#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 */
scalar_t__ isprint(char);
int /*<<< orphan*/ putchar(char);
void safe_print(char *str, int len) {
  for (int i = 0; i < len; i++) {
    if (isprint(str[i]))
      putchar(str[i]);
    else
      putchar('?');
  }
}


x86 assembly (clang, -O0):
<safe_print>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
movl   $0x0,-0x10(%rbp)
mov    -0x10(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1190 <safe_print+0x70>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
movsbl (%rax,%rcx,1),%edi
call   1040 <isprint@plt>
cmp    $0x0,%rax
je     1173 <safe_print+0x53>
mov    -0x8(%rbp),%rax
movslq -0x10(%rbp),%rcx
movsbl (%rax,%rcx,1),%edi
call   1030 <putchar@plt>
jmp    117d <safe_print+0x5d>
mov    $0x3f,%edi
call   1030 <putchar@plt>
jmp    1182 <safe_print+0x62>
mov    -0x10(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x10(%rbp)
jmp    1136 <safe_print+0x16>
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<safe_print>:
push   %r15
push   %r14
push   %rbx
test   %esi,%esi
jle    1169 <safe_print+0x49>
mov    %rdi,%r15
mov    %esi,%r14d
xor    %ebx,%ebx
jmp    1156 <safe_print+0x36>
cs nopw 0x0(%rax,%rax,1)
nopl   (%rax)
movzbl (%r15,%rbx,1),%eax
movsbl %al,%edi
call   1030 <putchar@plt>
add    $0x1,%rbx
cmp    %rbx,%r14
je     1169 <safe_print+0x49>
movsbl (%r15,%rbx,1),%edi
call   1040 <isprint@plt>
test   %rax,%rax
jne    1140 <safe_print+0x20>
mov    $0x3f,%al
jmp    1145 <safe_print+0x25>
pop    %rbx
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
define void @safe_print(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca i32
store i8* %0, i8** %3
store i32 %1, i32* %4
store i32 0, i32* %5
br label %6
6: ; preds = %28, %2
%7 = load i32, i32* %5
%8 = load i32, i32* %4
%9 = icmp slt i32 %7, %8
br i1 %9, label %10, label %31
10: ; preds = %6
%11 = load i8*, i8** %3
%12 = load i32, i32* %5
%13 = sext i32 %12 to i64
%14 = getelementptr inbounds i8, i8* %11, i64 %13
%15 = load i8, i8* %14
%16 = call i64 @isprint(i8 signext %15)
%17 = icmp ne i64 %16, 0
br i1 %17, label %18, label %25
18: ; preds = %10
%19 = load i8*, i8** %3
%20 = load i32, i32* %5
%21 = sext i32 %20 to i64
%22 = getelementptr inbounds i8, i8* %19, i64 %21
%23 = load i8, i8* %22
%24 = call i32 @putchar(i8 signext %23)
br label %27
25: ; preds = %10
%26 = call i32 @putchar(i8 signext 63)
br label %27
27: ; preds = %25, %18
br label %28
28: ; preds = %27
%29 = load i32, i32* %5
%30 = add nsw i32 %29, 1
store i32 %30, i32* %5
br label %6
31: ; preds = %6
ret void
}

LLVM IR (-O2):
define void @safe_print(i8* nocapture %0, i32 %1) {
%3 = icmp sgt i32 %1, 0
br i1 %3, label %4, label %6
4: ; preds = %2
%5 = zext i32 %1 to i64
br label %7
6: ; preds = %15, %2
ret void
7: ; preds = %4, %15
%8 = phi i64 [ 0, %4 ], [ %18, %15 ]
%9 = getelementptr inbounds i8, i8* %0, i64 %8
%10 = load i8, i8* %9
%11 = tail call i64 @isprint(i8 signext %10)
%12 = icmp eq i64 %11, 0
br i1 %12, label %15, label %13
13: ; preds = %7
%14 = load i8, i8* %9
br label %15
15: ; preds = %7, %13
%16 = phi i8 [ %14, %13 ], [ 63, %7 ]
%17 = tail call i32 @putchar(i8 signext %16)
%18 = add nuw nsw i64 %8, 1
%19 = icmp eq i64 %18, %5
br i1 %19, label %6, label %7
}