#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*/ Qselect(int *, int, int /*<<< orphan*/, int);
int /*<<< orphan*/ assert(int);
int /*<<< orphan*/ printArray(int *, int);
int /*<<< orphan*/ printf(char *);
void test_Qselect() {
  printf("TEST: Qselect\n");
  int test[] = {8, 1, 4, 9, 0, 3, 5, 2, 7, 6};
  printf("test array: ");
  printArray(test, 10);
  printf("select 3rd smallest element (i.e. 2)\n");
  Qselect(test, 3, 0, 9);
  assert(test[2] == 2);
}


x86 assembly (clang, -O0):
<test_Qselect>:
push   %rbp
mov    %rsp,%rbp
sub    $0x30,%rsp
lea    0xea1(%rip),%rdi
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
lea    0xee1(%rip),%rsi
mov    $0x28,%edx
call   1060 <memcpy@plt>
lea    0xe8f(%rip),%rdi
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
mov    $0xa,%esi
call   1070 <printArray@plt>
lea    0xe82(%rip),%rdi
call   1040 <printf@plt>
lea    -0x30(%rbp),%rdi
mov    $0x3,%esi
xor    %edx,%edx
mov    $0x9,%ecx
call   1030 <Qselect@plt>
cmpl   $0x2,-0x28(%rbp)
sete   %al
and    $0x1,%al
movzbl %al,%edi
call   1050 <assert@plt>
add    $0x30,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<test_Qselect>:
push   %rbx
sub    $0x30,%rsp
lea    0xed9(%rip),%rdi
call   1040 <puts@plt>
mov    0xeb8(%rip),%rax
mov    %rax,0x20(%rsp)
movaps 0xe9c(%rip),%xmm0
movaps %xmm0,0x10(%rsp)
movaps 0xe80(%rip),%xmm0
movaps %xmm0,(%rsp)
lea    0xe9d(%rip),%rdi
call   1050 <printf@plt>
mov    %rsp,%rbx
mov    %rbx,%rdi
mov    $0xa,%esi
call   1070 <printArray@plt>
lea    0xe9c(%rip),%rdi
call   1040 <puts@plt>
mov    %rbx,%rdi
mov    $0x3,%esi
xor    %edx,%edx
mov    $0x9,%ecx
call   1030 <Qselect@plt>
xor    %edi,%edi
cmpl   $0x2,0x8(%rsp)
sete   %dil
call   1060 <assert@plt>
add    $0x30,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [15 x i8] c"TEST: Qselect\0A\00"
@__const.test_Qselect.test = [10 x i32] [i32 8, i32 1, i32 4, i32 9, i32 0, i32 3, i32 5, i32 2, i32 7, i32 6]
@.str.1 = [13 x i8] c"test array: \00"
@.str.2 = [38 x i8] c"select 3rd smallest element (i.e. 2)\0A\00"
define void @test_Qselect() {
%1 = alloca [10 x i32]
%2 = call i32 @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str, i64 0, i64 0))
%3 = bitcast [10 x i32]* %1 to i8*
%4 = call i32 @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0))
%5 = getelementptr inbounds [10 x i32], [10 x i32]* %1, i64 0, i64 0
%6 = call i32 @printArray(i32* %5, i32 10)
%7 = call i32 @printf(i8* getelementptr inbounds ([38 x i8], [38 x i8]* @.str.2, i64 0, i64 0))
%8 = getelementptr inbounds [10 x i32], [10 x i32]* %1, i64 0, i64 0
%9 = call i32 @Qselect(i32* %8, i32 3, i32 0, i32 9)
%10 = getelementptr inbounds [10 x i32], [10 x i32]* %1, i64 0, i64 2
%11 = load i32, i32* %10
%12 = icmp eq i32 %11, 2
%13 = zext i1 %12 to i32
%14 = call i32 @assert(i32 %13)
ret void
}

LLVM IR (-O2):
@__const.test_Qselect.test = [10 x i32] [i32 8, i32 1, i32 4, i32 9, i32 0, i32 3, i32 5, i32 2, i32 7, i32 6]
@.str.1 = [13 x i8] c"test array: \00"
@str = [14 x i8] c"TEST: Qselect\00"
@str.3 = [37 x i8] c"select 3rd smallest element (i.e. 2)\00"
define void @test_Qselect() {
%1 = alloca [10 x i32]
%2 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([14 x i8], [14 x i8]* @str, i64 0, i64 0))
%3 = bitcast [10 x i32]* %1 to i8*
%4 = tail call i32 @printf(i8* dereferenceable(1) getelementptr inbounds ([13 x i8], [13 x i8]* @.str.1, i64 0, i64 0))
%5 = getelementptr inbounds [10 x i32], [10 x i32]* %1, i64 0, i64 0
%6 = call i32 @printArray(i32* %5, i32 10)
%7 = call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([37 x i8], [37 x i8]* @str.3, i64 0, i64 0))
%8 = call i32 @Qselect(i32* %5, i32 3, i32 0, i32 9)
%9 = getelementptr inbounds [10 x i32], [10 x i32]* %1, i64 0, i64 2
%10 = load i32, i32* %9
%11 = icmp eq i32 %10, 2
%12 = zext i1 %11 to i32
%13 = call i32 @assert(i32 %12)
ret void
}