#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 EXIT_SUCCESS;
char *getenv(char *);
int /*<<< orphan*/ printf(char *, ...);
int main() {
  printf("The current user name is\n");
  printf("%s\n", getenv("USER"));
  printf("The current user directory is\n");
  printf("%s\n", getenv("PWD"));
  return EXIT_SUCCESS;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xeca(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xeda(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,%rsi
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xec2(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
lea    0xed3(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,%rsi
lea    0xe9c(%rip),%rdi
mov    $0x0,%al
call   1040 <printf@plt>
mov    0x2e54(%rip),%rax
mov    (%rax),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xee1(%rip),%rdi
call   1040 <puts@plt>
lea    0xecc(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,%rdi
call   1040 <puts@plt>
lea    0xeda(%rip),%rdi
call   1040 <puts@plt>
lea    0xeb1(%rip),%rdi
call   1030 <getenv@plt>
mov    %rax,%rdi
call   1040 <puts@plt>
mov    0x2e78(%rip),%rax
mov    (%rax),%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [26 x i8] c"The current user name is\0A\00"
@.str.1 = [4 x i8] c"%s\0A\00"
@.str.2 = [5 x i8] c"USER\00"
@.str.3 = [31 x i8] c"The current user directory is\0A\00"
@.str.4 = [4 x i8] c"PWD\00"
@EXIT_SUCCESS = global i32 0
define i32 @main() {
%1 = alloca i32
store i32 0, i32* %1
%2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0))
%3 = call i8* @getenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%4 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %3)
%5 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([31 x i8], [31 x i8]* @.str.3, i64 0, i64 0))
%6 = call i8* @getenv(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i8* %6)
%8 = load i32, i32* @EXIT_SUCCESS
ret i32 %8
}

LLVM IR (-O2):
@.str.2 = [5 x i8] c"USER\00"
@.str.4 = [4 x i8] c"PWD\00"
@EXIT_SUCCESS = global i32 0
@str = [25 x i8] c"The current user name is\00"
@str.5 = [30 x i8] c"The current user directory is\00"
define i32 @main() {
%1 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([25 x i8], [25 x i8]* @str, i64 0, i64 0))
%2 = tail call i8* @getenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%3 = tail call i32 @puts(i8* dereferenceable(1) %2)
%4 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([30 x i8], [30 x i8]* @str.5, i64 0, i64 0))
%5 = tail call i8* @getenv(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.4, i64 0, i64 0))
%6 = tail call i32 @puts(i8* dereferenceable(1) %5)
%7 = load i32, i32* @EXIT_SUCCESS
ret i32 %7
}