#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 */
float roundf(float);
void vec4_round(float *dst) {
  dst[0] = roundf(dst[0]);
  dst[1] = roundf(dst[1]);
  dst[2] = roundf(dst[2]);
  dst[3] = roundf(dst[3]);
}


x86 assembly (clang, -O0):
<vec4_round>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
movss  (%rax),%xmm0
call   1030 <roundf@plt>
mov    -0x8(%rbp),%rax
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
movss  0x4(%rax),%xmm0
call   1030 <roundf@plt>
mov    -0x8(%rbp),%rax
movss  %xmm0,0x4(%rax)
mov    -0x8(%rbp),%rax
movss  0x8(%rax),%xmm0
call   1030 <roundf@plt>
mov    -0x8(%rbp),%rax
movss  %xmm0,0x8(%rax)
mov    -0x8(%rbp),%rax
movss  0xc(%rax),%xmm0
call   1030 <roundf@plt>
mov    -0x8(%rbp),%rax
movss  %xmm0,0xc(%rax)
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<vec4_round>:
push   %rbx
sub    $0x10,%rsp
mov    %rdi,%rbx
movss  (%rdi),%xmm0
movss  0x4(%rdi),%xmm1
movss  %xmm1,0xc(%rsp)
call   1030 <roundf@plt>
movss  %xmm0,(%rbx)
movss  0xc(%rsp),%xmm0
call   1030 <roundf@plt>
movss  %xmm0,0x4(%rbx)
movss  0x8(%rbx),%xmm0
call   1030 <roundf@plt>
movss  %xmm0,0x8(%rbx)
movss  0xc(%rbx),%xmm0
call   1030 <roundf@plt>
movss  %xmm0,0xc(%rbx)
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
define void @vec4_round(float* %0) {
%2 = alloca float*
store float* %0, float** %2
%3 = load float*, float** %2
%4 = getelementptr inbounds float, float* %3, i64 0
%5 = load float, float* %4
%6 = call float @llvm.round.f32(float %5)
%7 = load float*, float** %2
%8 = getelementptr inbounds float, float* %7, i64 0
store float %6, float* %8
%9 = load float*, float** %2
%10 = getelementptr inbounds float, float* %9, i64 1
%11 = load float, float* %10
%12 = call float @llvm.round.f32(float %11)
%13 = load float*, float** %2
%14 = getelementptr inbounds float, float* %13, i64 1
store float %12, float* %14
%15 = load float*, float** %2
%16 = getelementptr inbounds float, float* %15, i64 2
%17 = load float, float* %16
%18 = call float @llvm.round.f32(float %17)
%19 = load float*, float** %2
%20 = getelementptr inbounds float, float* %19, i64 2
store float %18, float* %20
%21 = load float*, float** %2
%22 = getelementptr inbounds float, float* %21, i64 3
%23 = load float, float* %22
%24 = call float @llvm.round.f32(float %23)
%25 = load float*, float** %2
%26 = getelementptr inbounds float, float* %25, i64 3
store float %24, float* %26
ret void
}

LLVM IR (-O2):
define void @vec4_round(float* nocapture %0) {
%2 = load float, float* %0
%3 = tail call float @llvm.round.f32(float %2)
store float %3, float* %0
%4 = getelementptr inbounds float, float* %0, i64 1
%5 = load float, float* %4
%6 = tail call float @llvm.round.f32(float %5)
store float %6, float* %4
%7 = getelementptr inbounds float, float* %0, i64 2
%8 = load float, float* %7
%9 = tail call float @llvm.round.f32(float %8)
store float %9, float* %7
%10 = getelementptr inbounds float, float* %0, i64 3
%11 = load float, float* %10
%12 = tail call float @llvm.round.f32(float %11)
store float %12, float* %10
ret void
}