#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 *, char const);
int strlen(char const *);
int main(int argc, const char *argv[]) {
  for (int i = 0; i < argc; i++) {
    for (int j = 0, n = strlen(argv[i]); j < n; j++) {
      printf("%c\n", argv[i][j]);
    }
  }
}


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)
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11b1 <main+0x91>
movl   $0x0,-0x18(%rbp)
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rdi
call   1030 <strlen@plt>
mov    %eax,-0x1c(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x1c(%rbp),%eax
jge    119e <main+0x7e>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
mov    (%rax,%rcx,8),%rax
movslq -0x18(%rbp),%rcx
lea    0xe79(%rip),%rdi
movsbl (%rax,%rcx,1),%esi
call   1040 <printf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    1164 <main+0x44>
jmp    11a3 <main+0x83>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    113d <main+0x1d>
mov    -0x4(%rbp),%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
test   %edi,%edi
jle    118b <main+0x6b>
mov    %rsi,%r12
mov    %edi,%r15d
xor    %r13d,%r13d
lea    0xec1(%rip),%r14
jmp    1159 <main+0x39>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
add    $0x1,%r13
cmp    %r15,%r13
je     118b <main+0x6b>
mov    (%r12,%r13,8),%rdi
call   1030 <strlen@plt>
test   %eax,%eax
jle    1150 <main+0x30>
mov    %eax,%ebx
xor    %ebp,%ebp
nopw   0x0(%rax,%rax,1)
mov    (%r12,%r13,8),%rax
movsbl (%rax,%rbp,1),%esi
mov    %r14,%rdi
call   1040 <printf@plt>
add    $0x1,%rbp
cmp    %rbp,%rbx
jne    1170 <main+0x50>
jmp    1150 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

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

LLVM IR (-O2):
@.str = [4 x i8] c"%c\0A\00"
define i32 @main(i32 %0, i8** nocapture %1) {
%3 = icmp sgt i32 %0, 0
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %0 to i64
br label %7
6: ; preds = %15, %2
ret i32 0
7: ; preds = %4, %15
%8 = phi i64 [ 0, %4 ], [ %16, %15 ]
%9 = getelementptr inbounds i8*, i8** %1, i64 %8
%10 = load i8*, i8** %9
%11 = tail call i32 @strlen(i8* %10)
%12 = icmp sgt i32 %11, 0
br i1 %12, label %13, label %15
13: ; preds = %7
%14 = zext i32 %11 to i64
br label %18
15: ; preds = %18, %7
%16 = add nuw nsw i64 %8, 1
%17 = icmp eq i64 %16, %5
br i1 %17, label %6, label %7
18: ; preds = %13, %18
%19 = phi i64 [ 0, %13 ], [ %24, %18 ]
%20 = load i8*, i8** %9
%21 = getelementptr inbounds i8, i8* %20, i64 %19
%22 = load i8, i8* %21
%23 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8 signext %22)
%24 = add nuw nsw i64 %19, 1
%25 = icmp eq i64 %24, %14
br i1 %25, label %15, label %18
}