#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 ncolumns, char **columncomntents,
             char **columnames) {
  for (int i = 0; i < ncolumns; ++i) {
    if (i != 0) {
      printf(", ");
    }
    printf("%s: %s", columnames[i], columncomntents[i]);
  }
  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    1186 <callback+0x76>
cmpl   $0x0,-0x24(%rbp)
je     1152 <callback+0x42>
lea    0xeb5(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
mov    -0x20(%rbp),%rax
movslq -0x24(%rbp),%rcx
mov    (%rax,%rcx,8),%rsi
mov    -0x18(%rbp),%rax
movslq -0x24(%rbp),%rcx
mov    (%rax,%rcx,8),%rdx
lea    0xe92(%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    0xe7d(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<callback>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
push   %rax
test   %esi,%esi
jle    1196 <callback+0x76>
mov    %rcx,%r14
mov    %rdx,%r13
mov    %esi,%ebp
mov    (%rcx),%rsi
mov    (%rdx),%rdx
lea    0xebf(%rip),%rdi
xor    %eax,%eax
call   1040 <printf@plt>
cmp    $0x1,%ebp
je     1196 <callback+0x76>
mov    %ebp,%ebp
mov    $0x1,%ebx
lea    0xea2(%rip),%r15
lea    0xe9e(%rip),%r12
cs nopw 0x0(%rax,%rax,1)
nop
mov    %r15,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
mov    (%r14,%rbx,8),%rsi
mov    0x0(%r13,%rbx,8),%rdx
mov    %r12,%rdi
xor    %eax,%eax
call   1040 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%rbp
jne    1170 <callback+0x50>
mov    $0xa,%edi
call   1030 <putchar@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

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