#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*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fscanf(int /*<<< orphan*/ *, char *, int *);
int plat_get_bat_capacity(void) {
  FILE *f;
  int ret = 0;
  f = fopen("/sys/class/power_supply/bq27500-0/capacity", "r");
  if (f) {
    fscanf(f, "%d", &ret);
    fclose(f);
  }
  return ret;
}


x86 assembly (clang, -O0):
<plat_get_bat_capacity>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0xc(%rbp)
lea    0xeba(%rip),%rdi
lea    0xede(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x8(%rbp)
cmpq   $0x0,-0x8(%rbp)
je     117e <plat_get_bat_capacity+0x4e>
mov    -0x8(%rbp),%rdi
lea    0xec1(%rip),%rsi
lea    -0xc(%rbp),%rdx
call   1040 <fscanf@plt>
mov    -0x8(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0xc(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<plat_get_bat_capacity>:
push   %rbx
sub    $0x10,%rsp
movl   $0x0,0xc(%rsp)
lea    0xebc(%rip),%rdi
lea    0xee0(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     117a <plat_get_bat_capacity+0x4a>
mov    %rax,%rbx
lea    0xece(%rip),%rsi
lea    0xc(%rsp),%rdx
mov    %rax,%rdi
call   1040 <fscanf@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    0xc(%rsp),%eax
jmp    117c <plat_get_bat_capacity+0x4c>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [43 x i8] c"/sys/class/power_supply/bq27500-0/capacity\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [3 x i8] c"%d\00"
define i32 @plat_get_bat_capacity() {
%1 = alloca i32*
%2 = alloca i32
store i32 0, i32* %2
%3 = call i32* @fopen(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
store i32* %3, i32** %1
%4 = load i32*, i32** %1
%5 = icmp ne i32* %4, null
br i1 %5, label %6, label %11
6: ; preds = %0
%7 = load i32*, i32** %1
%8 = call i32 @fscanf(i32* %7, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %2)
%9 = load i32*, i32** %1
%10 = call i32 @fclose(i32* %9)
br label %11
11: ; preds = %6, %0
%12 = load i32, i32* %2
ret i32 %12
}

LLVM IR (-O2):
@.str = [43 x i8] c"/sys/class/power_supply/bq27500-0/capacity\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [3 x i8] c"%d\00"
define i32 @plat_get_bat_capacity() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
store i32 0, i32* %1
%3 = tail call i32* @fopen(i8* getelementptr inbounds ([43 x i8], [43 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %9, label %5
5: ; preds = %0
%6 = call i32 @fscanf(i32* %3, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0), i32* %1)
%7 = call i32 @fclose(i32* %3)
%8 = load i32, i32* %1
br label %9
9: ; preds = %5, %0
%10 = phi i32 [ %8, %5 ], [ 0, %0 ]
ret i32 %10
}