#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 */
scalar_t__ floor(double);
int negalucas(int);
int /*<<< orphan*/ printf(char *);
double rand_double();
double tic();
double benchmark() {
  double elapsed;
  double t;
  int x;
  int y;
  int i;
  t = tic();
  for (i = 0; i < 100; i++) {
    x = (int)floor(40.0 * rand_double());
    y = negalucas(-x);
    if (y == -7) {
      printf("should not return -7\n");
      break;
    }
  }
  elapsed = tic() - t;
  if (y == -7) {
    printf("should not return -7\n");
  }
  return elapsed;
}


x86 assembly (clang, -O0):
<benchmark>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    $0x0,%al
call   1040 <tic@plt>
movsd  %xmm0,-0x10(%rbp)
movl   $0x0,-0x1c(%rbp)
cmpl   $0x64,-0x1c(%rbp)
jge    11ce <benchmark+0x7e>
mov    $0x0,%al
call   1050 <rand_double@plt>
movaps %xmm0,%xmm1
movsd  0xe79(%rip),%xmm0
mulsd  %xmm1,%xmm0
call   1070 <floor@plt>
mov    %eax,-0x14(%rbp)
xor    %edi,%edi
sub    -0x14(%rbp),%edi
call   1060 <negalucas@plt>
mov    %eax,-0x18(%rbp)
cmpl   $0xfffffff9,-0x18(%rbp)
jne    11bb <benchmark+0x6b>
lea    0xe57(%rip),%rdi
call   1030 <printf@plt>
jmp    11ce <benchmark+0x7e>
jmp    11c0 <benchmark+0x70>
mov    -0x1c(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x1c(%rbp)
jmp    116b <benchmark+0x1b>
mov    $0x0,%al
call   1040 <tic@plt>
subsd  -0x10(%rbp),%xmm0
movsd  %xmm0,-0x8(%rbp)
cmpl   $0xfffffff9,-0x18(%rbp)
jne    11f5 <benchmark+0xa5>
lea    0xe18(%rip),%rdi
call   1030 <printf@plt>
movsd  -0x8(%rbp),%xmm0
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<benchmark>:
push   %rbx
sub    $0x10,%rsp
xor    %eax,%eax
call   1040 <tic@plt>
movsd  %xmm0,0x8(%rsp)
mov    $0x64,%ebx
nopw   0x0(%rax,%rax,1)
xor    %eax,%eax
call   1050 <rand_double@plt>
mulsd  0xe81(%rip),%xmm0
call   1070 <floor@plt>
neg    %eax
mov    %eax,%edi
call   1060 <negalucas@plt>
cmp    $0xfffffff9,%eax
je     11a0 <benchmark+0x50>
add    $0xffffffff,%ebx
jne    1170 <benchmark+0x20>
xor    %eax,%eax
call   1040 <tic@plt>
jmp    11c8 <benchmark+0x78>
lea    0xe61(%rip),%rbx
mov    %rbx,%rdi
call   1030 <puts@plt>
xor    %eax,%eax
call   1040 <tic@plt>
movsd  %xmm0,(%rsp)
mov    %rbx,%rdi
call   1030 <puts@plt>
movsd  (%rsp),%xmm0
subsd  0x8(%rsp),%xmm0
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
@.str = [22 x i8] c"should not return -7\0A\00"
define double @benchmark() {
%1 = alloca double
%2 = alloca double
%3 = alloca i32
%4 = alloca i32
%5 = alloca i32
%6 = call double (...) @tic()
store double %6, double* %2
store i32 0, i32* %5
br label %7
7: ; preds = %23, %0
%8 = load i32, i32* %5
%9 = icmp slt i32 %8, 100
br i1 %9, label %10, label %26
10: ; preds = %7
%11 = call double (...) @rand_double()
%12 = fmul double 4.000000e+01, %11
%13 = call i64 @floor(double %12)
%14 = trunc i64 %13 to i32
store i32 %14, i32* %3
%15 = load i32, i32* %3
%16 = sub nsw i32 0, %15
%17 = call i32 @negalucas(i32 %16)
store i32 %17, i32* %4
%18 = load i32, i32* %4
%19 = icmp eq i32 %18, -7
br i1 %19, label %20, label %22
20: ; preds = %10
%21 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
br label %26
22: ; preds = %10
br label %23
23: ; preds = %22
%24 = load i32, i32* %5
%25 = add nsw i32 %24, 1
store i32 %25, i32* %5
br label %7
26: ; preds = %20, %7
%27 = call double (...) @tic()
%28 = load double, double* %2
%29 = fsub double %27, %28
store double %29, double* %1
%30 = load i32, i32* %4
%31 = icmp eq i32 %30, -7
br i1 %31, label %32, label %34
32: ; preds = %26
%33 = call i32 @printf(i8* getelementptr inbounds ([22 x i8], [22 x i8]* @.str, i64 0, i64 0))
br label %34
34: ; preds = %32, %26
%35 = load double, double* %1
ret double %35
}

LLVM IR (-O2):
@str.1 = [21 x i8] c"should not return -7\00"
define double @benchmark() {
%1 = tail call double (...) @tic()
br label %5
2: ; preds = %5
%3 = add nuw nsw i32 %6, 1
%4 = icmp eq i32 %3, 100
br i1 %4, label %14, label %5
5: ; preds = %0, %2
%6 = phi i32 [ 0, %0 ], [ %3, %2 ]
%7 = tail call double (...) @rand_double()
%8 = fmul double %7, 4.000000e+01
%9 = tail call i64 @floor(double %8)
%10 = trunc i64 %9 to i32
%11 = sub nsw i32 0, %10
%12 = tail call i32 @negalucas(i32 %11)
%13 = icmp eq i32 %12, -7
br i1 %13, label %16, label %2
14: ; preds = %2
%15 = tail call double (...) @tic()
br label %20
16: ; preds = %5
%17 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.1, i64 0, i64 0))
%18 = tail call double (...) @tic()
%19 = tail call i32 @puts(i8* dereferenceable(1) getelementptr inbounds ([21 x i8], [21 x i8]* @str.1, i64 0, i64 0))
br label %20
20: ; preds = %14, %16
%21 = phi double [ %18, %16 ], [ %15, %14 ]
%22 = fsub double %21, %1
ret double %22
}