#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 M_PI;
float sin(int);
float waveshaper_rect_sine(float signal, float curve) {
  float value = sin(2 * M_PI * curve * signal);
  if (value < 0.0f)
    value = -value;
  signal = (0.5f * value + 0.5f) * signal;
  return signal;
}


x86 assembly (clang, -O0):
<waveshaper_rect_sine>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
movss  %xmm0,-0x4(%rbp)
movss  %xmm1,-0x8(%rbp)
mov    0x2ebf(%rip),%rax
mov    (%rax),%eax
shl    $0x1,%eax
cvtsi2ss %eax,%xmm0
mulss  -0x8(%rbp),%xmm0
mulss  -0x4(%rbp),%xmm0
cvttss2si %xmm0,%edi
call   1030 <sin@plt>
movss  %xmm0,-0xc(%rbp)
xorps  %xmm0,%xmm0
ucomiss -0xc(%rbp),%xmm0
jbe    116e <waveshaper_rect_sine+0x5e>
movss  -0xc(%rbp),%xmm0
movd   %xmm0,%eax
xor    $0x80000000,%eax
movd   %eax,%xmm0
movss  %xmm0,-0xc(%rbp)
movss  -0xc(%rbp),%xmm0
movss  0xe85(%rip),%xmm1
mulss  %xmm1,%xmm0
addss  %xmm1,%xmm0
mulss  -0x4(%rbp),%xmm0
movss  %xmm0,-0x4(%rbp)
movss  -0x4(%rbp),%xmm0
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<waveshaper_rect_sine>:
push   %rax
movss  %xmm0,0x4(%rsp)
mov    0x2eca(%rip),%rax
mov    (%rax),%eax
add    %eax,%eax
cvtsi2ss %eax,%xmm2
mulss  %xmm1,%xmm2
mulss  %xmm0,%xmm2
cvttss2si %xmm2,%edi
call   1030 <sin@plt>
movaps 0xec2(%rip),%xmm2
xorps  %xmm0,%xmm2
xorps  %xmm3,%xmm3
movaps %xmm0,%xmm1
cmpltss %xmm3,%xmm1
andps  %xmm1,%xmm2
andnps %xmm0,%xmm1
orps   %xmm2,%xmm1
movss  0xeb3(%rip),%xmm0
mulss  %xmm0,%xmm1
addss  %xmm0,%xmm1
mulss  0x4(%rsp),%xmm1
movaps %xmm1,%xmm0
pop    %rax
ret

LLVM IR (-O0):
@M_PI = global i32 0
define float @waveshaper_rect_sine(float %0, float %1) {
%3 = alloca float
%4 = alloca float
%5 = alloca float
store float %0, float* %3
store float %1, float* %4
%6 = load i32, i32* @M_PI
%7 = mul nsw i32 2, %6
%8 = sitofp i32 %7 to float
%9 = load float, float* %4
%10 = fmul float %8, %9
%11 = load float, float* %3
%12 = fmul float %10, %11
%13 = fptosi float %12 to i32
%14 = call float @sin(i32 %13)
store float %14, float* %5
%15 = load float, float* %5
%16 = fcmp olt float %15, 0.000000e+00
br i1 %16, label %17, label %20
17: ; preds = %2
%18 = load float, float* %5
%19 = fneg float %18
store float %19, float* %5
br label %20
20: ; preds = %17, %2
%21 = load float, float* %5
%22 = call float @llvm.fmuladd.f32(float 5.000000e-01, float %21, float 5.000000e-01)
%23 = load float, float* %3
%24 = fmul float %22, %23
store float %24, float* %3
%25 = load float, float* %3
ret float %25
}

LLVM IR (-O2):
@M_PI = global i32 0
define float @waveshaper_rect_sine(float %0, float %1) {
%3 = load i32, i32* @M_PI
%4 = shl nsw i32 %3, 1
%5 = sitofp i32 %4 to float
%6 = fmul float %5, %1
%7 = fmul float %6, %0
%8 = fptosi float %7 to i32
%9 = tail call float @sin(i32 %8)
%10 = fcmp olt float %9, 0.000000e+00
%11 = fneg float %9
%12 = select i1 %10, float %11, float %9
%13 = tail call float @llvm.fmuladd.f32(float %12, float 5.000000e-01, float 5.000000e-01)
%14 = fmul float %13, %0
ret float %14
}