#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 *, int, ...);
int dv_test(int n, double *src) {
  int i;
  unsigned long *ul;
  printf("size = %d\n", n);
  for (i = 0; i < n; i++) {
    ul = (unsigned long *)(&(src[i]));
    printf("%d: %e %lX\n", i, src[i], *ul);
  }
  return -1;
}


x86 assembly (clang, -O0):
<dv_test>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    %rsi,-0x10(%rbp)
mov    -0x4(%rbp),%esi
lea    0xed7(%rip),%rdi
mov    $0x0,%al
call   1030 <printf@plt>
movl   $0x0,-0x14(%rbp)
mov    -0x14(%rbp),%eax
cmp    -0x4(%rbp),%eax
jge    1189 <dv_test+0x79>
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
shl    $0x3,%rcx
add    %rcx,%rax
mov    %rax,-0x20(%rbp)
mov    -0x14(%rbp),%esi
mov    -0x10(%rbp),%rax
movslq -0x14(%rbp),%rcx
movsd  (%rax,%rcx,8),%xmm0
mov    -0x20(%rbp),%rax
mov    (%rax),%rdx
lea    0xe97(%rip),%rdi
mov    $0x1,%al
call   1030 <printf@plt>
mov    -0x14(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x14(%rbp)
jmp    1137 <dv_test+0x27>
mov    $0xffffffff,%eax
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<dv_test>:
push   %r15
push   %r14
push   %r12
push   %rbx
push   %rax
mov    %rsi,%r14
mov    %edi,%ebx
lea    0xedc(%rip),%rdi
mov    %ebx,%esi
xor    %eax,%eax
call   1030 <printf@plt>
test   %ebx,%ebx
jle    1160 <dv_test+0x50>
mov    %ebx,%r12d
xor    %ebx,%ebx
lea    0xece(%rip),%r15
nopl   (%rax)
movq   (%r14,%rbx,8),%xmm0
movq   %xmm0,%rdx
mov    %r15,%rdi
mov    %ebx,%esi
mov    $0x1,%al
call   1030 <printf@plt>
add    $0x1,%rbx
cmp    %rbx,%r12
jne    1140 <dv_test+0x30>
mov    $0xffffffff,%eax
add    $0x8,%rsp
pop    %rbx
pop    %r12
pop    %r14
pop    %r15
ret

LLVM IR (-O0):
@.str = [11 x i8] c"size = %d\0A\00"
@.str.1 = [12 x i8] c"%d: %e %lX\0A\00"
define i32 @dv_test(i32 %0, double* %1) {
%3 = alloca i32
%4 = alloca double*
%5 = alloca i32
%6 = alloca i64*
store i32 %0, i32* %3
store double* %1, double** %4
%7 = load i32, i32* %3
%8 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %7)
store i32 0, i32* %5
br label %9
9: ; preds = %28, %2
%10 = load i32, i32* %5
%11 = load i32, i32* %3
%12 = icmp slt i32 %10, %11
br i1 %12, label %13, label %31
13: ; preds = %9
%14 = load double*, double** %4
%15 = load i32, i32* %5
%16 = sext i32 %15 to i64
%17 = getelementptr inbounds double, double* %14, i64 %16
%18 = bitcast double* %17 to i64*
store i64* %18, i64** %6
%19 = load i32, i32* %5
%20 = load double*, double** %4
%21 = load i32, i32* %5
%22 = sext i32 %21 to i64
%23 = getelementptr inbounds double, double* %20, i64 %22
%24 = load double, double* %23
%25 = load i64*, i64** %6
%26 = load i64, i64* %25
%27 = call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %19, double %24, i64 %26)
br label %28
28: ; preds = %13
%29 = load i32, i32* %5
%30 = add nsw i32 %29, 1
store i32 %30, i32* %5
br label %9
31: ; preds = %9
ret i32 -1
}

LLVM IR (-O2):
@.str = [11 x i8] c"size = %d\0A\00"
@.str.1 = [12 x i8] c"%d: %e %lX\0A\00"
define i32 @dv_test(i32 %0, double* nocapture %1) {
%3 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i64 0, i64 0), i32 %0)
%4 = icmp sgt i32 %0, 0
br i1 %4, label %5, label %16
5: ; preds = %2
%6 = zext i32 %0 to i64
br label %7
7: ; preds = %5, %7
%8 = phi i64 [ 0, %5 ], [ %14, %7 ]
%9 = getelementptr inbounds double, double* %1, i64 %8
%10 = load double, double* %9
%11 = bitcast double %10 to i64
%12 = trunc i64 %8 to i32
%13 = tail call i32 (i8*, i32, ...) @printf(i8* getelementptr inbounds ([12 x i8], [12 x i8]* @.str.1, i64 0, i64 0), i32 %12, double %10, i64 %11)
%14 = add nuw nsw i64 %8, 1
%15 = icmp eq i64 %14, %6
br i1 %15, label %16, label %7
16: ; preds = %7, %2
ret i32 -1
}