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

/* Variables and functions */
int /*<<< orphan*/ *fopen(char *, char *);
int fscanf(int /*<<< orphan*/ *, char *, long *);
pid_t GetPid(char *sFilename) {
  FILE *hFilename;
  long ldPid;
  hFilename = fopen(sFilename, "r");
  if (hFilename == NULL) {
    return -1;
  }
  if (fscanf(hFilename, "%ld", &ldPid) == 1) {
    return (pid_t)ldPid;
  }
  return -1;
}


x86 assembly (clang, -O0):
<GetPid>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xec9(%rip),%rsi
call   1040 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    1157 <GetPid+0x37>
movl   $0xffffffff,-0x4(%rbp)
jmp    1187 <GetPid+0x67>
mov    -0x18(%rbp),%rdi
lea    0xea0(%rip),%rsi
lea    -0x20(%rbp),%rdx
call   1030 <fscanf@plt>
cmp    $0x1,%eax
jne    1180 <GetPid+0x60>
mov    -0x20(%rbp),%rax
mov    %eax,-0x4(%rbp)
jmp    1187 <GetPid+0x67>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<GetPid>:
push   %rbx
sub    $0x10,%rsp
lea    0xed4(%rip),%rsi
call   1040 <fopen@plt>
mov    $0xffffffff,%ebx
test   %rax,%rax
je     1158 <GetPid+0x38>
lea    0xec0(%rip),%rsi
lea    0x8(%rsp),%rdx
mov    %rax,%rdi
call   1030 <fscanf@plt>
cmp    $0x1,%eax
jne    1158 <GetPid+0x38>
mov    0x8(%rsp),%ebx
mov    %ebx,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@.str.1 = [4 x i8] c"%ld\00"
define i32 @GetPid(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
store i8* %0, i8** %3
%6 = load i8*, i8** %3
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %4
%8 = load i32*, i32** %4
%9 = icmp eq i32* %8, null
br i1 %9, label %10, label %11
10: ; preds = %1
store i32 -1, i32* %2
br label %19
11: ; preds = %1
%12 = load i32*, i32** %4
%13 = call i32 @fscanf(i32* %12, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i64* %5)
%14 = icmp eq i32 %13, 1
br i1 %14, label %15, label %18
15: ; preds = %11
%16 = load i64, i64* %5
%17 = trunc i64 %16 to i32
store i32 %17, i32* %2
br label %19
18: ; preds = %11
store i32 -1, i32* %2
br label %19
19: ; preds = %18, %15, %10
%20 = load i32, i32* %2
ret i32 %20
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@.str.1 = [4 x i8] c"%ld\00"
define i32 @GetPid(i8* nocapture %0) {
%2 = alloca i64
%3 = bitcast i64* %2 to i8*
%4 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%5 = icmp eq i32* %4, null
br i1 %5, label %12, label %6
6: ; preds = %1
%7 = call i32 @fscanf(i32* %4, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i64* %2)
%8 = icmp eq i32 %7, 1
br i1 %8, label %9, label %12
9: ; preds = %6
%10 = load i64, i64* %2
%11 = trunc i64 %10 to i32
br label %12
12: ; preds = %6, %1, %9
%13 = phi i32 [ %11, %9 ], [ -1, %1 ], [ -1, %6 ]
ret i32 %13
}