#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*/ Error(char *, char *, int /*<<< orphan*/);
int /*<<< orphan*/ errno;
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ fflush(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ strerror(int /*<<< orphan*/);
void touch(char *path) {
  FILE *f = fopen(path, "w");
  if (f == NULL)
    Error("fopen: %s %s\n", path, strerror(errno));
  fclose(f);
  fflush(f);
}


x86 assembly (clang, -O0):
<touch>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe99(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
jne    11a3 <touch+0x53>
mov    -0x8(%rbp),%rax
mov    %rax,-0x18(%rbp)
mov    0x2e56(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
mov    -0x18(%rbp),%rsi
mov    %eax,%edx
lea    0xe64(%rip),%rdi
call   1040 <Error@plt>
mov    -0x10(%rbp),%rdi
call   1030 <fclose@plt>
mov    -0x10(%rbp),%rdi
call   1050 <fflush@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<touch>:
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xea2(%rip),%rsi
call   1060 <fopen@plt>
mov    %rax,%rbx
test   %rax,%rax
jne    118a <touch+0x3a>
mov    0x2e6e(%rip),%rax
mov    (%rax),%edi
call   1070 <strerror@plt>
lea    0xe82(%rip),%rdi
mov    %r14,%rsi
mov    %eax,%edx
call   1040 <Error@plt>
mov    %rbx,%rdi
call   1030 <fclose@plt>
mov    %rbx,%rdi
add    $0x8,%rsp
pop    %rbx
pop    %r14
jmp    1050 <fflush@plt>

LLVM IR (-O0):
@.str = [2 x i8] c"w\00"
@.str.1 = [14 x i8] c"fopen: %s %s\0A\00"
@errno = global i32 0
define void @touch(i8* %0) {
%2 = alloca i8*
%3 = alloca i32*
store i8* %0, i8** %2
%4 = load i8*, i8** %2
%5 = call i32* @fopen(i8* %4, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %5, i32** %3
%6 = load i32*, i32** %3
%7 = icmp eq i32* %6, null
br i1 %7, label %8, label %13
8: ; preds = %1
%9 = load i8*, i8** %2
%10 = load i32, i32* @errno
%11 = call i32 @strerror(i32 %10)
%12 = call i32 @Error(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8* %9, i32 %11)
br label %13
13: ; preds = %8, %1
%14 = load i32*, i32** %3
%15 = call i32 @fclose(i32* %14)
%16 = load i32*, i32** %3
%17 = call i32 @fflush(i32* %16)
ret void
}

LLVM IR (-O2):
@.str = [2 x i8] c"w\00"
@.str.1 = [14 x i8] c"fopen: %s %s\0A\00"
@errno = global i32 0
define void @touch(i8* %0) {
%2 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32* %2, null
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = load i32, i32* @errno
%6 = tail call i32 @strerror(i32 %5)
%7 = tail call i32 @Error(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8* %0, i32 %6)
br label %8
8: ; preds = %4, %1
%9 = tail call i32 @fclose(i32* %2)
%10 = tail call i32 @fflush(i32* %2)
ret void
}