#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*/ SEEK_END;
char *calloc(int, long);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char const *, char *);
int /*<<< orphan*/ fputs(char *, int /*<<< orphan*/);
int fread(char *, long, int, int /*<<< orphan*/ *);
int /*<<< orphan*/ free(char *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, long, int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
int /*<<< orphan*/ perror(char const *);
int /*<<< orphan*/ rewind(int /*<<< orphan*/ *);
int /*<<< orphan*/ stderr;
char *load_welcome(const char *filename) {
  FILE *fp;
  long fsize;
  char *buffer;
  fp = fopen(filename, "r");
  if (!fp) {
    perror(filename);
    return NULL;
  }
  fseek(fp, 0L, SEEK_END);
  fsize = ftell(fp);
  rewind(fp);
  buffer = calloc(1, (fsize + 1) * sizeof(char));
  if (!buffer) {
    fclose(fp);
    fputs("memory alloc failed.", stderr);
    return NULL;
  }
  if (1 != fread(buffer, fsize, 1, fp)) {
    fclose(fp);
    free(buffer);
    fputs("entire read fails", stderr);
    return NULL;
  }
  fclose(fp);
  return buffer;
}


x86 assembly (clang, -O0):
<load_welcome>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xe49(%rip),%rsi
call   10b0 <fopen@plt>
mov    %rax,-0x18(%rbp)
cmpq   $0x0,-0x18(%rbp)
jne    11e1 <load_welcome+0x41>
mov    -0x10(%rbp),%rdi
call   10c0 <perror@plt>
movq   $0x0,-0x8(%rbp)
jmp    12c7 <load_welcome+0x127>
mov    -0x18(%rbp),%rdi
mov    0x2dfc(%rip),%rax
mov    (%rax),%edx
xor    %eax,%eax
mov    %eax,%esi
call   10a0 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1090 <ftell@plt>
mov    %rax,-0x20(%rbp)
mov    -0x18(%rbp),%rdi
call   1060 <rewind@plt>
mov    -0x20(%rbp),%rsi
add    $0x1,%rsi
shl    $0x0,%rsi
mov    $0x1,%edi
call   1080 <calloc@plt>
mov    %rax,-0x28(%rbp)
cmpq   $0x0,-0x28(%rbp)
jne    125d <load_welcome+0xbd>
mov    -0x18(%rbp),%rdi
call   1050 <fclose@plt>
mov    0x2d96(%rip),%rax
mov    (%rax),%esi
lea    0xdb7(%rip),%rdi
call   1070 <fputs@plt>
movq   $0x0,-0x8(%rbp)
jmp    12c7 <load_welcome+0x127>
mov    -0x28(%rbp),%rdi
mov    -0x20(%rbp),%rsi
mov    -0x18(%rbp),%rcx
mov    $0x1,%edx
call   1040 <fread@plt>
mov    %eax,%ecx
mov    $0x1,%eax
cmp    %ecx,%eax
je     12b6 <load_welcome+0x116>
mov    -0x18(%rbp),%rdi
call   1050 <fclose@plt>
mov    -0x28(%rbp),%rdi
call   1030 <free@plt>
mov    0x2d3d(%rip),%rax
mov    (%rax),%esi
lea    0xd73(%rip),%rdi
call   1070 <fputs@plt>
movq   $0x0,-0x8(%rbp)
jmp    12c7 <load_welcome+0x127>
mov    -0x18(%rbp),%rdi
call   1050 <fclose@plt>
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<load_welcome>:
push   %rbp
push   %r15
push   %r14
push   %rbx
push   %rax
mov    %rdi,%r14
lea    0xe4f(%rip),%rsi
call   10b0 <fopen@plt>
test   %rax,%rax
je     1268 <load_welcome+0xc8>
mov    %rax,%rbx
mov    0x2e1f(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   10a0 <fseek@plt>
mov    %rbx,%rdi
call   1090 <ftell@plt>
mov    %rax,%r15
mov    %rbx,%rdi
call   1060 <rewind@plt>
lea    0x1(%r15),%rsi
mov    $0x1,%edi
call   1080 <calloc@plt>
test   %rax,%rax
je     123a <load_welcome+0x9a>
mov    %rax,%r14
mov    %rax,%rdi
mov    %r15,%rsi
mov    $0x1,%edx
mov    %rbx,%rcx
call   1040 <fread@plt>
mov    %eax,%ebp
mov    %rbx,%rdi
call   1050 <fclose@plt>
cmp    $0x1,%ebp
je     125a <load_welcome+0xba>
mov    %r14,%rdi
call   1030 <free@plt>
mov    0x2da9(%rip),%rax
mov    (%rax),%esi
lea    0xddf(%rip),%rdi
jmp    1252 <load_welcome+0xb2>
mov    %rbx,%rdi
call   1050 <fclose@plt>
mov    0x2d8f(%rip),%rax
mov    (%rax),%esi
lea    0xdb0(%rip),%rdi
call   1070 <fputs@plt>
xor    %r14d,%r14d
mov    %r14,%rax
add    $0x8,%rsp
pop    %rbx
pop    %r14
pop    %r15
pop    %rbp
ret
mov    %r14,%rdi
call   10c0 <perror@plt>
jmp    1257 <load_welcome+0xb7>

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@.str.1 = [21 x i8] c"memory alloc failed.\00"
@stderr = global i32 0
@.str.2 = [18 x i8] c"entire read fails\00"
define i8* @load_welcome(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i32*
%5 = alloca i64
%6 = alloca i8*
store i8* %0, i8** %3
%7 = load i8*, i8** %3
%8 = call i32* @fopen(i8* %7, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %8, i32** %4
%9 = load i32*, i32** %4
%10 = icmp ne i32* %9, null
br i1 %10, label %14, label %11
11: ; preds = %1
%12 = load i8*, i8** %3
%13 = call i32 @perror(i8* %12)
store i8* null, i8** %2
br label %50
14: ; preds = %1
%15 = load i32*, i32** %4
%16 = load i32, i32* @SEEK_END
%17 = call i32 @fseek(i32* %15, i64 0, i32 %16)
%18 = load i32*, i32** %4
%19 = call i64 @ftell(i32* %18)
store i64 %19, i64* %5
%20 = load i32*, i32** %4
%21 = call i32 @rewind(i32* %20)
%22 = load i64, i64* %5
%23 = add nsw i64 %22, 1
%24 = mul i64 %23, 1
%25 = call i8* @calloc(i32 1, i64 %24)
store i8* %25, i8** %6
%26 = load i8*, i8** %6
%27 = icmp ne i8* %26, null
br i1 %27, label %33, label %28
28: ; preds = %14
%29 = load i32*, i32** %4
%30 = call i32 @fclose(i32* %29)
%31 = load i32, i32* @stderr
%32 = call i32 @fputs(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), i32 %31)
store i8* null, i8** %2
br label %50
33: ; preds = %14
%34 = load i8*, i8** %6
%35 = load i64, i64* %5
%36 = load i32*, i32** %4
%37 = call i32 @fread(i8* %34, i64 %35, i32 1, i32* %36)
%38 = icmp ne i32 1, %37
br i1 %38, label %39, label %46
39: ; preds = %33
%40 = load i32*, i32** %4
%41 = call i32 @fclose(i32* %40)
%42 = load i8*, i8** %6
%43 = call i32 @free(i8* %42)
%44 = load i32, i32* @stderr
%45 = call i32 @fputs(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32 %44)
store i8* null, i8** %2
br label %50
46: ; preds = %33
%47 = load i32*, i32** %4
%48 = call i32 @fclose(i32* %47)
%49 = load i8*, i8** %6
store i8* %49, i8** %2
br label %50
50: ; preds = %46, %39, %28, %11
%51 = load i8*, i8** %2
ret i8* %51
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@.str.1 = [21 x i8] c"memory alloc failed.\00"
@stderr = global i32 0
@.str.2 = [18 x i8] c"entire read fails\00"
define i8* @load_welcome(i8* nocapture %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 %6
4: ; preds = %1
%5 = tail call i32 @perror(i8* %0)
br label %26
6: ; preds = %1
%7 = load i32, i32* @SEEK_END
%8 = tail call i32 @fseek(i32* %2, i64 0, i32 %7)
%9 = tail call i64 @ftell(i32* %2)
%10 = tail call i32 @rewind(i32* %2)
%11 = add nsw i64 %9, 1
%12 = tail call i8* @calloc(i32 1, i64 %11)
%13 = icmp eq i8* %12, null
br i1 %13, label %14, label %18
14: ; preds = %6
%15 = tail call i32 @fclose(i32* %2)
%16 = load i32, i32* @stderr
%17 = tail call i32 @fputs(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.1, i64 0, i64 0), i32 %16)
br label %26
18: ; preds = %6
%19 = tail call i32 @fread(i8* %12, i64 %9, i32 1, i32* %2)
%20 = icmp eq i32 %19, 1
%21 = tail call i32 @fclose(i32* %2)
br i1 %20, label %26, label %22
22: ; preds = %18
%23 = tail call i32 @free(i8* %12)
%24 = load i32, i32* @stderr
%25 = tail call i32 @fputs(i8* getelementptr inbounds ([18 x i8], [18 x i8]* @.str.2, i64 0, i64 0), i32 %24)
br label %26
26: ; preds = %18, %22, %14, %4
%27 = phi i8* [ null, %22 ], [ null, %14 ], [ null, %4 ], [ %12, %18 ]
ret i8* %27
}