#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 */
typedef int /*<<< orphan*/ time_t;
struct tm {
  int tm_year;
  int tm_mon;
  int tm_mday;
};

/* Variables and functions */
struct tm *localtime(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, char *, int, int, int);
void print_date(void *data, time_t now) {
  struct tm *lt = localtime(&now);
  printf("%s: %04d-%02d-%02d\n", (char *)data, lt->tm_year + 1900,
         lt->tm_mon + 1, lt->tm_mday);
}


x86 assembly (clang, -O0):
<print_date>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %esi,-0xc(%rbp)
lea    -0xc(%rbp),%rdi
call   1030 <localtime@plt>
mov    %rax,-0x18(%rbp)
mov    -0x8(%rbp),%rsi
mov    -0x18(%rbp),%rax
mov    (%rax),%edx
add    $0x76c,%edx
mov    -0x18(%rbp),%rax
mov    0x4(%rax),%ecx
add    $0x1,%ecx
mov    -0x18(%rbp),%rax
mov    0x8(%rax),%r8d
lea    0xe9b(%rip),%rdi
call   1040 <printf@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<print_date>:
push   %rbx
sub    $0x10,%rsp
mov    %rdi,%rbx
mov    %esi,0xc(%rsp)
lea    0xc(%rsp),%rdi
call   1030 <localtime@plt>
mov    $0x76c,%edx
add    (%rax),%edx
mov    0x4(%rax),%ecx
mov    0x8(%rax),%r8d
add    $0x1,%ecx
lea    0xeb2(%rip),%rdi
mov    %rbx,%rsi
call   1040 <printf@plt>
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
%struct.tm = type { i32, i32, i32 }
@.str = [20 x i8] c"%s: %04d-%02d-%02d\0A\00"
define void @print_date(i8* %0, i32 %1) {
%3 = alloca i8*
%4 = alloca i32
%5 = alloca %struct.tm*
store i8* %0, i8** %3
store i32 %1, i32* %4
%6 = call %struct.tm* @localtime(i32* %4)
store %struct.tm* %6, %struct.tm** %5
%7 = load i8*, i8** %3
%8 = load %struct.tm*, %struct.tm** %5
%9 = getelementptr inbounds %struct.tm, %struct.tm* %8, i32 0, i32 0
%10 = load i32, i32* %9
%11 = add nsw i32 %10, 1900
%12 = load %struct.tm*, %struct.tm** %5
%13 = getelementptr inbounds %struct.tm, %struct.tm* %12, i32 0, i32 1
%14 = load i32, i32* %13
%15 = add nsw i32 %14, 1
%16 = load %struct.tm*, %struct.tm** %5
%17 = getelementptr inbounds %struct.tm, %struct.tm* %16, i32 0, i32 2
%18 = load i32, i32* %17
%19 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* %7, i32 %11, i32 %15, i32 %18)
ret void
}

LLVM IR (-O2):
%struct.tm = type { i32, i32, i32 }
@.str = [20 x i8] c"%s: %04d-%02d-%02d\0A\00"
define void @print_date(i8* %0, i32 %1) {
%3 = alloca i32
store i32 %1, i32* %3
%4 = call %struct.tm* @localtime(i32* %3)
%5 = getelementptr inbounds %struct.tm, %struct.tm* %4, i64 0, i32 0
%6 = load i32, i32* %5
%7 = add nsw i32 %6, 1900
%8 = getelementptr inbounds %struct.tm, %struct.tm* %4, i64 0, i32 1
%9 = load i32, i32* %8
%10 = add nsw i32 %9, 1
%11 = getelementptr inbounds %struct.tm, %struct.tm* %4, i64 0, i32 2
%12 = load i32, i32* %11
%13 = call i32 @printf(i8* getelementptr inbounds ([20 x i8], [20 x i8]* @.str, i64 0, i64 0), i8* %0, i32 %7, i32 %10, i32 %12)
ret void
}