#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*/ strcmp(char *, char *);
int envvarok(char *varp) {
  if (!strcmp(varp, "TERM"))
    return 1;
  if (!strcmp(varp, "DISPLAY"))
    return 1;
  if (!strcmp(varp, "USER"))
    return 1;
  if (!strcmp(varp, "LOGNAME"))
    return 1;
  if (!strcmp(varp, "POSIXLY_CORRECT"))
    return 1;
  return 0;
}


x86 assembly (clang, -O0):
<envvarok>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x10(%rbp)
mov    -0x10(%rbp),%rdi
lea    0xed9(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1141 <envvarok+0x31>
movl   $0x1,-0x4(%rbp)
jmp    11dc <envvarok+0xcc>
mov    -0x10(%rbp),%rdi
lea    0xeb9(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    1166 <envvarok+0x56>
movl   $0x1,-0x4(%rbp)
jmp    11dc <envvarok+0xcc>
mov    -0x10(%rbp),%rdi
lea    0xe9c(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    118b <envvarok+0x7b>
movl   $0x1,-0x4(%rbp)
jmp    11dc <envvarok+0xcc>
mov    -0x10(%rbp),%rdi
lea    0xe7c(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11b0 <envvarok+0xa0>
movl   $0x1,-0x4(%rbp)
jmp    11dc <envvarok+0xcc>
mov    -0x10(%rbp),%rdi
lea    0xe5f(%rip),%rsi
call   1030 <strcmp@plt>
cmp    $0x0,%eax
jne    11d5 <envvarok+0xc5>
movl   $0x1,-0x4(%rbp)
jmp    11dc <envvarok+0xcc>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<envvarok>:
push   %rbp
push   %rbx
push   %rax
mov    %rdi,%rbx
lea    0xee3(%rip),%rsi
call   1030 <strcmp@plt>
mov    $0x1,%ebp
test   %eax,%eax
je     117b <envvarok+0x6b>
lea    0xed3(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     117b <envvarok+0x6b>
lea    0xec8(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     117b <envvarok+0x6b>
lea    0xeba(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
test   %eax,%eax
je     117b <envvarok+0x6b>
lea    0xeaf(%rip),%rsi
mov    %rbx,%rdi
call   1030 <strcmp@plt>
xor    %ebp,%ebp
test   %eax,%eax
sete   %bpl
mov    %ebp,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [5 x i8] c"TERM\00"
@.str.1 = [8 x i8] c"DISPLAY\00"
@.str.2 = [5 x i8] c"USER\00"
@.str.3 = [8 x i8] c"LOGNAME\00"
@.str.4 = [16 x i8] c"POSIXLY_CORRECT\00"
define i32 @envvarok(i8* %0) {
%2 = alloca i32
%3 = alloca i8*
store i8* %0, i8** %3
%4 = load i8*, i8** %3
%5 = call i32 @strcmp(i8* %4, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%6 = icmp ne i32 %5, 0
br i1 %6, label %8, label %7
7: ; preds = %1
store i32 1, i32* %2
br label %29
8: ; preds = %1
%9 = load i8*, i8** %3
%10 = call i32 @strcmp(i8* %9, i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
%11 = icmp ne i32 %10, 0
br i1 %11, label %13, label %12
12: ; preds = %8
store i32 1, i32* %2
br label %29
13: ; preds = %8
%14 = load i8*, i8** %3
%15 = call i32 @strcmp(i8* %14, i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%16 = icmp ne i32 %15, 0
br i1 %16, label %18, label %17
17: ; preds = %13
store i32 1, i32* %2
br label %29
18: ; preds = %13
%19 = load i8*, i8** %3
%20 = call i32 @strcmp(i8* %19, i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
%21 = icmp ne i32 %20, 0
br i1 %21, label %23, label %22
22: ; preds = %18
store i32 1, i32* %2
br label %29
23: ; preds = %18
%24 = load i8*, i8** %3
%25 = call i32 @strcmp(i8* %24, i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.4, i64 0, i64 0))
%26 = icmp ne i32 %25, 0
br i1 %26, label %28, label %27
27: ; preds = %23
store i32 1, i32* %2
br label %29
28: ; preds = %23
store i32 0, i32* %2
br label %29
29: ; preds = %28, %27, %22, %17, %12, %7
%30 = load i32, i32* %2
ret i32 %30
}

LLVM IR (-O2):
@.str = [5 x i8] c"TERM\00"
@.str.1 = [8 x i8] c"DISPLAY\00"
@.str.2 = [5 x i8] c"USER\00"
@.str.3 = [8 x i8] c"LOGNAME\00"
@.str.4 = [16 x i8] c"POSIXLY_CORRECT\00"
define i32 @envvarok(i8* nocapture %0) {
%2 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(5) getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0))
%3 = icmp eq i32 %2, 0
br i1 %3, label %17, label %4
4: ; preds = %1
%5 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(8) getelementptr inbounds ([8 x i8], [8 x i8]* @.str.1, i64 0, i64 0))
%6 = icmp eq i32 %5, 0
br i1 %6, label %17, label %7
7: ; preds = %4
%8 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(5) getelementptr inbounds ([5 x i8], [5 x i8]* @.str.2, i64 0, i64 0))
%9 = icmp eq i32 %8, 0
br i1 %9, label %17, label %10
10: ; preds = %7
%11 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(8) getelementptr inbounds ([8 x i8], [8 x i8]* @.str.3, i64 0, i64 0))
%12 = icmp eq i32 %11, 0
br i1 %12, label %17, label %13
13: ; preds = %10
%14 = tail call i32 @strcmp(i8* dereferenceable(1) %0, i8* dereferenceable(16) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.4, i64 0, i64 0))
%15 = icmp eq i32 %14, 0
%16 = zext i1 %15 to i32
br label %17
17: ; preds = %13, %10, %7, %4, %1
%18 = phi i32 [ 1, %1 ], [ 1, %4 ], [ 1, %7 ], [ 1, %10 ], [ %16, %13 ]
ret i32 %18
}