#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 *, ...);
int callback(void *data, int argc, char **argv, char **azColName) {
  for (int i = 0; i < argc; i++) {
    printf("%s\n", argv[i] ? argv[i] : "NULL");
  }
  printf("\n");
  return 0;
}


x86 assembly (clang, -O0):
<callback>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
mov    %rdx,-0x18(%rbp)
mov    %rcx,-0x20(%rbp)
movl   $0x0,-0x24(%rbp)
mov    -0x24(%rbp),%eax
cmp    -0xc(%rbp),%eax
jge    1192 <callback+0x82>
mov    -0x18(%rbp),%rax
movslq -0x24(%rbp),%rcx
cmpq   $0x0,(%rax,%rcx,8)
je     1162 <callback+0x52>
mov    -0x18(%rbp),%rax
movslq -0x24(%rbp),%rcx
mov    (%rax,%rcx,8),%rax
mov    %rax,-0x30(%rbp)
jmp    1172 <callback+0x62>
lea    0xe9b(%rip),%rax
mov    %rax,-0x30(%rbp)
jmp    1172 <callback+0x62>
mov    -0x30(%rbp),%rsi
lea    0xe83(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x24(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x24(%rbp)
jmp    112e <callback+0x1e>
lea    0xe69(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<callback>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    1159 <callback+0x39>
mov    %rdx,%r14
mov    %esi,%r15d
xor    %ebx,%ebx
lea    0xec5(%rip),%r12
nopl   0x0(%rax,%rax,1)
mov    (%r14,%rbx,8),%rdi
test   %rdi,%rdi
cmove  %r12,%rdi
call   1040 <puts@plt>
add    $0x1,%rbx
cmp    %rbx,%r15
jne    1140 <callback+0x20>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

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

LLVM IR (-O2):
@.str.1 = [5 x i8] c"NULL\00"
define i32 @callback(i8* nocapture readnone %0, i32 %1, i8** nocapture %2, i8** nocapture readnone %3) {
%5 = icmp sgt i32 %1, 0
br i1 %5, label %6, label %8
6: ; preds = %4
%7 = zext i32 %1 to i64
br label %10
8: ; preds = %10, %4
%9 = tail call i32 @putchar(i32 10)
ret i32 0
10: ; preds = %6, %10
%11 = phi i64 [ 0, %6 ], [ %17, %10 ]
%12 = getelementptr inbounds i8*, i8** %2, i64 %11
%13 = load i8*, i8** %12
%14 = icmp eq i8* %13, null
%15 = select i1 %14, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8* %13
%16 = tail call i32 @puts(i8* dereferenceable(1) %15)
%17 = add nuw nsw i64 %11, 1
%18 = icmp eq i64 %17, %7
br i1 %18, label %8, label %10
}