#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*/ initbootenv();
int /*<<< orphan*/ testgetenv(char *);
int /*<<< orphan*/ testprintenv();
int /*<<< orphan*/ testsetenv(char *, char *);
int /*<<< orphan*/ testunsetenv(char *);
int main(int argc, char **argv) {
  initbootenv();
  testprintenv();
  testgetenv("systype");
  testgetenv("crap");
  testsetenv("crap", "50");
  testsetenv("haltaction", "cheese");
  testunsetenv("console");
  testunsetenv("crap2");
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
mov    %edi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    $0x0,%al
call   1030 <initbootenv@plt>
mov    $0x0,%al
call   1060 <testprintenv@plt>
lea    0xe85(%rip),%rdi
call   1050 <testgetenv@plt>
lea    0xe81(%rip),%rdi
call   1050 <testgetenv@plt>
lea    0xe75(%rip),%rdi
lea    0xe73(%rip),%rsi
call   1040 <testsetenv@plt>
lea    0xe6a(%rip),%rdi
lea    0xe6e(%rip),%rsi
call   1040 <testsetenv@plt>
lea    0xe69(%rip),%rdi
call   1070 <testunsetenv@plt>
lea    0xe65(%rip),%rdi
call   1070 <testunsetenv@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
xor    %eax,%eax
call   1030 <initbootenv@plt>
xor    %eax,%eax
call   1060 <testprintenv@plt>
lea    0xe9a(%rip),%rdi
call   1050 <testgetenv@plt>
lea    0xe96(%rip),%rbx
mov    %rbx,%rdi
call   1050 <testgetenv@plt>
lea    0xe8c(%rip),%rsi
mov    %rbx,%rdi
call   1040 <testsetenv@plt>
lea    0xe80(%rip),%rdi
lea    0xe84(%rip),%rsi
call   1040 <testsetenv@plt>
lea    0xe7f(%rip),%rdi
call   1070 <testunsetenv@plt>
lea    0xe7b(%rip),%rdi
call   1070 <testunsetenv@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [8 x i8] c"systype\00"
@.str.1 = [5 x i8] c"crap\00"
@.str.2 = [3 x i8] c"50\00"
@.str.3 = [11 x i8] c"haltaction\00"
@.str.4 = [7 x i8] c"cheese\00"
@.str.5 = [8 x i8] c"console\00"
@.str.6 = [6 x i8] c"crap2\00"
define i32 @main(i32 %0, i8** %1) {
%3 = alloca i32
%4 = alloca i32
%5 = alloca i8**
store i32 0, i32* %3
store i32 %0, i32* %4
store i8** %1, i8*** %5
%6 = call i32 (...) @initbootenv()
%7 = call i32 (...) @testprintenv()
%8 = call i32 @testgetenv(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%9 = call i32 @testgetenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%10 = call i32 @testsetenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%11 = call i32 @testsetenv(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
%12 = call i32 @testunsetenv(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0))
%13 = call i32 @testunsetenv(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
ret i32 0
}

LLVM IR (-O2):
@.str = [8 x i8] c"systype\00"
@.str.1 = [5 x i8] c"crap\00"
@.str.2 = [3 x i8] c"50\00"
@.str.3 = [11 x i8] c"haltaction\00"
@.str.4 = [7 x i8] c"cheese\00"
@.str.5 = [8 x i8] c"console\00"
@.str.6 = [6 x i8] c"crap2\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 (...) @initbootenv()
%4 = tail call i32 (...) @testprintenv()
%5 = tail call i32 @testgetenv(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0))
%6 = tail call i32 @testgetenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0))
%7 = tail call i32 @testsetenv(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.1, i64 0, i64 0), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.2, i64 0, i64 0))
%8 = tail call i32 @testsetenv(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.4, i64 0, i64 0))
%9 = tail call i32 @testunsetenv(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.5, i64 0, i64 0))
%10 = tail call i32 @testunsetenv(i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.6, i64 0, i64 0))
ret i32 0
}