#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, double);
int /*<<< orphan*/ scanf(char *, double *);
int main() {
  double x;
  int i;
  scanf("%lf", &x);
  for (i = 0; i < 100; i++) {
    printf("N[%d] = %0.4lf\n", i, x);
    x = x / 2;
  }
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xed2(%rip),%rdi
lea    -0x10(%rbp),%rsi
call   1040 <scanf@plt>
movl   $0x0,-0x14(%rbp)
cmpl   $0x64,-0x14(%rbp)
jge    1188 <main+0x68>
mov    -0x14(%rbp),%esi
movsd  -0x10(%rbp),%xmm0
lea    0xead(%rip),%rdi
call   1030 <printf@plt>
movsd  -0x10(%rbp),%xmm0
movsd  0xe8f(%rip),%xmm1
divsd  %xmm1,%xmm0
movsd  %xmm0,-0x10(%rbp)
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1146 <main+0x26>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r14
push   %rbx
push   %rax
lea    0xedd(%rip),%rdi
mov    %rsp,%rsi
call   1040 <scanf@plt>
xor    %ebx,%ebx
movsd  (%rsp),%xmm0
lea    0xecb(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
mov    %r14,%rdi
mov    %ebx,%esi
call   1030 <printf@plt>
movsd  (%rsp),%xmm0
mulsd  0xe99(%rip),%xmm0
movsd  %xmm0,(%rsp)
add    $0x1,%ebx
cmp    $0x64,%ebx
jne    1150 <main+0x30>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%lf\00"
@.str.1 = [16 x i8] c"N[%d] = %0.4lf\0A\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca double
%3 = alloca i32
store i32 0, i32* %1
%4 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double* %2)
store i32 0, i32* %3
br label %5
5: ; preds = %14, %0
%6 = load i32, i32* %3
%7 = icmp slt i32 %6, 100
br i1 %7, label %8, label %17
8: ; preds = %5
%9 = load i32, i32* %3
%10 = load double, double* %2
%11 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %9, double %10)
%12 = load double, double* %2
%13 = fdiv double %12, 2.000000e+00
store double %13, double* %2
br label %14
14: ; preds = %8
%15 = load i32, i32* %3
%16 = add nsw i32 %15, 1
store i32 %16, i32* %3
br label %5
17: ; preds = %5
ret i32 0
}

LLVM IR (-O2):
@.str = [4 x i8] c"%lf\00"
@.str.1 = [16 x i8] c"N[%d] = %0.4lf\0A\00"
define i32 @main() {
%1 = alloca double
%2 = bitcast double* %1 to i8*
%3 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), double* %1)
%4 = load double, double* %1
br label %5
5: ; preds = %0, %5
%6 = phi double [ %4, %0 ], [ %10, %5 ]
%7 = phi i32 [ 0, %0 ], [ %11, %5 ]
%8 = call i32 @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0), i32 %7, double %6)
%9 = load double, double* %1
%10 = fmul double %9, 5.000000e-01
store double %10, double* %1
%11 = add nuw nsw i32 %7, 1
%12 = icmp eq i32 %11, 100
br i1 %12, label %13, label %5
13: ; preds = %5
ret i32 0
}