#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 */

/* Variables and functions */
int /*<<< orphan*/ printf(char *);
void print_day(int day) {
  switch (day) {
  case 1:
    printf("Monday\n");
    break;
  case 2:
    printf("Tuesday\n");
    break;
  case 3:
    printf("Wednesday\n");
    break;
  case 4:
    printf("Thursday\n");
    break;
  case 5:
    printf("Friday\n");
    break;
  case 6:
    printf("Saturday\n");
    break;
  case 7:
    printf("Sunday\n");
    break;
  default:
    printf("Illegal day number!\n");
    break;
  }
}


x86 assembly (clang, -O0):
<print_day>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0xffffffff,%eax
mov    %eax,%ecx
mov    %rcx,-0x10(%rbp)
sub    $0x6,%eax
ja     11bb <print_day+0xab>
mov    -0x10(%rbp),%rax
lea    0xec5(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
jmp    *%rax
lea    0xed1(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xec8(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xec0(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xeba(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xeb3(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xeaa(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xea3(%rip),%rdi
call   1030 <printf@plt>
jmp    11c7 <print_day+0xb7>
lea    0xe9a(%rip),%rdi
call   1030 <printf@plt>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_day>:
add    $0xffffffff,%edi
cmp    $0x6,%edi
ja     112e <print_day+0x1e>
movslq %edi,%rax
lea    0xf2e(%rip),%rcx
movslq (%rcx,%rax,4),%rdi
add    %rcx,%rdi
jmp    1030 <puts@plt>
lea    0xf04(%rip),%rdi
jmp    1030 <puts@plt>

LLVM IR (-O0):
@.str = [8 x i8] c"Monday\0A\00"
@.str.1 = [9 x i8] c"Tuesday\0A\00"
@.str.2 = [11 x i8] c"Wednesday\0A\00"
@.str.3 = [10 x i8] c"Thursday\0A\00"
@.str.4 = [8 x i8] c"Friday\0A\00"
@.str.5 = [10 x i8] c"Saturday\0A\00"
@.str.6 = [8 x i8] c"Sunday\0A\00"
@.str.7 = [21 x i8] c"Illegal day number!\0A\00"
define void @print_day(i32 %0) {
%2 = alloca i32
store i32 %0, i32* %2
%3 = load i32, i32* %2
switch i32 %3, label %18 [
i32 1, label %4
i32 2, label %6
i32 3, label %8
i32 4, label %10
i32 5, label %12
i32 6, label %14
i32 7, label %16
]
4: ; preds = %1
%5 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
br label %20
6: ; preds = %1
%7 = call i32 @printf(i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.1, i64 0, i64 0))
br label %20
8: ; preds = %1
%9 = call i32 @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.2, i64 0, i64 0))
br label %20
10: ; preds = %1
%11 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.3, i64 0, i64 0))
br label %20
12: ; preds = %1
%13 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.4, i64 0, i64 0))
br label %20
14: ; preds = %1
%15 = call i32 @printf(i8* getelementptr inbounds ([10 x i8], [10 x i8]* @.str.5, i64 0, i64 0))
br label %20
16: ; preds = %1
%17 = call i32 @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.6, i64 0, i64 0))
br label %20
18: ; preds = %1
%19 = call i32 @printf(i8* getelementptr inbounds ([21 x i8], [21 x i8]* @.str.7, i64 0, i64 0))
br label %20
20: ; preds = %18, %16, %14, %12, %10, %8, %6, %4
ret void
}

LLVM IR (-O2):
@str = [7 x i8] c"Sunday\00"
@str.8 = [9 x i8] c"Saturday\00"
@str.9 = [7 x i8] c"Friday\00"
@str.10 = [9 x i8] c"Thursday\00"
@str.11 = [10 x i8] c"Wednesday\00"
@str.12 = [8 x i8] c"Tuesday\00"
@str.13 = [7 x i8] c"Monday\00"
@str.14 = [20 x i8] c"Illegal day number!\00"
@reltable.print_day = [7 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @str.13 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([8 x i8]* @str.12 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([10 x i8]* @str.11 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @str.10 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @str.9 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([9 x i8]* @str.8 to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @str to i64), i64 ptrtoint ([7 x i32]* @reltable.print_day to i64)) to i32)]
define void @print_day(i32 %0) {
%2 = add i32 %0, -1
%3 = icmp ult i32 %2, 7
br i1 %3, label %4, label %8
4: ; preds = %1
%5 = sext i32 %2 to i64
%6 = shl i64 %5, 2
%7 = call i8* @llvm.load.relative.i64(i8* bitcast ([7 x i32]* @reltable.print_day to i8*), i64 %6)
br label %8
8: ; preds = %1, %4
%9 = phi i8* [ %7, %4 ], [ getelementptr inbounds ([20 x i8], [20 x i8]* @str.14, i64 0, i64 0), %1 ]
%10 = tail call i32 @puts(i8* dereferenceable(1) %9)
ret void
}