#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 *, char *);
int /*<<< orphan*/ scanf(char *, double *);
void Read_vector(char *prompt, double x[], int n) {
  int i;
  printf("%s\n", prompt);
  for (i = 0; i < n; i++)
    scanf("%lf", &x[i]);
}


x86 assembly (clang, -O0):
<Read_vector>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
mov    -0x8(%rbp),%rsi
lea    0xec2(%rip),%rdi
call   1030 <printf@plt>
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    117f <Read_vector+0x5f>
mov    -0x10(%rbp),%rsi
movslq -0x18(%rbp),%rax
shl    $0x3,%rax
add    %rax,%rsi
lea    0xe98(%rip),%rdi
call   1040 <scanf@plt>
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    114a <Read_vector+0x2a>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<Read_vector>:
push   %rbp
push   %r14
push   %rbx
mov    %edx,%ebp
mov    %rsi,%rbx
mov    %rdi,%rsi
lea    0xecd(%rip),%rdi
call   1030 <printf@plt>
test   %ebp,%ebp
jle    1165 <Read_vector+0x45>
mov    %ebp,%ebp
lea    0xebf(%rip),%r14
cs nopw 0x0(%rax,%rax,1)
nop
mov    %r14,%rdi
mov    %rbx,%rsi
call   1040 <scanf@plt>
add    $0x8,%rbx
add    $0xffffffffffffffff,%rbp
jne    1150 <Read_vector+0x30>
pop    %rbx
pop    %r14
pop    %rbp
ret

LLVM IR (-O0):
@.str = [4 x i8] c"%s\0A\00"
@.str.1 = [4 x i8] c"%lf\00"
define void @Read_vector(i8* %0, double* %1, i32 %2) {
%4 = alloca i8*
%5 = alloca double*
%6 = alloca i32
%7 = alloca i32
store i8* %0, i8** %4
store double* %1, double** %5
store i32 %2, i32* %6
%8 = load i8*, i8** %4
%9 = call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* %8)
store i32 0, i32* %7
br label %10
10: ; preds = %20, %3
%11 = load i32, i32* %7
%12 = load i32, i32* %6
%13 = icmp slt i32 %11, %12
br i1 %13, label %14, label %23
14: ; preds = %10
%15 = load double*, double** %5
%16 = load i32, i32* %7
%17 = sext i32 %16 to i64
%18 = getelementptr inbounds double, double* %15, i64 %17
%19 = call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %18)
br label %20
20: ; preds = %14
%21 = load i32, i32* %7
%22 = add nsw i32 %21, 1
store i32 %22, i32* %7
br label %10
23: ; preds = %10
ret void
}

LLVM IR (-O2):
@.str = [4 x i8] c"%s\0A\00"
@.str.1 = [4 x i8] c"%lf\00"
define void @Read_vector(i8* %0, double* %1, i32 %2) {
%4 = tail call i32 @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i64 0, i64 0), i8* %0)
%5 = icmp sgt i32 %2, 0
br i1 %5, label %6, label %14
6: ; preds = %3
%7 = zext i32 %2 to i64
br label %8
8: ; preds = %6, %8
%9 = phi i64 [ 0, %6 ], [ %12, %8 ]
%10 = getelementptr inbounds double, double* %1, i64 %9
%11 = tail call i32 @scanf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), double* %10)
%12 = add nuw nsw i64 %9, 1
%13 = icmp eq i64 %12, %7
br i1 %13, label %14, label %8
14: ; preds = %8, %3
ret void
}