
call   1040 <fclose@plt>
test   %rax,%rax
je     1199 <get_meminfo+0x59>
lea    0xea4(%rip),%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <BUG@plt>
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [36 x i8] c"/sys/kernel/security/tomoyo/meminfo\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [11 x i8] c"Policy: %u\00"
@.str.3 = [24 x i8] c"BUG: Policy read error\0A\00"
define void @get_meminfo(i32* %0) {
%2 = alloca i32*
%3 = alloca i32*
store i32* %0, i32** %2
%4 = call i32* @fopen(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %4, i32** %3
%5 = load i32*, i32** %3
%6 = icmp ne i32* %5, null
br i1 %6, label %7, label %16
7: ; preds = %1
%8 = load i32*, i32** %3
%9 = load i32*, i32** %2
%10 = call i32 @fscanf(i32* %8, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32* %9)
%11 = icmp ne i32 %10, 1
br i1 %11, label %16, label %12
12: ; preds = %7
%13 = load i32*, i32** %3
%14 = call i64 @fclose(i32* %13)
%15 = icmp ne i64 %14, 0
br i1 %15, label %16, label %18
16: ; preds = %12, %7, %1
%17 = call i32 @BUG(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0))
br label %18
18: ; preds = %16, %12
ret void
}

LLVM IR (-O2):
@.str = [36 x i8] c"/sys/kernel/security/tomoyo/meminfo\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [11 x i8] c"Policy: %u\00"
@.str.3 = [24 x i8] c"BUG: Policy read error\0A\00"
define void @get_meminfo(i32* %0) {
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %10, label %4
4: ; preds = %1
%5 = tail call i32 @fscanf(i32* %2, i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0), i32* %0)
%6 = icmp eq i32 %5, 1
br i1 %6, label %7, label %10
7: ; preds = %4
%8 = tail call i64 @fclose(i32* %2)
%9 = icmp eq i64 %8, 0
br i1 %9, label %12, label %10
10: ; preds = %7, %4, %1
%11 = tail call i32 @BUG(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.3, i64 0, i64 0))
br label %12
12: ; preds = %10, %7
ret void
}