#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);
int strlen(char *);
int main(int argc, char *argv[]) {
  printf("sizeof__0 is %d\n", sizeof(""));
  printf("strlen__0 is %d\n", strlen(""));
  printf("sizeof__1 is %d\n", sizeof(" "));
  printf("strlen__1 is %d\n", strlen(" "));
  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    0xec3(%rip),%rdi
mov    $0x1,%esi
call   1040 <printf@plt>
lea    0xec2(%rip),%rdi
call   1030 <strlen@plt>
mov    %eax,%esi
lea    0xeb5(%rip),%rdi
call   1040 <printf@plt>
lea    0xeba(%rip),%rdi
mov    $0x2,%esi
call   1040 <printf@plt>
lea    0xecb(%rip),%rdi
call   1030 <strlen@plt>
mov    %eax,%esi
lea    0xeac(%rip),%rdi
call   1040 <printf@plt>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rax
lea    0xed8(%rip),%rdi
mov    $0x1,%esi
call   1040 <printf@plt>
lea    0xed7(%rip),%rdi
call   1030 <strlen@plt>
lea    0xecc(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
lea    0xecf(%rip),%rdi
mov    $0x2,%esi
call   1040 <printf@plt>
lea    0xee0(%rip),%rdi
call   1030 <strlen@plt>
lea    0xec3(%rip),%rdi
mov    %eax,%esi
call   1040 <printf@plt>
xor    %eax,%eax
pop    %rcx
ret

LLVM IR (-O0):
@.str = [17 x i8] c"sizeof__0 is %d\0A\00"
@.str.1 = [17 x i8] c"strlen__0 is %d\0A\00"
@.str.2 = [1 x i8] zeroinitializer
@.str.3 = [17 x i8] c"sizeof__1 is %d\0A\00"
@.str.4 = [17 x i8] c"strlen__1 is %d\0A\00"
@.str.5 = [2 x i8] c" \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 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 1)
%7 = call i32 @strlen(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.2, i64 0, i64 0))
%8 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %7)
%9 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 2)
%10 = call i32 @strlen(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
%11 = call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), i32 %10)
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"sizeof__0 is %d\0A\00"
@.str.1 = [17 x i8] c"strlen__0 is %d\0A\00"
@.str.2 = [1 x i8] zeroinitializer
@.str.3 = [17 x i8] c"sizeof__1 is %d\0A\00"
@.str.4 = [17 x i8] c"strlen__1 is %d\0A\00"
@.str.5 = [2 x i8] c" \00"
define i32 @main(i32 %0, i8** nocapture readnone %1) {
%3 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 1)
%4 = tail call i32 @strlen(i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str.2, i64 0, i64 0))
%5 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.1, i64 0, i64 0), i32 %4)
%6 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.3, i64 0, i64 0), i32 2)
%7 = tail call i32 @strlen(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.5, i64 0, i64 0))
%8 = tail call i32 @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str.4, i64 0, i64 0), i32 %7)
ret i32 0
}