#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 EXIT_SUCCESS;
int /*<<< orphan*/ printf(char *, int);
int main(int argc, char **argv) {
  if (argc == 2) {
    int count = 0;
    while (argv[1][count] != '\0')
      count++;
    printf("%i\n", count);
  }
  return (EXIT_SUCCESS);
}


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   $0x2,-0x8(%rbp)
jne    116d <main+0x5d>
movl   $0x0,-0x14(%rbp)
mov    -0x10(%rbp),%rax
mov    0x8(%rax),%rax
movslq -0x14(%rbp),%rcx
movsbl (%rax,%rcx,1),%eax
cmp    $0x0,%eax
je     115e <main+0x4e>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1137 <main+0x27>
mov    -0x14(%rbp),%esi
lea    0xe98(%rip),%rdi
call   1030 <printf@plt>
mov    0x2e6c(%rip),%rax
mov    (%rax),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
cmp    $0x2,%edi
jne    1138 <main+0x28>
mov    0x8(%rsi),%rax
mov    $0xffffffff,%esi
nop
add    $0x1,%esi
cmpb   $0x0,(%rax)
lea    0x1(%rax),%rax
jne    1120 <main+0x10>
lea    0xecd(%rip),%rdi
call   1030 <printf@plt>
mov    0x2ea1(%rip),%rax
mov    (%rax),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%i\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
%6 = alloca i32
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%7 = load i32, i32* %4
%8 = icmp eq i32 %7, 2
br i1 %8, label %9, label %26
9: ; preds = %2
store i32 0, i32* %6
br label %10
10: ; preds = %20, %9
%11 = load i8**, i8*** %5
%12 = getelementptr inbounds i8*, i8** %11, i64 1
%13 = load i8*, i8** %12
%14 = load i32, i32* %6
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds i8, i8* %13, i64 %15
%17 = load i8, i8* %16
%18 = sext i8 %17 to i32
%19 = icmp ne i32 %18, 0
br i1 %19, label %20, label %23
20: ; preds = %10
%21 = load i32, i32* %6
%22 = add nsw i32 %21, 1
store i32 %22, i32* %6
br label %10
23: ; preds = %10
%24 = load i32, i32* %6
%25 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %24)
br label %26
26: ; preds = %23, %2
%27 = load i32, i32* @EXIT_SUCCESS
ret i32 %27
}

LLVM IR (-O2):
@.str = [4 x i8] c"%i\0A\00"
@EXIT_SUCCESS = global i32 0
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp eq i32 %0, 2
br i1 %3, label %4, label %16
4: ; preds = %2
%5 = getelementptr inbounds i8*, i8** %1, i64 1
%6 = load i8*, i8** %5
br label %7
7: ; preds = %7, %4
%8 = phi i64 [ %12, %7 ], [ 0, %4 ]
%9 = getelementptr inbounds i8, i8* %6, i64 %8
%10 = load i8, i8* %9
%11 = icmp eq i8 %10, 0
%12 = add nuw i64 %8, 1
br i1 %11, label %13, label %7
13: ; preds = %7
%14 = trunc i64 %8 to i32
%15 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i32 %14)
br label %16
16: ; preds = %13, %2
%17 = load i32, i32* @EXIT_SUCCESS
ret i32 %17
}