#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;
int /*<<< orphan*/ SEEK_SET;
int /*<<< orphan*/ erreur_1s(char *, char *);
int /*<<< orphan*/ fclose(int /*<<< orphan*/ *);
int /*<<< orphan*/ *fopen(char *, char *);
int /*<<< orphan*/ fread(char *, int, long, int /*<<< orphan*/ *);
int /*<<< orphan*/ fseek(int /*<<< orphan*/ *, int /*<<< orphan*/,
                         int /*<<< orphan*/);
long ftell(int /*<<< orphan*/ *);
char *malloc(long);
char *OReadFile(char *_filename) {
  char *str = 0;
  long nbChar;
  FILE *file = fopen(_filename, "r");
  if (file) {
    fseek(file, 0, SEEK_END);
    nbChar = ftell(file);
    fseek(file, 0, SEEK_SET);
    str = malloc(nbChar);
    if (str)
      fread(str, 1, nbChar, file);
    fclose(file);
  } else
    erreur_1s("Le fichier %s n'a pas pu être ouvert.", _filename);
  return str;
}


x86 assembly (clang, -O0):
<OReadFile>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
movq   $0x0,-0x10(%rbp)
mov    -0x8(%rbp),%rdi
lea    0xe71(%rip),%rsi
call   1090 <fopen@plt>
mov    %rax,-0x20(%rbp)
cmpq   $0x0,-0x20(%rbp)
je     1214 <OReadFile+0xa4>
mov    -0x20(%rbp),%rdi
mov    0x2e3a(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x20(%rbp),%rdi
call   1060 <ftell@plt>
mov    %rax,-0x18(%rbp)
mov    -0x20(%rbp),%rdi
mov    0x2e09(%rip),%rax
mov    (%rax),%edx
xor    %esi,%esi
call   1080 <fseek@plt>
mov    -0x18(%rbp),%rdi
call   1070 <malloc@plt>
mov    %rax,-0x10(%rbp)
cmpq   $0x0,-0x10(%rbp)
je     1206 <OReadFile+0x96>
mov    -0x10(%rbp),%rdi
mov    -0x18(%rbp),%rdx
mov    -0x20(%rbp),%rcx
mov    $0x1,%esi
call   1030 <fread@plt>
mov    -0x20(%rbp),%rdi
call   1040 <fclose@plt>
jmp    1224 <OReadFile+0xb4>
mov    -0x8(%rbp),%rsi
lea    0xde3(%rip),%rdi
call   1050 <erreur_1s@plt>
mov    -0x10(%rbp),%rax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<OReadFile>:
push   %r15
push   %r14
push   %rbx
mov    %rdi,%r14
lea    0xe81(%rip),%rsi
call   1090 <fopen@plt>
test   %rax,%rax
je     11ea <OReadFile+0x7a>
mov    %rax,%rbx
mov    0x2e55(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %rbx,%rdi
call   1060 <ftell@plt>
mov    %rax,%r15
mov    0x2e27(%rip),%rax
mov    (%rax),%edx
mov    %rbx,%rdi
xor    %esi,%esi
call   1080 <fseek@plt>
mov    %r15,%rdi
call   1070 <malloc@plt>
mov    %rax,%r14
test   %rax,%rax
je     11e0 <OReadFile+0x70>
mov    %r14,%rdi
mov    $0x1,%esi
mov    %r15,%rdx
mov    %rbx,%rcx
call   1030 <fread@plt>
mov    %rbx,%rdi
call   1040 <fclose@plt>
jmp    11fc <OReadFile+0x8c>
lea    0xe11(%rip),%rdi
mov    %r14,%rsi
call   1050 <erreur_1s@plt>
xor    %r14d,%r14d
mov    %r14,%rax
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
@.str.1 = [39 x i8] c"Le fichier %s n'a pas pu \C3\AAtre ouvert.\00"
define i8* @OReadFile(i8* %0) {
%2 = alloca i8*
%3 = alloca i8*
%4 = alloca i64
%5 = alloca i32*
store i8* %0, i8** %2
store i8* null, i8** %3
%6 = load i8*, i8** %2
%7 = call i32* @fopen(i8* %6, i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i64 0, i64 0))
store i32* %7, i32** %5
%8 = load i32*, i32** %5
%9 = icmp ne i32* %8, null
br i1 %9, label %10, label %31
10: ; preds = %1
%11 = load i32*, i32** %5
%12 = load i32, i32* @SEEK_END
%13 = call i32 @fseek(i32* %11, i32 0, i32 %12)
%14 = load i32*, i32** %5
%15 = call i64 @ftell(i32* %14)
store i64 %15, i64* %4
%16 = load i32*, i32** %5
%17 = load i32, i32* @SEEK_SET
%18 = call i32 @fseek(i32* %16, i32 0, i32 %17)
%19 = load i64, i64* %4
%20 = call i8* @malloc(i64 %19)
store i8* %20, i8** %3
%21 = load i8*, i8** %3
%22 = icmp ne i8* %21, null
br i1 %22, label %23, label %28
23: ; preds = %10
%24 = load i8*, i8** %3
%25 = load i64, i64* %4
%26 = load i32*, i32** %5
%27 = call i32 @fread(i8* %24, i32 1, i64 %25, i32* %26)
br label %28
28: ; preds = %23, %10
%29 = load i32*, i32** %5
%30 = call i32 @fclose(i32* %29)
br label %34
31: ; preds = %1
%32 = load i8*, i8** %2
%33 = call i32 @erreur_1s(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.1, i64 0, i64 0), i8* %32)
br label %34
34: ; preds = %31, %28
%35 = load i8*, i8** %3
ret i8* %35
}

LLVM IR (-O2):
@.str = [2 x i8] c"r\00"
@SEEK_END = global i32 0
@SEEK_SET = global i32 0
@.str.1 = [39 x i8] c"Le fichier %s n'a pas pu \C3\AAtre ouvert.\00"
define noalias i8* @OReadFile(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 %16, label %4
4: ; preds = %1
%5 = load i32, i32* @SEEK_END
%6 = tail call i32 @fseek(i32* %2, i32 0, i32 %5)
%7 = tail call i64 @ftell(i32* %2)
%8 = load i32, i32* @SEEK_SET
%9 = tail call i32 @fseek(i32* %2, i32 0, i32 %8)
%10 = tail call i8* @malloc(i64 %7)
%11 = icmp eq i8* %10, null
br i1 %11, label %14, label %12
12: ; preds = %4
%13 = tail call i32 @fread(i8* %10, i32 1, i64 %7, i32* %2)
br label %14
14: ; preds = %12, %4
%15 = tail call i32 @fclose(i32* %2)
br label %18
16: ; preds = %1
%17 = tail call i32 @erreur_1s(i8* getelementptr inbounds ([39 x i8], [39 x i8]* @.str.1, i64 0, i64 0), i8* %0)
br label %18
18: ; preds = %16, %14
%19 = phi i8* [ %10, %14 ], [ null, %16 ]
ret i8* %19
}