#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 */
#define N_BSS 130
#define N_DATA 129
#define N_TEXT 128
char *print_reloc_segment(int segnum) {
  char *r = "unknown segment";
  switch (segnum) {
  case N_TEXT:
    r = "N_TEXT";
    break;
  case N_DATA:
    r = "N_DATA";
    break;
  case N_BSS:
    r = "N_BSS";
    break;
  }
  return r;
}


x86 assembly (clang, -O0):
<print_reloc_segment>:
push   %rbp
mov    %rsp,%rbp
mov    %edi,-0x4(%rbp)
lea    0xef2(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x14(%rbp)
sub    $0x80,%eax
je     114e <print_reloc_segment+0x4e>
jmp    1128 <print_reloc_segment+0x28>
mov    -0x14(%rbp),%eax
sub    $0x81,%eax
je     115e <print_reloc_segment+0x5e>
jmp    113b <print_reloc_segment+0x3b>
mov    -0x14(%rbp),%eax
sub    $0x82,%eax
je     116e <print_reloc_segment+0x6e>
jmp    1179 <print_reloc_segment+0x79>
lea    0xebb(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1179 <print_reloc_segment+0x79>
lea    0xeb2(%rip),%rax
mov    %rax,-0x10(%rbp)
jmp    1179 <print_reloc_segment+0x79>
lea    0xea9(%rip),%rax
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_reloc_segment>:
add    $0xffffff80,%edi
cmp    $0x2,%edi
ja     111a <print_reloc_segment+0x1a>
movslq %edi,%rax
lea    0xf12(%rip),%rcx
movslq (%rcx,%rax,4),%rax
add    %rcx,%rax
ret
lea    0xedf(%rip),%rax
ret

LLVM IR (-O0):
@.str = [16 x i8] c"unknown segment\00"
@.str.1 = [7 x i8] c"N_TEXT\00"
@.str.2 = [7 x i8] c"N_DATA\00"
@.str.3 = [6 x i8] c"N_BSS\00"
define i8* @print_reloc_segment(i32 %0) {
%2 = alloca i32
%3 = alloca i8*
store i32 %0, i32* %2
store i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), i8** %3
%4 = load i32, i32* %2
switch i32 %4, label %8 [
i32 128, label %5
i32 129, label %6
i32 130, label %7
]
5: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.1, i64 0, i64 0), i8** %3
br label %8
6: ; preds = %1
store i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.2, i64 0, i64 0), i8** %3
br label %8
7: ; preds = %1
store i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.3, i64 0, i64 0), i8** %3
br label %8
8: ; preds = %1, %7, %6, %5
%9 = load i8*, i8** %3
ret i8* %9
}

LLVM IR (-O2):
@.str = [16 x i8] c"unknown segment\00"
@.str.1 = [7 x i8] c"N_TEXT\00"
@.str.2 = [7 x i8] c"N_DATA\00"
@.str.3 = [6 x i8] c"N_BSS\00"
@reltable.print_reloc_segment = [3 x i32] [i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.1 to i64), i64 ptrtoint ([3 x i32]* @reltable.print_reloc_segment to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([7 x i8]* @.str.2 to i64), i64 ptrtoint ([3 x i32]* @reltable.print_reloc_segment to i64)) to i32), i32 trunc (i64 sub (i64 ptrtoint ([6 x i8]* @.str.3 to i64), i64 ptrtoint ([3 x i32]* @reltable.print_reloc_segment to i64)) to i32)]
define i8* @print_reloc_segment(i32 %0) {
%2 = add i32 %0, -128
%3 = icmp ult i32 %2, 3
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 ([3 x i32]* @reltable.print_reloc_segment to i8*), i64 %6)
br label %8
8: ; preds = %4, %1
%9 = phi i8* [ getelementptr inbounds ([16 x i8], [16 x i8]* @.str, i64 0, i64 0), %1 ], [ %7, %4 ]
ret i8* %9
}