#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 */
unsigned char *malloc(int);
int /*<<< orphan*/ printf(char *, ...);
int strlen(char *);
unsigned char *string_xor(unsigned char *word1, unsigned char *word2) {
  int word1_size = strlen((char *)word1);
  int word2_size = strlen((char *)word2);
  if (word1_size == word2_size) {
    unsigned char *final_string = malloc(word1_size * sizeof(char));
    for (int i = 0; i < word1_size; i++) {
      if (word1[i] != word2[i]) {
        final_string[i] = '1';
      } else {
        final_string[i] = '0';
      }
    }
    return final_string;
  } else {
    printf("Erro on string_xor. Strings of different sizes!\n");
    printf("Word1 size: %d\n", word1_size);
    printf("Word2 size: %d\n", word2_size);
    printf("Word1: %s\n", word1);
    printf("Word2: %s\n", word2);
    return NULL;
  }
}


x86 assembly (clang, -O0):
<string_xor>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x18(%rbp),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x20(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x20(%rbp),%eax
jne    11e7 <string_xor+0xb7>
movslq -0x1c(%rbp),%rax
shl    $0x0,%rax
mov    %eax,%edi
call   1050 <malloc@plt>
mov    %rax,-0x28(%rbp)
movl   $0x0,-0x2c(%rbp)
mov    -0x2c(%rbp),%eax
cmp    -0x1c(%rbp),%eax
jge    11da <string_xor+0xaa>
mov    -0x10(%rbp),%rax
movslq -0x2c(%rbp),%rcx
movzbl (%rax,%rcx,1),%eax
mov    -0x18(%rbp),%rcx
movslq -0x2c(%rbp),%rdx
movzbl (%rcx,%rdx,1),%ecx
cmp    %ecx,%eax
je     11bb <string_xor+0x8b>
mov    -0x28(%rbp),%rax
movslq -0x2c(%rbp),%rcx
movb   $0x31,(%rax,%rcx,1)
jmp    11c7 <string_xor+0x97>
mov    -0x28(%rbp),%rax
movslq -0x2c(%rbp),%rcx
movb   $0x30,(%rax,%rcx,1)
jmp    11cc <string_xor+0x9c>
mov    -0x2c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x2c(%rbp)
jmp    117e <string_xor+0x4e>
mov    -0x28(%rbp),%rax
mov    %rax,-0x8(%rbp)
jmp    1243 <string_xor+0x113>
lea    0xe12(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x1c(%rbp),%esi
lea    0xe32(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x20(%rbp),%esi
lea    0xe31(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x10(%rbp),%rsi
lea    0xe2f(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    -0x18(%rbp),%rsi
lea    0xe28(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
movq   $0x0,-0x8(%rbp)
mov    -0x8(%rbp),%rax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<string_xor>:
push   %rbp
push   %r15
push   %r14
push   %r12
push   %rbx
mov    %rsi,%r14
mov    %rdi,%rbx
call   1040 <strlen@plt>
mov    %eax,%ebp
mov    %r14,%rdi
call   1040 <strlen@plt>
cmp    %eax,%ebp
jne    1181 <string_xor+0x41>
mov    %ebp,%edi
call   1060 <malloc@plt>
mov    %rax,%r15
test   %ebp,%ebp
jle    134b <string_xor+0x20b>
mov    %ebp,%eax
cmp    $0x8,%ebp
jae    11db <string_xor+0x9b>
xor    %ecx,%ecx
jmp    1330 <string_xor+0x1f0>
mov    %eax,%r12d
lea    0xecb(%rip),%rdi
call   1030 <puts@plt>
lea    0xe89(%rip),%rdi
xor    %r15d,%r15d
mov    %ebp,%esi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe86(%rip),%rdi
mov    %r12d,%esi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe85(%rip),%rdi
mov    %rbx,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe7f(%rip),%rdi
mov    %r14,%rsi
xor    %eax,%eax
call   1050 <printf@plt>
jmp    134b <string_xor+0x20b>
cmp    $0x20,%ebp
jae    11e7 <string_xor+0xa7>
xor    %ecx,%ecx
jmp    12e3 <string_xor+0x1a3>
mov    %eax,%ecx
and    $0xffffffe0,%ecx
lea    -0x20(%rcx),%rdx
mov    %rdx,%rsi
shr    $0x5,%rsi
add    $0x1,%rsi
test   %rdx,%rdx
je     1357 <string_xor+0x217>
mov    %rsi,%rdi
and    $0xfffffffffffffffe,%rdi
xor    %edx,%edx
movdqa 0xdeb(%rip),%xmm0
cs nopw 0x0(%rax,%rax,1)
nop
movdqu (%rbx,%rdx,1),%xmm1
movdqu 0x10(%rbx,%rdx,1),%xmm2
movdqu (%r14,%rdx,1),%xmm3
pcmpeqb %xmm1,%xmm3
movdqu 0x10(%r14,%rdx,1),%xmm1
pcmpeqb %xmm2,%xmm1
paddb  %xmm0,%xmm3
paddb  %xmm0,%xmm1
movdqu %xmm3,(%r15,%rdx,1)
movdqu %xmm1,0x10(%r15,%rdx,1)
movdqu 0x20(%rbx,%rdx,1),%xmm1
movdqu 0x30(%rbx,%rdx,1),%xmm2
movdqu 0x20(%r14,%rdx,1),%xmm3
pcmpeqb %xmm1,%xmm3
movdqu 0x30(%r14,%rdx,1),%xmm1
pcmpeqb %xmm2,%xmm1
paddb  %xmm0,%xmm3
paddb  %xmm0,%xmm1
movdqu %xmm3,0x20(%r15,%rdx,1)
movdqu %xmm1,0x30(%r15,%rdx,1)
add    $0x40,%rdx
add    $0xfffffffffffffffe,%rdi
jne    1220 <string_xor+0xe0>
test   $0x1,%sil
je     12da <string_xor+0x19a>
movdqu (%rbx,%rdx,1),%xmm0
movdqu 0x10(%rbx,%rdx,1),%xmm1
movdqu (%r14,%rdx,1),%xmm2
pcmpeqb %xmm0,%xmm2
movdqu 0x10(%r14,%rdx,1),%xmm0
pcmpeqb %xmm1,%xmm0
movdqa 0xd3b(%rip),%xmm1
paddb  %xmm1,%xmm2
paddb  %xmm1,%xmm0
movdqu %xmm2,(%r15,%rdx,1)
movdqu %xmm0,0x10(%r15,%rdx,1)
cmp    %rax,%rcx
je     134b <string_xor+0x20b>
test   $0x18,%al
je     1330 <string_xor+0x1f0>
mov    %rcx,%rdx
mov    %eax,%ecx
and    $0xfffffff8,%ecx
movdqa 0xd1d(%rip),%xmm0
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
movq   (%rbx,%rdx,1),%xmm1
movq   (%r14,%rdx,1),%xmm2
pcmpeqb %xmm1,%xmm2
paddb  %xmm0,%xmm2
movq   %xmm2,(%r15,%rdx,1)
add    $0x8,%rdx
cmp    %rdx,%rcx
jne    1300 <string_xor+0x1c0>
cmp    %rax,%rcx
je     134b <string_xor+0x20b>
nopw   0x0(%rax,%rax,1)
movzbl (%rbx,%rcx,1),%edx
cmp    (%r14,%rcx,1),%dl
sete   %dl
xor    $0x31,%dl
mov    %dl,(%r15,%rcx,1)
add    $0x1,%rcx
cmp    %rcx,%rax
jne    1330 <string_xor+0x1f0>
mov    %r15,%rax
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
pop    %rbp
ret
xor    %edx,%edx
test   $0x1,%sil
jne    129d <string_xor+0x15d>
jmp    12da <string_xor+0x19a>

LLVM IR (-O0):
@.str = [49 x i8] c"Erro on string_xor. Strings of different sizes!\0A\00"
@.str.1 = [16 x i8] c"Word1 size: %d\0A\00"
@.str.2 = [16 x i8] c"Word2 size: %d\0A\00"
@.str.3 = [11 x i8] c"Word1: %s\0A\00"
@.str.4 = [11 x i8] c"Word2: %s\0A\00"
define i8* @string_xor(i8* %0, i8* %1) {
%3 = alloca i8*
%4 = alloca i8*
%5 = alloca i8*
%6 = alloca i32
%7 = alloca i32
%8 = alloca i8*
%9 = alloca i32
store i8* %0, i8** %4
store i8* %1, i8** %5
%10 = load i8*, i8** %4
%11 = call i32 @strlen(i8* %10)
store i32 %11, i32* %6
%12 = load i8*, i8** %5
%13 = call i32 @strlen(i8* %12)
store i32 %13, i32* %7
%14 = load i32, i32* %6
%15 = load i32, i32* %7
%16 = icmp eq i32 %14, %15
br i1 %16, label %17, label %57
17: ; preds = %2
%18 = load i32, i32* %6
%19 = sext i32 %18 to i64
%20 = mul i64 %19, 1
%21 = trunc i64 %20 to i32
%22 = call i8* @malloc(i32 %21)
store i8* %22, i8** %8
store i32 0, i32* %9
br label %23
23: ; preds = %52, %17
%24 = load i32, i32* %9
%25 = load i32, i32* %6
%26 = icmp slt i32 %24, %25
br i1 %26, label %27, label %55
27: ; preds = %23
%28 = load i8*, i8** %4
%29 = load i32, i32* %9
%30 = sext i32 %29 to i64
%31 = getelementptr inbounds i8, i8* %28, i64 %30
%32 = load i8, i8* %31
%33 = zext i8 %32 to i32
%34 = load i8*, i8** %5
%35 = load i32, i32* %9
%36 = sext i32 %35 to i64
%37 = getelementptr inbounds i8, i8* %34, i64 %36
%38 = load i8, i8* %37
%39 = zext i8 %38 to i32
%40 = icmp ne i32 %33, %39
br i1 %40, label %41, label %46
41: ; preds = %27
%42 = load i8*, i8** %8
%43 = load i32, i32* %9
%44 = sext i32 %43 to i64
%45 = getelementptr inbounds i8, i8* %42, i64 %44
store i8 49, i8* %45
br label %51
46: ; preds = %27
%47 = load i8*, i8** %8
%48 = load i32, i32* %9
%49 = sext i32 %48 to i64
%50 = getelementptr inbounds i8, i8* %47, i64 %49
store i8 48, i8* %50
br label %51
51: ; preds = %46, %41
br label %52
52: ; preds = %51
%53 = load i32, i32* %9
%54 = add nsw i32 %53, 1
store i32 %54, i32* %9
br label %23
55: ; preds = %23
%56 = load i8*, i8** %8
store i8* %56, i8** %3
br label %67
57: ; preds = %2
%58 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([49 x i8], [49 x i8]* @.str, i64 0, i64 0))
%59 = load i32, i32* %6
%60 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %59)
%61 = load i32, i32* %7
%62 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i32 %61)
%63 = load i8*, i8** %4
%64 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* %63)
%65 = load i8*, i8** %5
%66 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i8* %65)
store i8* null, i8** %3
br label %67
67: ; preds = %57, %55
%68 = load i8*, i8** %3
ret i8* %68
}

LLVM IR (-O2):
@.str.1 = [16 x i8] c"Word1 size: %d\0A\00"
@.str.2 = [16 x i8] c"Word2 size: %d\0A\00"
@.str.3 = [11 x i8] c"Word1: %s\0A\00"
@.str.4 = [11 x i8] c"Word2: %s\0A\00"
@str = [48 x i8] c"Erro on string_xor. Strings of different sizes!\00"
define noalias i8* @string_xor(i8* %0, i8* %1) {
%3 = tail call i32 @strlen(i8* %0)
%4 = tail call i32 @strlen(i8* %1)
%5 = icmp eq i32 %3, %4
br i1 %5, label %6, label %131
6: ; preds = %2
%7 = tail call i8* @malloc(i32 %3)
%8 = icmp sgt i32 %3, 0
br i1 %8, label %9, label %137
9: ; preds = %6
%10 = zext i32 %3 to i64
%11 = icmp ult i32 %3, 8
br i1 %11, label %118, label %12
12: ; preds = %9
%13 = icmp ult i32 %3, 32
br i1 %13, label %99, label %14
14: ; preds = %12
%15 = and i64 %10, 4294967264
%16 = add nsw i64 %15, -32
%17 = lshr exact i64 %16, 5
%18 = add nuw nsw i64 %17, 1
%19 = and i64 %18, 1
%20 = icmp eq i64 %16, 0
br i1 %20, label %70, label %21
21: ; preds = %14
%22 = and i64 %18, 1152921504606846974
br label %23
23: ; preds = %23, %21
%24 = phi i64 [ 0, %21 ], [ %67, %23 ]
%25 = phi i64 [ 0, %21 ], [ %68, %23 ]
%26 = getelementptr inbounds i8, i8* %0, i64 %24
%27 = bitcast i8* %26 to <16 x i8>*
%28 = load <16 x i8>, <16 x i8>* %27
%29 = getelementptr inbounds i8, i8* %26, i64 16
%30 = bitcast i8* %29 to <16 x i8>*
%31 = load <16 x i8>, <16 x i8>* %30
%32 = getelementptr inbounds i8, i8* %1, i64 %24
%33 = bitcast i8* %32 to <16 x i8>*
%34 = load <16 x i8>, <16 x i8>* %33
%35 = getelementptr inbounds i8, i8* %32, i64 16
%36 = bitcast i8* %35 to <16 x i8>*
%37 = load <16 x i8>, <16 x i8>* %36
%38 = icmp eq <16 x i8> %28, %34
%39 = icmp eq <16 x i8> %31, %37
%40 = select <16 x i1> %38, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%41 = select <16 x i1> %39, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%42 = getelementptr inbounds i8, i8* %7, i64 %24
%43 = bitcast i8* %42 to <16 x i8>*
store <16 x i8> %40, <16 x i8>* %43
%44 = getelementptr inbounds i8, i8* %42, i64 16
%45 = bitcast i8* %44 to <16 x i8>*
store <16 x i8> %41, <16 x i8>* %45
%46 = or i64 %24, 32
%47 = getelementptr inbounds i8, i8* %0, i64 %46
%48 = bitcast i8* %47 to <16 x i8>*
%49 = load <16 x i8>, <16 x i8>* %48
%50 = getelementptr inbounds i8, i8* %47, i64 16
%51 = bitcast i8* %50 to <16 x i8>*
%52 = load <16 x i8>, <16 x i8>* %51
%53 = getelementptr inbounds i8, i8* %1, i64 %46
%54 = bitcast i8* %53 to <16 x i8>*
%55 = load <16 x i8>, <16 x i8>* %54
%56 = getelementptr inbounds i8, i8* %53, i64 16
%57 = bitcast i8* %56 to <16 x i8>*
%58 = load <16 x i8>, <16 x i8>* %57
%59 = icmp eq <16 x i8> %49, %55
%60 = icmp eq <16 x i8> %52, %58
%61 = select <16 x i1> %59, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%62 = select <16 x i1> %60, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%63 = getelementptr inbounds i8, i8* %7, i64 %46
%64 = bitcast i8* %63 to <16 x i8>*
store <16 x i8> %61, <16 x i8>* %64
%65 = getelementptr inbounds i8, i8* %63, i64 16
%66 = bitcast i8* %65 to <16 x i8>*
store <16 x i8> %62, <16 x i8>* %66
%67 = add nuw i64 %24, 64
%68 = add i64 %25, 2
%69 = icmp eq i64 %68, %22
br i1 %69, label %70, label %23
70: ; preds = %23, %14
%71 = phi i64 [ 0, %14 ], [ %67, %23 ]
%72 = icmp eq i64 %19, 0
br i1 %72, label %94, label %73
73: ; preds = %70
%74 = getelementptr inbounds i8, i8* %0, i64 %71
%75 = bitcast i8* %74 to <16 x i8>*
%76 = load <16 x i8>, <16 x i8>* %75
%77 = getelementptr inbounds i8, i8* %74, i64 16
%78 = bitcast i8* %77 to <16 x i8>*
%79 = load <16 x i8>, <16 x i8>* %78
%80 = getelementptr inbounds i8, i8* %1, i64 %71
%81 = bitcast i8* %80 to <16 x i8>*
%82 = load <16 x i8>, <16 x i8>* %81
%83 = getelementptr inbounds i8, i8* %80, i64 16
%84 = bitcast i8* %83 to <16 x i8>*
%85 = load <16 x i8>, <16 x i8>* %84
%86 = icmp eq <16 x i8> %76, %82
%87 = icmp eq <16 x i8> %79, %85
%88 = select <16 x i1> %86, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%89 = select <16 x i1> %87, <16 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <16 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%90 = getelementptr inbounds i8, i8* %7, i64 %71
%91 = bitcast i8* %90 to <16 x i8>*
store <16 x i8> %88, <16 x i8>* %91
%92 = getelementptr inbounds i8, i8* %90, i64 16
%93 = bitcast i8* %92 to <16 x i8>*
store <16 x i8> %89, <16 x i8>* %93
br label %94
94: ; preds = %70, %73
%95 = icmp eq i64 %15, %10
br i1 %95, label %137, label %96
96: ; preds = %94
%97 = and i64 %10, 24
%98 = icmp eq i64 %97, 0
br i1 %98, label %118, label %99
99: ; preds = %12, %96
%100 = phi i64 [ %15, %96 ], [ 0, %12 ]
%101 = and i64 %10, 4294967288
br label %102
102: ; preds = %102, %99
%103 = phi i64 [ %100, %99 ], [ %114, %102 ]
%104 = getelementptr inbounds i8, i8* %0, i64 %103
%105 = bitcast i8* %104 to <8 x i8>*
%106 = load <8 x i8>, <8 x i8>* %105
%107 = getelementptr inbounds i8, i8* %1, i64 %103
%108 = bitcast i8* %107 to <8 x i8>*
%109 = load <8 x i8>, <8 x i8>* %108
%110 = icmp eq <8 x i8> %106, %109
%111 = select <8 x i1> %110, <8 x i8> <i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48, i8 48>, <8 x i8> <i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49, i8 49>
%112 = getelementptr inbounds i8, i8* %7, i64 %103
%113 = bitcast i8* %112 to <8 x i8>*
store <8 x i8> %111, <8 x i8>* %113
%114 = add nuw i64 %103, 8
%115 = icmp eq i64 %114, %101
br i1 %115, label %116, label %102
116: ; preds = %102
%117 = icmp eq i64 %101, %10
br i1 %117, label %137, label %118
118: ; preds = %9, %96, %116
%119 = phi i64 [ 0, %9 ], [ %15, %96 ], [ %101, %116 ]
br label %120
120: ; preds = %118, %120
%121 = phi i64 [ %129, %120 ], [ %119, %118 ]
%122 = getelementptr inbounds i8, i8* %0, i64 %121
%123 = load i8, i8* %122
%124 = getelementptr inbounds i8, i8* %1, i64 %121
%125 = load i8, i8* %124
%126 = icmp eq i8 %123, %125
%127 = select i1 %126, i8 48, i8 49
%128 = getelementptr inbounds i8, i8* %7, i64 %121
store i8 %127, i8* %128
%129 = add nuw nsw i64 %121, 1
%130 = icmp eq i64 %129, %10
br i1 %130, label %137, label %120
131: ; preds = %2
%132 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([48 x i8], [48 x i8]* @str, i64 0, i64 0))
%133 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %3)
%134 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0), i32 %4)
%135 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* %0)
%136 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([11 x i8], [11 x i8]* @.str.4, i64 0, i64 0), i8* %1)
br label %137
137: ; preds = %120, %94, %116, %6, %131
%138 = phi i8* [ null, %131 ], [ %7, %6 ], [ %7, %116 ], [ %7, %94 ], [ %7, %120 ]
ret i8* %138
}