#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 */
double NPlog2(double);
int /*<<< orphan*/ fatalx(char *, double);
void vlog2(double *a, double *b, int n) {
  int i;
  for (i = 0; i < n; i++) {
    if (b[i] <= 0.0)
      fatalx("(vlog2): negative or zero value %g\n", b[i]);
    a[i] = NPlog2(b[i]);
  }
}


x86 assembly (clang, -O0):
<vlog2>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %edx,-0x14(%rbp)
movl   $0x0,-0x18(%rbp)
mov    -0x18(%rbp),%eax
cmp    -0x14(%rbp),%eax
jge    11a2 <vlog2+0x82>
mov    -0x10(%rbp),%rax
movslq -0x18(%rbp),%rcx
xorps  %xmm0,%xmm0
ucomisd (%rax,%rcx,8),%xmm0
jb     1175 <vlog2+0x55>
mov    -0x10(%rbp),%rax
movslq -0x18(%rbp),%rcx
movsd  (%rax,%rcx,8),%xmm0
lea    0xe90(%rip),%rdi
call   1030 <fatalx@plt>
mov    -0x10(%rbp),%rax
movslq -0x18(%rbp),%rcx
movsd  (%rax,%rcx,8),%xmm0
call   1040 <NPlog2@plt>
mov    -0x8(%rbp),%rax
movslq -0x18(%rbp),%rcx
movsd  %xmm0,(%rax,%rcx,8)
mov    -0x18(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x18(%rbp)
jmp    113a <vlog2+0x1a>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<vlog2>:
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
test   %edx,%edx
jle    1186 <vlog2+0x66>
mov    %rsi,%r13
mov    %rdi,%r14
mov    %edx,%r12d
xor    %ebx,%ebx
lea    0xec9(%rip),%r15
jmp    1164 <vlog2+0x44>
cs nopw 0x0(%rax,%rax,1)
nopl   0x0(%rax,%rax,1)
call   1040 <NPlog2@plt>
movsd  %xmm0,(%r14,%rbx,8)
add    $0x1,%rbx
cmp    %rbx,%r12
je     1186 <vlog2+0x66>
movsd  0x0(%r13,%rbx,8),%xmm0
xorpd  %xmm1,%xmm1
ucomisd %xmm0,%xmm1
jb     1150 <vlog2+0x30>
mov    %r15,%rdi
call   1030 <fatalx@plt>
movsd  0x0(%r13,%rbx,8),%xmm0
jmp    1150 <vlog2+0x30>
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [36 x i8] c"(vlog2): negative or zero value %g\0A\00"
define void @vlog2(double* %0, double* %1, i32 %2) {
%4 = alloca double*
%5 = alloca double*
%6 = alloca i32
%7 = alloca i32
store double* %0, double** %4
store double* %1, double** %5
store i32 %2, i32* %6
store i32 0, i32* %7
br label %8
8: ; preds = %37, %3
%9 = load i32, i32* %7
%10 = load i32, i32* %6
%11 = icmp slt i32 %9, %10
br i1 %11, label %12, label %40
12: ; preds = %8
%13 = load double*, double** %5
%14 = load i32, i32* %7
%15 = sext i32 %14 to i64
%16 = getelementptr inbounds double, double* %13, i64 %15
%17 = load double, double* %16
%18 = fcmp ole double %17, 0.000000e+00
br i1 %18, label %19, label %26
19: ; preds = %12
%20 = load double*, double** %5
%21 = load i32, i32* %7
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds double, double* %20, i64 %22
%24 = load double, double* %23
%25 = call i32 @fatalx(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), double %24)
br label %26
26: ; preds = %19, %12
%27 = load double*, double** %5
%28 = load i32, i32* %7
%29 = sext i32 %28 to i64
%30 = getelementptr inbounds double, double* %27, i64 %29
%31 = load double, double* %30
%32 = call double @NPlog2(double %31)
%33 = load double*, double** %4
%34 = load i32, i32* %7
%35 = sext i32 %34 to i64
%36 = getelementptr inbounds double, double* %33, i64 %35
store double %32, double* %36
br label %37
37: ; preds = %26
%38 = load i32, i32* %7
%39 = add nsw i32 %38, 1
store i32 %39, i32* %7
br label %8
40: ; preds = %8
ret void
}

LLVM IR (-O2):
@.str = [36 x i8] c"(vlog2): negative or zero value %g\0A\00"
define void @vlog2(double* nocapture writeonly %0, double* nocapture %1, i32 %2) {
%4 = icmp sgt i32 %2, 0
br i1 %4, label %5, label %21
5: ; preds = %3
%6 = zext i32 %2 to i64
br label %7
7: ; preds = %5, %15
%8 = phi i64 [ 0, %5 ], [ %19, %15 ]
%9 = getelementptr inbounds double, double* %1, i64 %8
%10 = load double, double* %9
%11 = fcmp ugt double %10, 0.000000e+00
br i1 %11, label %15, label %12
12: ; preds = %7
%13 = tail call i32 @fatalx(i8* getelementptr inbounds ([36 x i8], [36 x i8]* @.str, i64 0, i64 0), double %10)
%14 = load double, double* %9
br label %15
15: ; preds = %12, %7
%16 = phi double [ %14, %12 ], [ %10, %7 ]
%17 = tail call double @NPlog2(double %16)
%18 = getelementptr inbounds double, double* %0, i64 %8
store double %17, double* %18
%19 = add nuw nsw i64 %8, 1
%20 = icmp eq i64 %19, %6
br i1 %20, label %21, label %7
21: ; preds = %15, %3
ret void
}