#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*/ free(int *);
int linear_search(int *, int, int);
scalar_t__ malloc(int);
int /*<<< orphan*/ printf(char *, ...);
int /*<<< orphan*/ scanf(char *, int *);
int main() {
  int n, find;
  printf("How many items? ");
  scanf("%d", &n);
  int *input = (int *)malloc(n * sizeof(int));
  printf("Enter numbers: ");
  for (int i = 0; i < n; i++) {
    scanf("%d", input + i);
  }
  printf("Find: ");
  scanf("%d", &find);
  int position = linear_search(input, find, n);
  if (position != -1) {
    printf("Data found at position %d", position);
  } else {
    printf("Data not found");
  }
  free(input);
  return 0;
}


x86 assembly (clang, -O0):
<main>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
movl   $0x0,-0x4(%rbp)
lea    0xe9a(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    0xecb(%rip),%rdi
lea    -0x8(%rbp),%rsi
call   1070 <scanf@plt>
movslq -0x8(%rbp),%rax
shl    $0x2,%rax
mov    %eax,%edi
call   1060 <malloc@plt>
mov    %rax,-0x18(%rbp)
lea    0xe7a(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
movl   $0x0,-0x1c(%rbp)
mov    -0x1c(%rbp),%eax
cmp    -0x8(%rbp),%eax
jge    11da <main+0x8a>
mov    -0x18(%rbp),%rsi
movslq -0x1c(%rbp),%rax
shl    $0x2,%rax
add    %rax,%rsi
lea    0xe78(%rip),%rdi
call   1070 <scanf@plt>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    11a5 <main+0x55>
lea    0xe40(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
lea    0xe50(%rip),%rdi
lea    -0xc(%rbp),%rsi
call   1070 <scanf@plt>
mov    -0x18(%rbp),%rdi
mov    -0xc(%rbp),%esi
mov    -0x8(%rbp),%edx
call   1040 <linear_search@plt>
mov    %eax,-0x20(%rbp)
cmpl   $0xffffffff,-0x20(%rbp)
je     122a <main+0xda>
mov    -0x20(%rbp),%esi
lea    0xe0a(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
jmp    1238 <main+0xe8>
lea    0xe11(%rip),%rdi
mov    $0x0,%al
call   1050 <printf@plt>
mov    -0x18(%rbp),%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<main>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
lea    0xea1(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xed2(%rip),%rdi
mov    %rsp,%rsi
call   1070 <scanf@plt>
mov    (%rsp),%edi
shl    $0x2,%edi
call   1060 <malloc@plt>
mov    %rax,%r14
lea    0xe87(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
cmpl   $0x0,(%rsp)
jle    11cc <main+0x7c>
xor    %r12d,%r12d
lea    0xe9e(%rip),%r15
mov    %r14,%rbx
cs nopw 0x0(%rax,%rax,1)
xchg   %ax,%ax
mov    %r15,%rdi
mov    %rbx,%rsi
call   1070 <scanf@plt>
add    $0x1,%r12
movslq (%rsp),%rax
add    $0x4,%rbx
cmp    %rax,%r12
jl     11b0 <main+0x60>
lea    0xe4e(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
lea    0xe5e(%rip),%rdi
lea    0x4(%rsp),%rsi
call   1070 <scanf@plt>
mov    0x4(%rsp),%esi
mov    (%rsp),%edx
mov    %r14,%rdi
call   1040 <linear_search@plt>
cmp    $0xffffffff,%eax
je     1211 <main+0xc1>
lea    0xe22(%rip),%rdi
mov    %eax,%esi
xor    %eax,%eax
call   1050 <printf@plt>
jmp    121f <main+0xcf>
lea    0xe2a(%rip),%rdi
xor    %eax,%eax
call   1050 <printf@plt>
mov    %r14,%rdi
call   1030 <free@plt>
xor    %eax,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [17 x i8] c"How many items? \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"Enter numbers: \00"
@.str.3 = [7 x i8] c"Find: \00"
@.str.4 = [26 x i8] c"Data found at position %d\00"
@.str.5 = [15 x i8] c"Data not found\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32*
%5 = alloca i32
%6 = alloca i32
store i32 0, i32* %1
%7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%8 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%9 = load i32, i32* %2
%10 = sext i32 %9 to i64
%11 = mul i64 %10, 4
%12 = trunc i64 %11 to i32
%13 = call i64 @malloc(i32 %12)
%14 = inttoptr i64 %13 to i32*
store i32* %14, i32** %4
%15 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0))
store i32 0, i32* %5
br label %16
16: ; preds = %26, %0
%17 = load i32, i32* %5
%18 = load i32, i32* %2
%19 = icmp slt i32 %17, %18
br i1 %19, label %20, label %29
20: ; preds = %16
%21 = load i32*, i32** %4
%22 = load i32, i32* %5
%23 = sext i32 %22 to i64
%24 = getelementptr inbounds i32, i32* %21, i64 %23
%25 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %24)
br label %26
26: ; preds = %20
%27 = load i32, i32* %5
%28 = add nsw i32 %27, 1
store i32 %28, i32* %5
br label %16
29: ; preds = %16
%30 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
%31 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %3)
%32 = load i32*, i32** %4
%33 = load i32, i32* %3
%34 = load i32, i32* %2
%35 = call i32 @linear_search(i32* %32, i32 %33, i32 %34)
store i32 %35, i32* %6
%36 = load i32, i32* %6
%37 = icmp ne i32 %36, -1
br i1 %37, label %38, label %41
38: ; preds = %29
%39 = load i32, i32* %6
%40 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0), i32 %39)
br label %43
41: ; preds = %29
%42 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.5, i64 0, i64 0))
br label %43
43: ; preds = %41, %38
%44 = load i32*, i32** %4
%45 = call i32 @free(i32* %44)
ret i32 0
}

LLVM IR (-O2):
@.str = [17 x i8] c"How many items? \00"
@.str.1 = [3 x i8] c"%d\00"
@.str.2 = [16 x i8] c"Enter numbers: \00"
@.str.3 = [7 x i8] c"Find: \00"
@.str.4 = [26 x i8] c"Data found at position %d\00"
@.str.5 = [15 x i8] c"Data not found\00"
define i32 @main() {
%1 = alloca i32
%2 = alloca i32
%3 = bitcast i32* %1 to i8*
%4 = bitcast i32* %2 to i8*
%5 = tail call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0))
%6 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %1)
%7 = load i32, i32* %1
%8 = shl i32 %7, 2
%9 = call i64 @malloc(i32 %8)
%10 = inttoptr i64 %9 to i32*
%11 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([16 x i8], [16 x i8]* @.str.2, i64 0, i64 0))
%12 = load i32, i32* %1
%13 = icmp sgt i32 %12, 0
br i1 %13, label %21, label %14
14: ; preds = %21, %0
%15 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([7 x i8], [7 x i8]* @.str.3, i64 0, i64 0))
%16 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %2)
%17 = load i32, i32* %2
%18 = load i32, i32* %1
%19 = call i32 @linear_search(i32* %10, i32 %17, i32 %18)
%20 = icmp eq i32 %19, -1
br i1 %20, label %31, label %29
21: ; preds = %0, %21
%22 = phi i64 [ %25, %21 ], [ 0, %0 ]
%23 = getelementptr inbounds i32, i32* %10, i64 %22
%24 = call i32 @scanf(i8* getelementptr inbounds ([3 x i8], [3 x i8]* @.str.1, i64 0, i64 0), i32* %23)
%25 = add nuw nsw i64 %22, 1
%26 = load i32, i32* %1
%27 = sext i32 %26 to i64
%28 = icmp slt i64 %25, %27
br i1 %28, label %21, label %14
29: ; preds = %14
%30 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([26 x i8], [26 x i8]* @.str.4, i64 0, i64 0), i32 %19)
br label %33
31: ; preds = %14
%32 = call i32 (i8*, ...) @printf(i8* dereferenceable(1) getelementptr inbounds ([15 x i8], [15 x i8]* @.str.5, i64 0, i64 0))
br label %33
33: ; preds = %31, %29
%34 = call i32 @free(i32* %10)
ret i32 0
}