int choix_num_ligne(int i) {
  switch (i) {
  case 1:
    return 0;
  case 2:
    return 1;
  case 3:
    return 2;
  case 4:
    return 3;
  case 5:
    return 4;
  case 6:
    return 5;
  case 7:
    return 6;
  case 8:
    return 8;
  case 9:
    return 9;
  case 10:
    return 10;
  case 11:
    return 12;
  case 12:
    return 13;
  case 13:
    return 14;
  case 14:
    return 16;
  default:
    return -1;
  }
}


x86 assembly (clang, -O0):
<choix_num_ligne>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x8(%rbp)
mov    -0x8(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0xd,%eax
ja     11d8 <choix_num_ligne+0xd8>
mov    -0x10(%rbp),%rax
lea    0xed9(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
movl   $0x0,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x1,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x2,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x3,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x4,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x5,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x6,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x8,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x9,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0xa,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0xc,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0xd,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0xe,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0x10,-0x4(%rbp)
jmp    11df <choix_num_ligne+0xdf>
movl   $0xffffffff,-0x4(%rbp)
mov    -0x4(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<choix_num_ligne>:
add    $0xffffffff,%edi
mov    $0xffffffff,%eax
cmp    $0xd,%edi
ja     111a <choix_num_ligne+0x1a>
movslq %edi,%rax
lea    0xee9(%rip),%rcx
mov    (%rcx,%rax,4),%eax
ret

LLVM IR (-O0):
define i32 @choix_num_ligne(i32 %0) {
%2 = alloca i32
%3 = alloca i32
store i32 %0, i32* %3
%4 = load i32, i32* %3
switch i32 %4, label %19 [
i32 1, label %5
i32 2, label %6
i32 3, label %7
i32 4, label %8
i32 5, label %9
i32 6, label %10
i32 7, label %11
i32 8, label %12
i32 9, label %13
i32 10, label %14
i32 11, label %15
i32 12, label %16
i32 13, label %17
i32 14, label %18
]
5: ; preds = %1
store i32 0, i32* %2
br label %20
6: ; preds = %1
store i32 1, i32* %2
br label %20
7: ; preds = %1
store i32 2, i32* %2
br label %20
8: ; preds = %1
store i32 3, i32* %2
br label %20
9: ; preds = %1
store i32 4, i32* %2
br label %20
10: ; preds = %1
store i32 5, i32* %2
br label %20
11: ; preds = %1
store i32 6, i32* %2
br label %20
12: ; preds = %1
store i32 8, i32* %2
br label %20
13: ; preds = %1
store i32 9, i32* %2
br label %20
14: ; preds = %1
store i32 10, i32* %2
br label %20
15: ; preds = %1
store i32 12, i32* %2
br label %20
16: ; preds = %1
store i32 13, i32* %2
br label %20
17: ; preds = %1
store i32 14, i32* %2
br label %20
18: ; preds = %1
store i32 16, i32* %2
br label %20
19: ; preds = %1
store i32 -1, i32* %2
br label %20
20: ; preds = %19, %18, %17, %16, %15, %14, %13, %12, %11, %10, %9, %8, %7, %6, %5
%21 = load i32, i32* %2
ret i32 %21
}

LLVM IR (-O2):
@switch.table.choix_num_ligne = [14 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 8, i32 9, i32 10, i32 12, i32 13, i32 14, i32 16]
define i32 @choix_num_ligne(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 14
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = getelementptr inbounds [14 x i32], [14 x i32]* @switch.table.choix_num_ligne, i64 0, i64 %5
%7 = load i32, i32* %6
br label %8
8: ; preds = %1, %4
%9 = phi i32 [ %7, %4 ], [ -1, %1 ]
ret i32 %9
}