#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 *, float *, float *,
                          float *);
void gather_loadavg(float load[3]) {
  FILE *f = fopen("/proc/loadavg", "r");
  if (f != NULL) {
    fscanf(f, "%f %f %f", load + 0, load + 1, load + 2);
    fclose(f);
  }
}


x86 assembly (clang, -O0):
<gather_loadavg>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
lea    0xebd(%rip),%rdi
lea    0xec4(%rip),%rsi
call   1050 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     118b <gather_loadavg+0x5b>
mov    -0x10(%rbp),%rdi
mov    -0x8(%rbp),%rdx
mov    -0x8(%rbp),%rcx
add    $0x4,%rcx
mov    -0x8(%rbp),%r8
add    $0x8,%r8
lea    0xe93(%rip),%rsi
call   1040 <fscanf@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<gather_loadavg>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xec2(%rip),%rdi
lea    0xec9(%rip),%rsi
call   1050 <fopen@plt>
test   %rax,%rax
je     117b <gather_loadavg+0x4b>
mov    %rax,%rbx
lea    0x4(%r14),%rcx
lea    0x8(%r14),%r8
lea    0xeaf(%rip),%rsi
mov    %rax,%rdi
mov    %r14,%rdx
call   1040 <fscanf@plt>
mov    %rbx,%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1030 <fclose@plt>
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [14 x i8] c"/proc/loadavg\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [9 x i8] c"%f %f %f\00"
define void @gather_loadavg(float* %0) {
%2 = alloca float*
%3 = alloca i32*
store float* %0, float** %2
%4 = call i32* @fopen(i8* getelementptr inbounds ([14 x i8], [14 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 %18
7: ; preds = %1
%8 = load i32*, i32** %3
%9 = load float*, float** %2
%10 = getelementptr inbounds float, float* %9, i64 0
%11 = load float*, float** %2
%12 = getelementptr inbounds float, float* %11, i64 1
%13 = load float*, float** %2
%14 = getelementptr inbounds float, float* %13, i64 2
%15 = call i32 @fscanf(i32* %8, i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), float* %10, float* %12, float* %14)
%16 = load i32*, i32** %3
%17 = call i32 @fclose(i32* %16)
br label %18
18: ; preds = %7, %1
ret void
}

LLVM IR (-O2):
@.str = [14 x i8] c"/proc/loadavg\00"
@.str.1 = [2 x i8] c"r\00"
@.str.2 = [9 x i8] c"%f %f %f\00"
define void @gather_loadavg(float* %0) {
%2 = tail call i32* @fopen(i8* getelementptr inbounds ([14 x i8], [14 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 %9, label %4
4: ; preds = %1
%5 = getelementptr inbounds float, float* %0, i64 1
%6 = getelementptr inbounds float, float* %0, i64 2
%7 = tail call i32 @fscanf(i32* %2, i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.2, i64 0, i64 0), float* %0, float* %5, float* %6)
%8 = tail call i32 @fclose(i32* %2)
br label %9
9: ; preds = %4, %1
ret void
}