#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 log(int);
int /*<<< orphan*/ printf(char *, int, unsigned int);
int main(void) {
  int e;
  for (e = 1; e < 10; ++e) {
    printf("Bit count of [%d] = [%d]\n", e, (unsigned)(log(e) / log(2)));
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movl   $0x0,-0x4(%rbp)
movl   $0x1,-0x8(%rbp)
cmpl   $0xa,-0x8(%rbp)
jge    1182 <main+0x62>
mov    -0x8(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    -0x8(%rbp),%edi
call   1040 <log@plt>
mov    %eax,-0xc(%rbp)
mov    $0x2,%edi
call   1040 <log@plt>
mov    -0x10(%rbp),%esi
mov    %eax,%ecx
mov    -0xc(%rbp),%eax
cltd
idiv   %ecx
mov    %eax,%edx
lea    0xe91(%rip),%rdi
call   1030 <printf@plt>
mov    -0x8(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x8(%rbp)
jmp    1136 <main+0x16>
xor    %eax,%eax
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %rbp
push   %rbx
push   %rax
mov    $0x1,%edi
call   1040 <log@plt>
mov    %eax,%ebx
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebx,%eax
cltd
idiv   %ecx
lea    0xeb9(%rip),%rbx
mov    %rbx,%rdi
mov    $0x1,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x2,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x3,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x3,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x4,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x4,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x5,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x5,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x6,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x6,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x7,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x7,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x8,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x8,%esi
mov    %eax,%edx
call   1030 <printf@plt>
mov    $0x9,%edi
call   1040 <log@plt>
mov    %eax,%ebp
mov    $0x2,%edi
call   1040 <log@plt>
mov    %eax,%ecx
mov    %ebp,%eax
cltd
idiv   %ecx
mov    %rbx,%rdi
mov    $0x9,%esi
mov    %eax,%edx
call   1030 <printf@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %rbp
ret

LLVM IR (-O0):
@.str = [26 x i8] c"Bit count of [%d] = [%d]\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
store i32 0, i32* %1
store i32 1, i32* %2
br label %3
3: ; preds = %13, %0
%4 = load i32, i32* %2
%5 = icmp slt i32 %4, 10
br i1 %5, label %6, label %16
6: ; preds = %3
%7 = load i32, i32* %2
%8 = load i32, i32* %2
%9 = call i32 @log(i32 %8)
%10 = call i32 @log(i32 2)
%11 = sdiv i32 %9, %10
%12 = call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 %7, i32 %11)
br label %13
13: ; preds = %6
%14 = load i32, i32* %2
%15 = add nsw i32 %14, 1
store i32 %15, i32* %2
br label %3
16: ; preds = %3
ret i32 0
}

LLVM IR (-O2):
@.str = [26 x i8] c"Bit count of [%d] = [%d]\0A\00"
define i32 @main() {
%1 = tail call i32 @log(i32 1)
%2 = tail call i32 @log(i32 2)
%3 = sdiv i32 %1, %2
%4 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 1, i32 %3)
%5 = tail call i32 @log(i32 2)
%6 = tail call i32 @log(i32 2)
%7 = sdiv i32 %5, %6
%8 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 2, i32 %7)
%9 = tail call i32 @log(i32 3)
%10 = tail call i32 @log(i32 2)
%11 = sdiv i32 %9, %10
%12 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 3, i32 %11)
%13 = tail call i32 @log(i32 4)
%14 = tail call i32 @log(i32 2)
%15 = sdiv i32 %13, %14
%16 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 4, i32 %15)
%17 = tail call i32 @log(i32 5)
%18 = tail call i32 @log(i32 2)
%19 = sdiv i32 %17, %18
%20 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 5, i32 %19)
%21 = tail call i32 @log(i32 6)
%22 = tail call i32 @log(i32 2)
%23 = sdiv i32 %21, %22
%24 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 6, i32 %23)
%25 = tail call i32 @log(i32 7)
%26 = tail call i32 @log(i32 2)
%27 = sdiv i32 %25, %26
%28 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 7, i32 %27)
%29 = tail call i32 @log(i32 8)
%30 = tail call i32 @log(i32 2)
%31 = sdiv i32 %29, %30
%32 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 8, i32 %31)
%33 = tail call i32 @log(i32 9)
%34 = tail call i32 @log(i32 2)
%35 = sdiv i32 %33, %34
%36 = tail call i32 @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str, i64 0, i64 0), i32 9, i32 %35)
ret i32 0
}