#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_hour;
};

/* Variables and functions */
struct tm *gmtime(int /*<<< orphan*/ *);
struct tm *localtime(int /*<<< orphan*/ *);
int /*<<< orphan*/ printf(char *, int);
int /*<<< orphan*/ time(int /*<<< orphan*/ *);
int main(void) {
  struct tm *local;
  time_t t;
  t = time(NULL);
  local = localtime(&t);
  printf("Local hour is: %d\n", local->tm_hour);
  local = gmtime(&t);
  printf("UTC hour is: %d\n", local->tm_hour);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
xor    %eax,%eax
mov    %eax,%edi
call   1050 <time@plt>
mov    %eax,-0x14(%rbp)
lea    -0x14(%rbp),%rdi
call   1030 <localtime@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%esi
lea    0xe8b(%rip),%rdi
call   1040 <printf@plt>
lea    -0x14(%rbp),%rdi
call   1060 <gmtime@plt>
mov    %rax,-0x10(%rbp)
mov    -0x10(%rbp),%rax
mov    (%rax),%esi
lea    0xe7f(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
sub    $0x10,%rsp
xor    %edi,%edi
call   1050 <time@plt>
mov    %eax,0xc(%rsp)
lea    0xc(%rsp),%rbx
mov    %rbx,%rdi
call   1030 <localtime@plt>
mov    (%rax),%esi
lea    0xe9a(%rip),%rdi
call   1040 <printf@plt>
mov    %rbx,%rdi
call   1060 <gmtime@plt>
mov    (%rax),%esi
lea    0xe97(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
%struct.tm = type { i32 }
@.str = [19 x i8] c"Local hour is: %d\0A\00"
@.str.1 = [17 x i8] c"UTC hour is: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca %struct.tm*
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 @time(i32* null)
store i32 %4, i32* %3
%5 = call %struct.tm* @localtime(i32* %3)
store %struct.tm* %5, %struct.tm** %2
%6 = load %struct.tm*, %struct.tm** %2
%7 = getelementptr inbounds %struct.tm, %struct.tm* %6, i32 0, i32 0
%8 = load i32, i32* %7
%9 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i32 %8)
%10 = call %struct.tm* @gmtime(i32* %3)
store %struct.tm* %10, %struct.tm** %2
%11 = load %struct.tm*, %struct.tm** %2
%12 = getelementptr inbounds %struct.tm, %struct.tm* %11, i32 0, i32 0
%13 = load i32, i32* %12
%14 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %13)
ret i32 0
}

LLVM IR (-O2):
%struct.tm = type { i32 }
@.str = [19 x i8] c"Local hour is: %d\0A\00"
@.str.1 = [17 x i8] c"UTC hour is: %d\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = bitcast i32* %1 to i8*
%3 = tail call i32 @time(i32* null)
store i32 %3, i32* %1
%4 = call %struct.tm* @localtime(i32* %1)
%5 = getelementptr inbounds %struct.tm, %struct.tm* %4, i64 0, i32 0
%6 = load i32, i32* %5
%7 = call i32 @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str, i64 0, i64 0), i32 %6)
%8 = call %struct.tm* @gmtime(i32* %1)
%9 = getelementptr inbounds %struct.tm, %struct.tm* %8, i64 0, i32 0
%10 = load i32, i32* %9
%11 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %10)
ret i32 0
}