#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*/ exit(int);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fprintf(int /*<<< orphan*/, char *, ...);
unsigned int fread(char *, int, unsigned int, int /*<<< orphan*/ *);
scalar_t__ malloc(unsigned int);
int /*<<< orphan*/ stderr;
char *readfile(char *name, unsigned int size) {
  FILE *f;
  char *buf;
  f = fopen(name, "rb");
  if (f == NULL) {
    fprintf(stderr, "Cannot open file %s\n", name);
    exit(0);
  }
  buf = (char *)malloc(size);
  if (!buf) {
    fprintf(stderr, "error while malloc(%u)\n", size);
    fclose(f);
    exit(1);
  }
  if (fread(buf, 1, size, f) != size) {
    fprintf(stderr, "Error while reading file %s\n", name);
    fclose(f);
    exit(0);
  }
  fclose(f);
  return buf;
}


x86 assembly (clang, -O0):
<readfile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe86(%rip),%rsi
call   1070 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11b0 <readfile+0x50>
mov    0x2e4b(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xe61(%rip),%rsi
mov    $0x0,%al
call   1050 <fprintf@plt>
xor    %edi,%edi
call   1080 <exit@plt>
mov    -0xc(%rbp),%edi
call   1060 <malloc@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
jne    11f4 <readfile+0x94>
mov    0x2e12(%rip),%rax
mov    (%rax),%edi
mov    -0xc(%rbp),%edx
lea    0xe3e(%rip),%rsi
mov    $0x0,%al
call   1050 <fprintf@plt>
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
mov    $0x1,%edi
call   1080 <exit@plt>
mov    -0x20(%rbp),%rdi
mov    -0xc(%rbp),%edx
mov    -0x18(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
cmp    -0xc(%rbp),%eax
je     123d <readfile+0xdd>
mov    0x2dc7(%rip),%rax
mov    (%rax),%edi
mov    -0x8(%rbp),%rdx
lea    0xe0a(%rip),%rsi
mov    $0x0,%al
call   1050 <fprintf@plt>
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
xor    %edi,%edi
call   1080 <exit@plt>
mov    -0x18(%rbp),%rdi
call   1040 <fclose@plt>
mov    -0x20(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<readfile>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %esi,%ebp
mov    %rdi,%r14
lea    0xe8d(%rip),%rsi
call   1070 <fopen@plt>
test   %rax,%rax
je     11bb <readfile+0x5b>
mov    %rax,%r15
mov    %ebp,%edi
call   1060 <malloc@plt>
test   %rax,%rax
je     11dc <readfile+0x7c>
mov    %rax,%rbx
mov    %rax,%rdi
mov    $0x1,%esi
mov    %ebp,%edx
mov    %r15,%rcx
call   1030 <fread@plt>
cmp    %ebp,%eax
jne    1207 <readfile+0xa7>
mov    %r15,%rdi
call   1040 <fclose@plt>
mov    %rbx,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret
mov    0x2e1e(%rip),%rax
mov    (%rax),%edi
lea    0xe38(%rip),%rsi
mov    %r14,%rdx
xor    %eax,%eax
call   1050 <fprintf@plt>
xor    %edi,%edi
call   1080 <exit@plt>
mov    0x2dfd(%rip),%rax
mov    (%rax),%edi
lea    0xe2c(%rip),%rsi
mov    %ebp,%edx
xor    %eax,%eax
call   1050 <fprintf@plt>
mov    %r15,%rdi
call   1040 <fclose@plt>
mov    $0x1,%edi
call   1080 <exit@plt>
mov    0x2dd2(%rip),%rax
mov    (%rax),%edi
lea    0xe19(%rip),%rsi
mov    %r14,%rdx
xor    %eax,%eax
call   1050 <fprintf@plt>
mov    %r15,%rdi
call   1040 <fclose@plt>
xor    %edi,%edi
call   1080 <exit@plt>

LLVM IR (-O0):
@.str = [3 x i8] c"rb\00"
@stderr = global i32 0
@.str.1 = [21 x i8] c"Cannot open file %s\0A\00"
@.str.2 = [24 x i8] c"error while malloc(%u)\0A\00"
@.str.3 = [29 x i8] c"Error while reading file %s\0A\00"
define i8* @readfile(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i32*
%6 = alloca i8*
store i8* %0, i8** %3
store i32 %1, i32* %4
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %5
%9 = load i32*, i32** %5
%10 = icmp eq i32* %9, null
br i1 %10, label %11, label %16
11: ; preds = %2
%12 = load i32, i32* @stderr
%13 = load i8*, i8** %3
%14 = call i32 (i32, i8*, ...) @fprintf(i32 %12, i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), i8* %13)
%15 = call i32 @exit(i32 0)
unreachable
16: ; preds = %2
%17 = load i32, i32* %4
%18 = call i64 @malloc(i32 %17)
%19 = inttoptr i64 %18 to i8*
store i8* %19, i8** %6
%20 = load i8*, i8** %6
%21 = icmp ne i8* %20, null
br i1 %21, label %29, label %22
22: ; preds = %16
%23 = load i32, i32* @stderr
%24 = load i32, i32* %4
%25 = call i32 (i32, i8*, ...) @fprintf(i32 %23, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i32 %24)
%26 = load i32*, i32** %5
%27 = call i32 @fclose(i32* %26)
%28 = call i32 @exit(i32 1)
unreachable
29: ; preds = %16
%30 = load i8*, i8** %6
%31 = load i32, i32* %4
%32 = load i32*, i32** %5
%33 = call i32 @fread(i8* %30, i32 1, i32 %31, i32* %32)
%34 = load i32, i32* %4
%35 = icmp ne i32 %33, %34
br i1 %35, label %36, label %43
36: ; preds = %29
%37 = load i32, i32* @stderr
%38 = load i8*, i8** %3
%39 = call i32 (i32, i8*, ...) @fprintf(i32 %37, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i8* %38)
%40 = load i32*, i32** %5
%41 = call i32 @fclose(i32* %40)
%42 = call i32 @exit(i32 0)
unreachable
43: ; preds = %29
%44 = load i32*, i32** %5
%45 = call i32 @fclose(i32* %44)
%46 = load i8*, i8** %6
ret i8* %46
}

LLVM IR (-O2):
@.str = [3 x i8] c"rb\00"
@stderr = global i32 0
@.str.1 = [21 x i8] c"Cannot open file %s\0A\00"
@.str.2 = [24 x i8] c"error while malloc(%u)\0A\00"
@.str.3 = [29 x i8] c"Error while reading file %s\0A\00"
define i8* @readfile(i8* %0, i32 %1) {
%3 = tail call i32* @fopen(i8* %0, i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str, i64 0, i64 0))
%4 = icmp eq i32* %3, null
br i1 %4, label %5, label %9
5: ; preds = %2
%6 = load i32, i32* @stderr
%7 = tail call i32 (i32, i8*, ...) @fprintf(i32 %6, i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), i8* %0)
%8 = tail call i32 @exit(i32 0)
unreachable
9: ; preds = %2
%10 = tail call i64 @malloc(i32 %1)
%11 = inttoptr i64 %10 to i8*
%12 = icmp eq i64 %10, 0
br i1 %12, label %13, label %18
13: ; preds = %9
%14 = load i32, i32* @stderr
%15 = tail call i32 (i32, i8*, ...) @fprintf(i32 %14, i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0), i32 %1)
%16 = tail call i32 @fclose(i32* %3)
%17 = tail call i32 @exit(i32 1)
unreachable
18: ; preds = %9
%19 = tail call i32 @fread(i8* %11, i32 1, i32 %1, i32* %3)
%20 = icmp eq i32 %19, %1
br i1 %20, label %26, label %21
21: ; preds = %18
%22 = load i32, i32* @stderr
%23 = tail call i32 (i32, i8*, ...) @fprintf(i32 %22, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str.3, i64 0, i64 0), i8* %0)
%24 = tail call i32 @fclose(i32* %3)
%25 = tail call i32 @exit(i32 0)
unreachable
26: ; preds = %18
%27 = tail call i32 @fclose(i32* %3)
ret i8* %11
}