#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 */
typedef int /*<<< orphan*/ __m128;

/* Variables and functions */
int /*<<< orphan*/ _MM_SHUFFLE(int, int, int /*<<< orphan*/, int);
int /*<<< orphan*/ _mm_add_ps(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_add_ss(int /*<<< orphan*/, int /*<<< orphan*/);
float _mm_cvtss_f32(int /*<<< orphan*/);
int /*<<< orphan*/ _mm_movehl_ps(int /*<<< orphan*/, int /*<<< orphan*/);
int /*<<< orphan*/ _mm_shuffle_ps(int /*<<< orphan*/, int /*<<< orphan*/,
                                  int /*<<< orphan*/);
float hsum_ps_SSE1(__m128 v) {
  __m128 shuf = _mm_shuffle_ps(v, v, _MM_SHUFFLE(2, 3, 0, 1));
  __m128 sums = _mm_add_ps(v, shuf);
  shuf = _mm_movehl_ps(shuf, sums);
  sums = _mm_add_ss(sums, shuf);
  return _mm_cvtss_f32(sums);
}


x86 assembly (clang, -O0):
<hsum_ps_SSE1>:
push   %rbp
mov    %rsp,%rbp
sub    $0x20,%rsp
mov    %edi,-0x4(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x14(%rbp)
mov    -0x4(%rbp),%eax
mov    %eax,-0x10(%rbp)
mov    $0x2,%edi
mov    $0x3,%esi
xor    %edx,%edx
mov    $0x1,%ecx
call   1040 <_MM_SHUFFLE@plt>
mov    -0x14(%rbp),%edi
mov    -0x10(%rbp),%esi
mov    %eax,%edx
call   1050 <_mm_shuffle_ps@plt>
mov    %eax,-0x8(%rbp)
mov    -0x4(%rbp),%edi
mov    -0x8(%rbp),%esi
call   1070 <_mm_add_ps@plt>
mov    %eax,-0xc(%rbp)
mov    -0x8(%rbp),%edi
mov    -0xc(%rbp),%esi
call   1080 <_mm_movehl_ps@plt>
mov    %eax,-0x8(%rbp)
mov    -0xc(%rbp),%edi
mov    -0x8(%rbp),%esi
call   1060 <_mm_add_ss@plt>
mov    %eax,-0xc(%rbp)
mov    -0xc(%rbp),%edi
call   1030 <_mm_cvtss_f32@plt>
add    $0x20,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<hsum_ps_SSE1>:
push   %rbp
push   %rbx
push   %rax
mov    %edi,%ebx
mov    $0x2,%edi
mov    $0x3,%esi
xor    %edx,%edx
mov    $0x1,%ecx
call   1040 <_MM_SHUFFLE@plt>
mov    %ebx,%edi
mov    %ebx,%esi
mov    %eax,%edx
call   1050 <_mm_shuffle_ps@plt>
mov    %eax,%ebp
mov    %ebx,%edi
mov    %eax,%esi
call   1070 <_mm_add_ps@plt>
mov    %eax,%ebx
mov    %ebp,%edi
mov    %eax,%esi
call   1080 <_mm_movehl_ps@plt>
mov    %ebx,%edi
mov    %eax,%esi
call   1060 <_mm_add_ss@plt>
mov    %eax,%edi
add    $0x8,%rsp
pop    %rbx
pop    %rbp
jmp    1030 <_mm_cvtss_f32@plt>

LLVM IR (-O0):
define float @hsum_ps_SSE1(i32 %0) {
%2 = alloca i32
%3 = alloca i32
%4 = alloca i32
store i32 %0, i32* %2
%5 = load i32, i32* %2
%6 = load i32, i32* %2
%7 = call i32 @_MM_SHUFFLE(i32 2, i32 3, i32 0, i32 1)
%8 = call i32 @_mm_shuffle_ps(i32 %5, i32 %6, i32 %7)
store i32 %8, i32* %3
%9 = load i32, i32* %2
%10 = load i32, i32* %3
%11 = call i32 @_mm_add_ps(i32 %9, i32 %10)
store i32 %11, i32* %4
%12 = load i32, i32* %3
%13 = load i32, i32* %4
%14 = call i32 @_mm_movehl_ps(i32 %12, i32 %13)
store i32 %14, i32* %3
%15 = load i32, i32* %4
%16 = load i32, i32* %3
%17 = call i32 @_mm_add_ss(i32 %15, i32 %16)
store i32 %17, i32* %4
%18 = load i32, i32* %4
%19 = call float @_mm_cvtss_f32(i32 %18)
ret float %19
}

LLVM IR (-O2):
define float @hsum_ps_SSE1(i32 %0) {
%2 = tail call i32 @_MM_SHUFFLE(i32 2, i32 3, i32 0, i32 1)
%3 = tail call i32 @_mm_shuffle_ps(i32 %0, i32 %0, i32 %2)
%4 = tail call i32 @_mm_add_ps(i32 %0, i32 %3)
%5 = tail call i32 @_mm_movehl_ps(i32 %3, i32 %4)
%6 = tail call i32 @_mm_add_ss(i32 %4, i32 %5)
%7 = tail call float @_mm_cvtss_f32(i32 %6)
ret float %7
}