window_(left, right, bottom, top, hither, yon) float *left, *right, *bottom,
    *top, *hither, *yon;
{ window(*left, *right, *bottom, *top, *hither, *yon); }


x86 assembly (clang, -O0):
<window_>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %rdx,-0x20(%rbp)
mov    %rcx,-0x28(%rbp)
mov    %r8,-0x30(%rbp)
mov    %r9,-0x38(%rbp)
mov    -0x10(%rbp),%rax
movss  (%rax),%xmm0
cvtss2sd %xmm0,%xmm0
mov    -0x18(%rbp),%rax
movss  (%rax),%xmm1
cvtss2sd %xmm1,%xmm1
mov    -0x20(%rbp),%rax
movss  (%rax),%xmm2
cvtss2sd %xmm2,%xmm2
mov    -0x28(%rbp),%rax
movss  (%rax),%xmm3
cvtss2sd %xmm3,%xmm3
mov    -0x30(%rbp),%rax
movss  (%rax),%xmm4
cvtss2sd %xmm4,%xmm4
mov    -0x38(%rbp),%rax
movss  (%rax),%xmm5
cvtss2sd %xmm5,%xmm5
mov    $0x6,%al
call   1030 <window@plt>
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<window_>:
movss  (%rdi),%xmm0
cvtss2sd %xmm0,%xmm0
movss  (%rsi),%xmm1
cvtss2sd %xmm1,%xmm1
movss  (%rdx),%xmm2
cvtss2sd %xmm2,%xmm2
movss  (%rcx),%xmm3
cvtss2sd %xmm3,%xmm3
movss  (%r8),%xmm4
cvtss2sd %xmm4,%xmm4
movss  (%r9),%xmm5
cvtss2sd %xmm5,%xmm5
mov    $0x6,%al
jmp    1030 <window@plt>

LLVM IR (-O0):
define i32 @window_(float* %0, float* %1, float* %2, float* %3, float* %4, float* %5) {
%7 = alloca i32
%8 = alloca float*
%9 = alloca float*
%10 = alloca float*
%11 = alloca float*
%12 = alloca float*
%13 = alloca float*
store float* %0, float** %8
store float* %1, float** %9
store float* %2, float** %10
store float* %3, float** %11
store float* %4, float** %12
store float* %5, float** %13
%14 = load float*, float** %8
%15 = load float, float* %14
%16 = fpext float %15 to double
%17 = load float*, float** %9
%18 = load float, float* %17
%19 = fpext float %18 to double
%20 = load float*, float** %10
%21 = load float, float* %20
%22 = fpext float %21 to double
%23 = load float*, float** %11
%24 = load float, float* %23
%25 = fpext float %24 to double
%26 = load float*, float** %12
%27 = load float, float* %26
%28 = fpext float %27 to double
%29 = load float*, float** %13
%30 = load float, float* %29
%31 = fpext float %30 to double
%32 = call i32 (double, double, double, double, double, double, ...) bitcast (i32 (...)* @window to i32 (double, double, double, double, double, double, ...)*)(double %16, double %19, double %22, double %25, double %28, double %31)
%33 = load i32, i32* %7
ret i32 %33
}

LLVM IR (-O2):
define i32 @window_(float* nocapture %0, float* nocapture %1, float* nocapture %2, float* nocapture %3, float* nocapture %4, float* nocapture %5) {
%7 = load float, float* %0
%8 = fpext float %7 to double
%9 = load float, float* %1
%10 = fpext float %9 to double
%11 = load float, float* %2
%12 = fpext float %11 to double
%13 = load float, float* %3
%14 = fpext float %13 to double
%15 = load float, float* %4
%16 = fpext float %15 to double
%17 = load float, float* %5
%18 = fpext float %17 to double
%19 = tail call i32 (double, double, double, double, double, double, ...) bitcast (i32 (...)* @window to i32 (double, double, double, double, double, double, ...)*)(double %8, double %10, double %12, double %14, double %16, double %18)
ret i32 undef
}