#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*/ fprintf(int /*<<< orphan*/, char *, char *);
int /*<<< orphan*/ free(char *);
char *my_add(char *, char *);
int /*<<< orphan*/ printf(char *, char *, char *, char *);
int /*<<< orphan*/ stderr;
int main(int argc, char **argv) {
  char *sum;
  char *p;
  if (argc != 3) {
    fprintf(stderr, "usage: %s [number] [number]\n", argv[0]);
    return 1;
  }
  p = sum = my_add(argv[1], argv[2]);
  while (*p == '0') {
    p++;
  }
  printf("%s + %s = %s\n", argv[1], argv[2], p);
  free(sum);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
cmpl   $0x3,-0x8(%rbp)
je     1188 <main+0x48>
mov    0x2e79(%rip),%rax
mov    (%rax),%edi
mov    -0x10(%rbp),%rax
mov    (%rax),%rdx
lea    0xe89(%rip),%rsi
call   1050 <fprintf@plt>
movl   $0x1,-0x4(%rbp)
jmp    11f6 <main+0xb6>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rdi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rsi
call   1060 <my_add@plt>
mov    %rax,-0x18(%rbp)
mov    %rax,-0x20(%rbp)
mov    -0x20(%rbp),%rax
movsbl (%rax),%eax
cmp    $0x30,%eax
jne    11c6 <main+0x86>
mov    -0x20(%rbp),%rax
add    $0x1,%rax
mov    %rax,-0x20(%rbp)
jmp    11a5 <main+0x65>
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rsi
mov    -0x10(%rbp),%rax
mov    0x10(%rax),%rdx
mov    -0x20(%rbp),%rcx
lea    0xe3c(%rip),%rdi
call   1040 <printf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <free@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
mov    %rsi,%rbx
cmp    $0x3,%edi
jne    119a <main+0x5a>
mov    0x8(%rbx),%rdi
mov    0x10(%rbx),%rsi
call   1060 <my_add@plt>
mov    %rax,%r14
mov    %rax,%rcx
add    $0xffffffffffffffff,%rcx
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
cmpb   $0x30,0x1(%rcx)
lea    0x1(%rcx),%rcx
je     1170 <main+0x30>
mov    0x8(%rbx),%rsi
mov    0x10(%rbx),%rdx
lea    0xe94(%rip),%rdi
call   1040 <printf@plt>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %eax,%eax
jmp    11b7 <main+0x77>
mov    0x2e3f(%rip),%rax
mov    (%rax),%edi
mov    (%rbx),%rdx
lea    0xe53(%rip),%rsi
call   1050 <fprintf@plt>
mov    $0x1,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@stderr = global i32 0
@.str = [29 x i8] c"usage: %s [number] [number]\0A\00"
@.str.1 = [14 x i8] c"%s + %s = %s\0A\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i8*
%7 = alloca i8*
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%8 = load i32, i32* %4
%9 = icmp ne i32 %8, 3
br i1 %9, label %10, label %16
10: ; preds = %2
%11 = load i32, i32* @stderr
%12 = load i8**, i8*** %5
%13 = getelementptr inbounds i8*, i8** %12, i64 0
%14 = load i8*, i8** %13
%15 = call i32 @fprintf(i32 %11, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0), i8* %14)
store i32 1, i32* %3
br label %43
16: ; preds = %2
%17 = load i8**, i8*** %5
%18 = getelementptr inbounds i8*, i8** %17, i64 1
%19 = load i8*, i8** %18
%20 = load i8**, i8*** %5
%21 = getelementptr inbounds i8*, i8** %20, i64 2
%22 = load i8*, i8** %21
%23 = call i8* @my_add(i8* %19, i8* %22)
store i8* %23, i8** %6
store i8* %23, i8** %7
br label %24
24: ; preds = %29, %16
%25 = load i8*, i8** %7
%26 = load i8, i8* %25
%27 = sext i8 %26 to i32
%28 = icmp eq i32 %27, 48
br i1 %28, label %29, label %32
29: ; preds = %24
%30 = load i8*, i8** %7
%31 = getelementptr inbounds i8, i8* %30, i32 1
store i8* %31, i8** %7
br label %24
32: ; preds = %24
%33 = load i8**, i8*** %5
%34 = getelementptr inbounds i8*, i8** %33, i64 1
%35 = load i8*, i8** %34
%36 = load i8**, i8*** %5
%37 = getelementptr inbounds i8*, i8** %36, i64 2
%38 = load i8*, i8** %37
%39 = load i8*, i8** %7
%40 = call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8* %35, i8* %38, i8* %39)
%41 = load i8*, i8** %6
%42 = call i32 @free(i8* %41)
store i32 0, i32* %3
br label %43
43: ; preds = %32, %10
%44 = load i32, i32* %3
ret i32 %44
}

LLVM IR (-O2):
@stderr = global i32 0
@.str = [29 x i8] c"usage: %s [number] [number]\0A\00"
@.str.1 = [14 x i8] c"%s + %s = %s\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 3
br i1 %3, label %8, label %4
4: ; preds = %2
%5 = load i32, i32* @stderr
%6 = load i8*, i8** %1
%7 = tail call i32 @fprintf(i32 %5, i8* getelementptr inbounds ([29 x i8], [29 x i8]* @.str, i64 0, i64 0), i8* %6)
br label %24
8: ; preds = %2
%9 = getelementptr inbounds i8*, i8** %1, i64 1
%10 = load i8*, i8** %9
%11 = getelementptr inbounds i8*, i8** %1, i64 2
%12 = load i8*, i8** %11
%13 = tail call i8* @my_add(i8* %10, i8* %12)
br label %14
14: ; preds = %14, %8
%15 = phi i8* [ %13, %8 ], [ %18, %14 ]
%16 = load i8, i8* %15
%17 = icmp eq i8 %16, 48
%18 = getelementptr inbounds i8, i8* %15, i64 1
br i1 %17, label %14, label %19
19: ; preds = %14
%20 = load i8*, i8** %9
%21 = load i8*, i8** %11
%22 = tail call i32 @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str.1, i64 0, i64 0), i8* %20, i8* %21, i8* %15)
%23 = tail call i32 @free(i8* %13)
br label %24
24: ; preds = %19, %4
%25 = phi i32 [ 1, %4 ], [ 0, %19 ]
ret i32 %25
}