#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*/ printf(char *, ...);
int main(int argc, const char *argv[]) {
  printf("C preprocessor symbols\n");
  printf("\n");
  printf("System identifications\n");
  printf("  symbol: %s = %d\n", "__unix__", 1);
  printf("  symbol: %s = %d\n", "__unix", 1);
  printf("  symbol: %s = %d\n", "unix", 1);
  printf("\n");
  printf("Compiler identifications:\n");
  printf("  symbol: %s = %d\n", "__STDC__", 1);
  printf("  symbol: %s = %d\n", "__GNUC__", 9);
  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)
lea    0xed3(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xf31(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xecf(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xed9(%rip),%rdi
lea    0xee5(%rip),%rsi
mov    $0x1,%edx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xebf(%rip),%rdi
lea    0xed4(%rip),%rsi
mov    $0x1,%edx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea5(%rip),%rdi
lea    0xebc(%rip),%rsi
mov    $0x1,%edx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xec7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xea0(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe6f(%rip),%rdi
lea    0xea6(%rip),%rsi
mov    $0x1,%edx
mov    $0x0,%al
call   1030 <printf@plt>
lea    0xe55(%rip),%rdi
lea    0xe95(%rip),%rsi
mov    $0x9,%edx
mov    $0x0,%al
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbx
lea    0xefd(%rip),%rdi
call   1040 <puts@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xefe(%rip),%rdi
call   1040 <puts@plt>
lea    0xea6(%rip),%rbx
lea    0xeb2(%rip),%rsi
mov    %rbx,%rdi
mov    $0x1,%edx
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xea5(%rip),%rsi
mov    %rbx,%rdi
mov    $0x1,%edx
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe91(%rip),%rsi
mov    %rbx,%rdi
mov    $0x1,%edx
xor    %eax,%eax
call   1050 <printf@plt>
mov    $0xa,%edi
call   1030 <putchar@plt>
lea    0xeb6(%rip),%rdi
call   1040 <puts@plt>
lea    0xe6a(%rip),%rsi
mov    %rbx,%rdi
mov    $0x1,%edx
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe5d(%rip),%rsi
mov    %rbx,%rdi
mov    $0x9,%edx
xor    %eax,%eax
call   1050 <printf@plt>
xor    %eax,%eax
pop    %rbx
ret

LLVM IR (-O0):
@.str = [24 x i8] c"C preprocessor symbols\0A\00"
@.str.1 = [2 x i8] c"\0A\00"
@.str.2 = [24 x i8] c"System identifications\0A\00"
@.str.3 = [19 x i8] c" symbol: %s = %d\0A\00"
@.str.4 = [9 x i8] c"__unix__\00"
@.str.5 = [7 x i8] c"__unix\00"
@.str.6 = [5 x i8] c"unix\00"
@.str.7 = [27 x i8] c"Compiler identifications:\0A\00"
@.str.8 = [9 x i8] c"__STDC__\00"
@.str.9 = [9 x i8] c"__GNUC__\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 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str, i64 0, i64 0))
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([24 x i8], [24 x i8]* @.str.2, i64 0, i64 0))
%9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0), i32 1)
%10 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i32 1)
%11 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0), i32 1)
%12 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i64 0, i64 0))
%13 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([27 x i8], [27 x i8]* @.str.7, i64 0, i64 0))
%14 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.8, i64 0, i64 0), i32 1)
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.9, i64 0, i64 0), i32 9)
ret i32 0
}

LLVM IR (-O2):
@.str.3 = [19 x i8] c" symbol: %s = %d\0A\00"
@.str.4 = [9 x i8] c"__unix__\00"
@.str.5 = [7 x i8] c"__unix\00"
@.str.6 = [5 x i8] c"unix\00"
@.str.8 = [9 x i8] c"__STDC__\00"
@.str.9 = [9 x i8] c"__GNUC__\00"
@str = [23 x i8] c"C preprocessor symbols\00"
@str.10 = [23 x i8] c"System identifications\00"
@str.11 = [26 x i8] c"Compiler identifications:\00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str, i64 0, i64 0))
%4 = tail call i32 @putchar(i32 10)
%5 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([23 x i8], [23 x i8]* @str.10, i64 0, i64 0))
%6 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.4, i64 0, i64 0), i32 1)
%7 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.5, i64 0, i64 0), i32 1)
%8 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str.6, i64 0, i64 0), i32 1)
%9 = tail call i32 @putchar(i32 10)
%10 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @str.11, i64 0, i64 0))
%11 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.8, i64 0, i64 0), i32 1)
%12 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([19 x i8], [19 x i8]* @.str.3, i64 0, i64 0), i8* getelementptr inbounds ([9 x i8], [9 x i8]* @.str.9, i64 0, i64 0), i32 9)
ret i32 0
}