void tetcircumcenter(a, b, c, d, circumcenter, cond) double a[3];
double b[3];
double c[3];
double d[3];
double circumcenter[3];
double *cond;
{
  double xba, yba, zba, xca, yca, zca, xda, yda, zda;
  double balength, calength, dalength;
  double xcrosscd, ycrosscd, zcrosscd;
  double xcrossdb, ycrossdb, zcrossdb;
  double xcrossbc, ycrossbc, zcrossbc;
  double denominator;
  double xcirca, ycirca, zcirca;
  xba = b[0] - a[0];
  yba = b[1] - a[1];
  zba = b[2] - a[2];
  xca = c[0] - a[0];
  yca = c[1] - a[1];
  zca = c[2] - a[2];
  xda = d[0] - a[0];
  yda = d[1] - a[1];
  zda = d[2] - a[2];
  balength = xba * xba + yba * yba + zba * zba;
  calength = xca * xca + yca * yca + zca * zca;
  dalength = xda * xda + yda * yda + zda * zda;
  xcrosscd = yca * zda - yda * zca;
  ycrosscd = zca * xda - zda * xca;
  zcrosscd = xca * yda - xda * yca;
  xcrossdb = yda * zba - yba * zda;
  ycrossdb = zda * xba - zba * xda;
  zcrossdb = xda * yba - xba * yda;
  xcrossbc = yba * zca - yca * zba;
  ycrossbc = zba * xca - zca * xba;
  zcrossbc = xba * yca - xca * yba;
  *cond = orient3d(b, c, d, a);
  denominator = 0.5 / (*cond);
  xcirca = (balength * xcrosscd + calength * xcrossdb + dalength * xcrossbc) *
           denominator;
  ycirca = (balength * ycrosscd + calength * ycrossdb + dalength * ycrossbc) *
           denominator;
  zcirca = (balength * zcrosscd + calength * zcrossdb + dalength * zcrossbc) *
           denominator;
  circumcenter[0] = xcirca;
  circumcenter[1] = ycirca;
  circumcenter[2] = zcirca;
}


x86 assembly (clang, -O0):
<tetcircumcenter>:
push   %rbp
mov    %rsp,%rbp
sub    $0x100,%rsp
mov    %rdi,-0x8(%rbp)
mov    %rsi,-0x10(%rbp)
mov    %rdx,-0x18(%rbp)
mov    %rcx,-0x20(%rbp)
mov    %r8,-0x28(%rbp)
mov    %r9,-0x30(%rbp)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  (%rax),%xmm0
movsd  %xmm0,-0x38(%rbp)
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x8(%rax),%xmm0
movsd  %xmm0,-0x40(%rbp)
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x10(%rax),%xmm0
movsd  %xmm0,-0x48(%rbp)
mov    -0x18(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  (%rax),%xmm0
movsd  %xmm0,-0x50(%rbp)
mov    -0x18(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x8(%rax),%xmm0
movsd  %xmm0,-0x58(%rbp)
mov    -0x18(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x10(%rax),%xmm0
movsd  %xmm0,-0x60(%rbp)
mov    -0x20(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  (%rax),%xmm0
movsd  %xmm0,-0x68(%rbp)
mov    -0x20(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x8(%rax),%xmm0
movsd  %xmm0,-0x70(%rbp)
mov    -0x20(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x8(%rbp),%rax
subsd  0x10(%rax),%xmm0
movsd  %xmm0,-0x78(%rbp)
movsd  -0x38(%rbp),%xmm1
movsd  -0x38(%rbp),%xmm2
movsd  -0x40(%rbp),%xmm0
mulsd  -0x40(%rbp),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x48(%rbp),%xmm0
movsd  -0x48(%rbp),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0x80(%rbp)
movsd  -0x50(%rbp),%xmm1
movsd  -0x50(%rbp),%xmm2
movsd  -0x58(%rbp),%xmm0
mulsd  -0x58(%rbp),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x60(%rbp),%xmm0
movsd  -0x60(%rbp),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0x88(%rbp)
ff
movsd  -0x68(%rbp),%xmm1
movsd  -0x68(%rbp),%xmm2
movsd  -0x70(%rbp),%xmm0
mulsd  -0x70(%rbp),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x78(%rbp),%xmm0
movsd  -0x78(%rbp),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0x90(%rbp)
ff
movsd  -0x58(%rbp),%xmm0
movsd  -0x78(%rbp),%xmm2
movsd  -0x70(%rbp),%xmm1
mulsd  -0x60(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0x98(%rbp)
ff
movsd  -0x60(%rbp),%xmm0
movsd  -0x68(%rbp),%xmm2
movsd  -0x78(%rbp),%xmm1
mulsd  -0x50(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xa0(%rbp)
ff
movsd  -0x50(%rbp),%xmm0
movsd  -0x70(%rbp),%xmm2
movsd  -0x68(%rbp),%xmm1
mulsd  -0x58(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xa8(%rbp)
ff
movsd  -0x70(%rbp),%xmm0
movsd  -0x48(%rbp),%xmm2
movsd  -0x40(%rbp),%xmm1
mulsd  -0x78(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xb0(%rbp)
ff
movsd  -0x78(%rbp),%xmm0
movsd  -0x38(%rbp),%xmm2
movsd  -0x48(%rbp),%xmm1
mulsd  -0x68(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xb8(%rbp)
ff
movsd  -0x68(%rbp),%xmm0
movsd  -0x40(%rbp),%xmm2
movsd  -0x38(%rbp),%xmm1
mulsd  -0x70(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xc0(%rbp)
ff
movsd  -0x40(%rbp),%xmm0
movsd  -0x60(%rbp),%xmm2
movsd  -0x58(%rbp),%xmm1
mulsd  -0x48(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xc8(%rbp)
ff
movsd  -0x48(%rbp),%xmm0
movsd  -0x50(%rbp),%xmm2
movsd  -0x60(%rbp),%xmm1
mulsd  -0x38(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xd0(%rbp)
ff
movsd  -0x38(%rbp),%xmm0
movsd  -0x58(%rbp),%xmm2
movsd  -0x50(%rbp),%xmm1
mulsd  -0x40(%rbp),%xmm1
movq   %xmm1,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm1
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movsd  %xmm0,-0xd8(%rbp)
ff
mov    -0x10(%rbp),%rdi
mov    -0x18(%rbp),%rsi
mov    -0x20(%rbp),%rdx
mov    -0x8(%rbp),%rcx
mov    $0x0,%al
call   1030 <orient3d@plt>
cvtsi2sd %eax,%xmm0
mov    -0x30(%rbp),%rax
movsd  %xmm0,(%rax)
mov    -0x30(%rbp),%rax
movsd  0xb23(%rip),%xmm0
divsd  (%rax),%xmm0
movsd  %xmm0,-0xe0(%rbp)
ff
movsd  -0x80(%rbp),%xmm1
movsd  -0x98(%rbp),%xmm2
ff
movsd  -0x88(%rbp),%xmm0
ff
mulsd  -0xb0(%rbp),%xmm0
ff
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x90(%rbp),%xmm0
ff
movsd  -0xc8(%rbp),%xmm2
ff
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
mulsd  -0xe0(%rbp),%xmm0
ff
movsd  %xmm0,-0xe8(%rbp)
ff
movsd  -0x80(%rbp),%xmm1
movsd  -0xa0(%rbp),%xmm2
ff
movsd  -0x88(%rbp),%xmm0
ff
mulsd  -0xb8(%rbp),%xmm0
ff
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x90(%rbp),%xmm0
ff
movsd  -0xd0(%rbp),%xmm2
ff
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
mulsd  -0xe0(%rbp),%xmm0
ff
movsd  %xmm0,-0xf0(%rbp)
ff
movsd  -0x80(%rbp),%xmm1
movsd  -0xa8(%rbp),%xmm2
ff
movsd  -0x88(%rbp),%xmm0
ff
mulsd  -0xc0(%rbp),%xmm0
ff
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
movsd  -0x90(%rbp),%xmm0
ff
movsd  -0xd8(%rbp),%xmm2
ff
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
mulsd  -0xe0(%rbp),%xmm0
ff
movsd  %xmm0,-0xf8(%rbp)
ff
movsd  -0xe8(%rbp),%xmm0
ff
mov    -0x28(%rbp),%rax
movsd  %xmm0,(%rax)
movsd  -0xf0(%rbp),%xmm0
ff
mov    -0x28(%rbp),%rax
movsd  %xmm0,0x8(%rax)
movsd  -0xf8(%rbp),%xmm0
ff
mov    -0x28(%rbp),%rax
movsd  %xmm0,0x10(%rax)
add    $0x100,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<tetcircumcenter>:
push   %r14
push   %rbx
sub    $0x98,%rsp
mov    %r9,%r14
mov    %r8,%rbx
mov    %rdi,%rax
movsd  (%rsi),%xmm8
movsd  (%rdi),%xmm2
subsd  %xmm2,%xmm8
movupd 0x8(%rsi),%xmm15
movupd 0x8(%rdi),%xmm3
subpd  %xmm3,%xmm15
movsd  0x8(%rdx),%xmm10
movsd  0x10(%rdx),%xmm12
movhpd (%rdx),%xmm12
subsd  %xmm3,%xmm10
movsd  0x8(%rcx),%xmm13
subsd  %xmm3,%xmm13
movapd %xmm3,%xmm4
shufpd $0x1,%xmm2,%xmm4
subpd  %xmm4,%xmm12
movsd  0x10(%rcx),%xmm9
movhpd (%rcx),%xmm9
subpd  %xmm4,%xmm9
movapd %xmm15,%xmm4
movapd %xmm15,%xmm0
mulsd  %xmm15,%xmm0
movapd %xmm10,%xmm11
movapd %xmm12,%xmm1
unpckhpd %xmm12,%xmm1
movapd %xmm13,0x10(%rsp)
movapd %xmm13,%xmm14
movapd %xmm10,%xmm3
movapd %xmm10,(%rsp)
movapd %xmm1,%xmm2
mulsd  %xmm13,%xmm2
movapd %xmm2,0x40(%rsp)
shufpd $0x1,%xmm8,%xmm4
mulsd  %xmm8,%xmm13
mulsd  %xmm8,%xmm10
mulsd  %xmm8,%xmm8
addsd  %xmm0,%xmm8
movapd %xmm9,%xmm0
unpcklpd %xmm9,%xmm14
movapd %xmm12,%xmm6
mulpd  %xmm14,%xmm6
unpcklpd %xmm12,%xmm3
mulpd  %xmm4,%xmm14
movapd %xmm14,0x30(%rsp)
mulpd  %xmm3,%xmm4
mulpd  %xmm9,%xmm3
movapd %xmm9,0x20(%rsp)
mulpd  %xmm15,%xmm9
unpckhpd %xmm0,%xmm0
movapd (%rsp),%xmm2
mulsd  %xmm0,%xmm2
movapd %xmm0,%xmm7
mulsd  %xmm15,%xmm0
movapd %xmm12,%xmm14
mulpd  %xmm15,%xmm12
movapd %xmm1,%xmm5
mulsd  %xmm15,%xmm1
unpckhpd %xmm15,%xmm15
mulsd  %xmm15,%xmm15
addsd  %xmm8,%xmm15
movapd %xmm15,(%rsp)
mulsd  %xmm11,%xmm11
mulsd  %xmm5,%xmm5
addsd  %xmm11,%xmm5
mulsd  %xmm14,%xmm14
addsd  %xmm5,%xmm14
movapd %xmm14,0x70(%rsp)
movapd 0x10(%rsp),%xmm5
mulsd  %xmm5,%xmm5
mulsd  %xmm7,%xmm7
addsd  %xmm5,%xmm7
movapd 0x20(%rsp),%xmm5
mulsd  %xmm5,%xmm5
addsd  %xmm7,%xmm5
movapd %xmm5,0x20(%rsp)
subpd  %xmm6,%xmm3
movapd %xmm3,0x60(%rsp)
movapd 0x40(%rsp),%xmm3
subsd  %xmm2,%xmm3
movapd %xmm3,0x40(%rsp)
movapd 0x30(%rsp),%xmm2
subpd  %xmm9,%xmm2
movapd %xmm2,0x30(%rsp)
subsd  %xmm13,%xmm0
movapd %xmm0,0x80(%rsp)
subpd  %xmm4,%xmm12
movapd %xmm12,0x50(%rsp)
subsd  %xmm1,%xmm10
movapd %xmm10,0x10(%rsp)
mov    %rsi,%rdi
mov    %rdx,%rsi
mov    %rcx,%rdx
mov    %rax,%rcx
xor    %eax,%eax
call   1030 <orient3d@plt>
xorps  %xmm0,%xmm0
cvtsi2sd %eax,%xmm0
movsd  %xmm0,(%r14)
movsd  0xced(%rip),%xmm1
divsd  %xmm0,%xmm1
movapd 0x70(%rsp),%xmm6
movapd %xmm6,%xmm0
unpcklpd %xmm6,%xmm0
mulpd  0x30(%rsp),%xmm0
movapd (%rsp),%xmm4
movapd %xmm4,%xmm2
unpcklpd %xmm4,%xmm2
mulpd  0x60(%rsp),%xmm2
addpd  %xmm0,%xmm2
movapd 0x20(%rsp),%xmm5
movapd %xmm5,%xmm0
unpcklpd %xmm5,%xmm0
mulpd  0x50(%rsp),%xmm0
addpd  %xmm2,%xmm0
movapd 0x80(%rsp),%xmm3
mulsd  %xmm6,%xmm3
movapd 0x40(%rsp),%xmm2
mulsd  %xmm4,%xmm2
addsd  %xmm3,%xmm2
movapd %xmm2,%xmm3
movapd 0x10(%rsp),%xmm2
mulsd  %xmm5,%xmm2
addsd  %xmm3,%xmm2
mulsd  %xmm1,%xmm2
unpcklpd %xmm1,%xmm1
mulpd  %xmm0,%xmm1
movupd %xmm1,(%rbx)
movsd  %xmm2,0x10(%rbx)
add    $0x98,%rsp
pop    %rbx
pop    %r14
ret

LLVM IR (-O0):
define void @tetcircumcenter(double* %0, double* %1, double* %2, double* %3, double* %4, double* %5) {
%7 = alloca double*
%8 = alloca double*
%9 = alloca double*
%10 = alloca double*
%11 = alloca double*
%12 = alloca double*
%13 = alloca double
%14 = alloca double
%15 = alloca double
%16 = alloca double
%17 = alloca double
%18 = alloca double
%19 = alloca double
%20 = alloca double
%21 = alloca double
%22 = alloca double
%23 = alloca double
%24 = alloca double
%25 = alloca double
%26 = alloca double
%27 = alloca double
%28 = alloca double
%29 = alloca double
%30 = alloca double
%31 = alloca double
%32 = alloca double
%33 = alloca double
%34 = alloca double
%35 = alloca double
%36 = alloca double
%37 = alloca double
store double* %0, double** %7
store double* %1, double** %8
store double* %2, double** %9
store double* %3, double** %10
store double* %4, double** %11
store double* %5, double** %12
%38 = load double*, double** %8
%39 = getelementptr inbounds double, double* %38, i64 0
%40 = load double, double* %39
%41 = load double*, double** %7
%42 = getelementptr inbounds double, double* %41, i64 0
%43 = load double, double* %42
%44 = fsub double %40, %43
store double %44, double* %13
%45 = load double*, double** %8
%46 = getelementptr inbounds double, double* %45, i64 1
%47 = load double, double* %46
%48 = load double*, double** %7
%49 = getelementptr inbounds double, double* %48, i64 1
%50 = load double, double* %49
%51 = fsub double %47, %50
store double %51, double* %14
%52 = load double*, double** %8
%53 = getelementptr inbounds double, double* %52, i64 2
%54 = load double, double* %53
%55 = load double*, double** %7
%56 = getelementptr inbounds double, double* %55, i64 2
%57 = load double, double* %56
%58 = fsub double %54, %57
store double %58, double* %15
%59 = load double*, double** %9
%60 = getelementptr inbounds double, double* %59, i64 0
%61 = load double, double* %60
%62 = load double*, double** %7
%63 = getelementptr inbounds double, double* %62, i64 0
%64 = load double, double* %63
%65 = fsub double %61, %64
store double %65, double* %16
%66 = load double*, double** %9
%67 = getelementptr inbounds double, double* %66, i64 1
%68 = load double, double* %67
%69 = load double*, double** %7
%70 = getelementptr inbounds double, double* %69, i64 1
%71 = load double, double* %70
%72 = fsub double %68, %71
store double %72, double* %17
%73 = load double*, double** %9
%74 = getelementptr inbounds double, double* %73, i64 2
%75 = load double, double* %74
%76 = load double*, double** %7
%77 = getelementptr inbounds double, double* %76, i64 2
%78 = load double, double* %77
%79 = fsub double %75, %78
store double %79, double* %18
%80 = load double*, double** %10
%81 = getelementptr inbounds double, double* %80, i64 0
%82 = load double, double* %81
%83 = load double*, double** %7
%84 = getelementptr inbounds double, double* %83, i64 0
%85 = load double, double* %84
%86 = fsub double %82, %85
store double %86, double* %19
%87 = load double*, double** %10
%88 = getelementptr inbounds double, double* %87, i64 1
%89 = load double, double* %88
%90 = load double*, double** %7
%91 = getelementptr inbounds double, double* %90, i64 1
%92 = load double, double* %91
%93 = fsub double %89, %92
store double %93, double* %20
%94 = load double*, double** %10
%95 = getelementptr inbounds double, double* %94, i64 2
%96 = load double, double* %95
%97 = load double*, double** %7
%98 = getelementptr inbounds double, double* %97, i64 2
%99 = load double, double* %98
%100 = fsub double %96, %99
store double %100, double* %21
%101 = load double, double* %13
%102 = load double, double* %13
%103 = load double, double* %14
%104 = load double, double* %14
%105 = fmul double %103, %104
%106 = call double @llvm.fmuladd.f64(double %101, double %102, double %105)
%107 = load double, double* %15
%108 = load double, double* %15
%109 = call double @llvm.fmuladd.f64(double %107, double %108, double %106)
store double %109, double* %22
%110 = load double, double* %16
%111 = load double, double* %16
%112 = load double, double* %17
%113 = load double, double* %17
%114 = fmul double %112, %113
%115 = call double @llvm.fmuladd.f64(double %110, double %111, double %114)
%116 = load double, double* %18
%117 = load double, double* %18
%118 = call double @llvm.fmuladd.f64(double %116, double %117, double %115)
store double %118, double* %23
%119 = load double, double* %19
%120 = load double, double* %19
%121 = load double, double* %20
%122 = load double, double* %20
%123 = fmul double %121, %122
%124 = call double @llvm.fmuladd.f64(double %119, double %120, double %123)
%125 = load double, double* %21
%126 = load double, double* %21
%127 = call double @llvm.fmuladd.f64(double %125, double %126, double %124)
store double %127, double* %24
%128 = load double, double* %17
%129 = load double, double* %21
%130 = load double, double* %20
%131 = load double, double* %18
%132 = fmul double %130, %131
%133 = fneg double %132
%134 = call double @llvm.fmuladd.f64(double %128, double %129, double %133)
store double %134, double* %25
%135 = load double, double* %18
%136 = load double, double* %19
%137 = load double, double* %21
%138 = load double, double* %16
%139 = fmul double %137, %138
%140 = fneg double %139
%141 = call double @llvm.fmuladd.f64(double %135, double %136, double %140)
store double %141, double* %26
%142 = load double, double* %16
%143 = load double, double* %20
%144 = load double, double* %19
%145 = load double, double* %17
%146 = fmul double %144, %145
%147 = fneg double %146
%148 = call double @llvm.fmuladd.f64(double %142, double %143, double %147)
store double %148, double* %27
%149 = load double, double* %20
%150 = load double, double* %15
%151 = load double, double* %14
%152 = load double, double* %21
%153 = fmul double %151, %152
%154 = fneg double %153
%155 = call double @llvm.fmuladd.f64(double %149, double %150, double %154)
store double %155, double* %28
%156 = load double, double* %21
%157 = load double, double* %13
%158 = load double, double* %15
%159 = load double, double* %19
%160 = fmul double %158, %159
%161 = fneg double %160
%162 = call double @llvm.fmuladd.f64(double %156, double %157, double %161)
store double %162, double* %29
%163 = load double, double* %19
%164 = load double, double* %14
%165 = load double, double* %13
%166 = load double, double* %20
%167 = fmul double %165, %166
%168 = fneg double %167
%169 = call double @llvm.fmuladd.f64(double %163, double %164, double %168)
store double %169, double* %30
%170 = load double, double* %14
%171 = load double, double* %18
%172 = load double, double* %17
%173 = load double, double* %15
%174 = fmul double %172, %173
%175 = fneg double %174
%176 = call double @llvm.fmuladd.f64(double %170, double %171, double %175)
store double %176, double* %31
%177 = load double, double* %15
%178 = load double, double* %16
%179 = load double, double* %18
%180 = load double, double* %13
%181 = fmul double %179, %180
%182 = fneg double %181
%183 = call double @llvm.fmuladd.f64(double %177, double %178, double %182)
store double %183, double* %32
%184 = load double, double* %13
%185 = load double, double* %17
%186 = load double, double* %16
%187 = load double, double* %14
%188 = fmul double %186, %187
%189 = fneg double %188
%190 = call double @llvm.fmuladd.f64(double %184, double %185, double %189)
store double %190, double* %33
%191 = load double*, double** %8
%192 = load double*, double** %9
%193 = load double*, double** %10
%194 = load double*, double** %7
%195 = call i32 (double*, double*, double*, double*, ...) bitcast (i32 (...)* @orient3d to i32 (double*, double*, double*, double*, ...)*)(double* %191, double* %192, double* %193, double* %194)
%196 = sitofp i32 %195 to double
%197 = load double*, double** %12
store double %196, double* %197
%198 = load double*, double** %12
%199 = load double, double* %198
%200 = fdiv double 5.000000e-01, %199
store double %200, double* %34
%201 = load double, double* %22
%202 = load double, double* %25
%203 = load double, double* %23
%204 = load double, double* %28
%205 = fmul double %203, %204
%206 = call double @llvm.fmuladd.f64(double %201, double %202, double %205)
%207 = load double, double* %24
%208 = load double, double* %31
%209 = call double @llvm.fmuladd.f64(double %207, double %208, double %206)
%210 = load double, double* %34
%211 = fmul double %209, %210
store double %211, double* %35
%212 = load double, double* %22
%213 = load double, double* %26
%214 = load double, double* %23
%215 = load double, double* %29
%216 = fmul double %214, %215
%217 = call double @llvm.fmuladd.f64(double %212, double %213, double %216)
%218 = load double, double* %24
%219 = load double, double* %32
%220 = call double @llvm.fmuladd.f64(double %218, double %219, double %217)
%221 = load double, double* %34
%222 = fmul double %220, %221
store double %222, double* %36
%223 = load double, double* %22
%224 = load double, double* %27
%225 = load double, double* %23
%226 = load double, double* %30
%227 = fmul double %225, %226
%228 = call double @llvm.fmuladd.f64(double %223, double %224, double %227)
%229 = load double, double* %24
%230 = load double, double* %33
%231 = call double @llvm.fmuladd.f64(double %229, double %230, double %228)
%232 = load double, double* %34
%233 = fmul double %231, %232
store double %233, double* %37
%234 = load double, double* %35
%235 = load double*, double** %11
%236 = getelementptr inbounds double, double* %235, i64 0
store double %234, double* %236
%237 = load double, double* %36
%238 = load double*, double** %11
%239 = getelementptr inbounds double, double* %238, i64 1
store double %237, double* %239
%240 = load double, double* %37
%241 = load double*, double** %11
%242 = getelementptr inbounds double, double* %241, i64 2
store double %240, double* %242
ret void
}

LLVM IR (-O2):
define void @tetcircumcenter(double* %0, double* %1, double* %2, double* %3, double* nocapture writeonly %4, double* nocapture writeonly %5) {
%7 = load double, double* %1
%8 = load double, double* %0
%9 = fsub double %7, %8
%10 = getelementptr inbounds double, double* %1, i64 1
%11 = getelementptr inbounds double, double* %0, i64 1
%12 = bitcast double* %10 to <2 x double>*
%13 = load <2 x double>, <2 x double>* %12
%14 = bitcast double* %11 to <2 x double>*
%15 = load <2 x double>, <2 x double>* %14
%16 = fsub <2 x double> %13, %15
%17 = load double, double* %2
%18 = getelementptr inbounds double, double* %2, i64 1
%19 = load double, double* %18
%20 = extractelement <2 x double> %15, i64 0
%21 = fsub double %19, %20
%22 = getelementptr inbounds double, double* %2, i64 2
%23 = load double, double* %22
%24 = insertelement <2 x double> poison, double %23, i64 0
%25 = insertelement <2 x double> %24, double %17, i64 1
%26 = extractelement <2 x double> %15, i64 1
%27 = insertelement <2 x double> poison, double %26, i64 0
%28 = insertelement <2 x double> %27, double %8, i64 1
%29 = fsub <2 x double> %25, %28
%30 = load double, double* %3
%31 = getelementptr inbounds double, double* %3, i64 1
%32 = load double, double* %31
%33 = fsub double %32, %20
%34 = getelementptr inbounds double, double* %3, i64 2
%35 = load double, double* %34
%36 = insertelement <2 x double> poison, double %35, i64 0
%37 = insertelement <2 x double> %36, double %30, i64 1
%38 = fsub <2 x double> %37, %28
%39 = extractelement <2 x double> %16, i64 0
%40 = fmul <2 x double> %16, %16
%41 = extractelement <2 x double> %40, i64 0
%42 = tail call double @llvm.fmuladd.f64(double %9, double %9, double %41)
%43 = extractelement <2 x double> %16, i64 1
%44 = tail call double @llvm.fmuladd.f64(double %43, double %43, double %42)
%45 = fmul double %21, %21
%46 = extractelement <2 x double> %29, i64 1
%47 = tail call double @llvm.fmuladd.f64(double %46, double %46, double %45)
%48 = extractelement <2 x double> %29, i64 0
%49 = tail call double @llvm.fmuladd.f64(double %48, double %48, double %47)
%50 = fmul double %33, %33
%51 = extractelement <2 x double> %38, i64 1
%52 = tail call double @llvm.fmuladd.f64(double %51, double %51, double %50)
%53 = extractelement <2 x double> %38, i64 0
%54 = tail call double @llvm.fmuladd.f64(double %53, double %53, double %52)
%55 = insertelement <2 x double> poison, double %33, i64 0
%56 = shufflevector <2 x double> %55, <2 x double> %38, <2 x i32> <i32 0, i32 2>
%57 = fneg <2 x double> %56
%58 = fmul <2 x double> %29, %57
%59 = insertelement <2 x double> poison, double %21, i64 0
%60 = shufflevector <2 x double> %59, <2 x double> %29, <2 x i32> <i32 0, i32 2>
%61 = call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %60, <2 x double> %38, <2 x double> %58)
%62 = fneg double %51
%63 = fmul double %21, %62
%64 = tail call double @llvm.fmuladd.f64(double %46, double %33, double %63)
%65 = fneg <2 x double> %16
%66 = fmul <2 x double> %38, %65
%67 = insertelement <2 x double> poison, double %43, i64 0
%68 = insertelement <2 x double> %67, double %9, i64 1
%69 = call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %56, <2 x double> %68, <2 x double> %66)
%70 = fneg double %9
%71 = fmul double %33, %70
%72 = tail call double @llvm.fmuladd.f64(double %51, double %39, double %71)
%73 = fneg <2 x double> %60
%74 = fmul <2 x double> %68, %73
%75 = call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %16, <2 x double> %29, <2 x double> %74)
%76 = fneg double %46
%77 = fmul double %39, %76
%78 = tail call double @llvm.fmuladd.f64(double %9, double %21, double %77)
%79 = tail call i32 (double*, double*, double*, double*, ...) bitcast (i32 (...)* @orient3d to i32 (double*, double*, double*, double*, ...)*)(double* %1, double* %2, double* %3, double* %0)
%80 = sitofp i32 %79 to double
store double %80, double* %5
%81 = fdiv double 5.000000e-01, %80
%82 = insertelement <2 x double> poison, double %49, i64 0
%83 = shufflevector <2 x double> %82, <2 x double> poison, <2 x i32> zeroinitializer
%84 = fmul <2 x double> %83, %69
%85 = insertelement <2 x double> poison, double %44, i64 0
%86 = shufflevector <2 x double> %85, <2 x double> poison, <2 x i32> zeroinitializer
%87 = call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %86, <2 x double> %61, <2 x double> %84)
%88 = insertelement <2 x double> poison, double %54, i64 0
%89 = shufflevector <2 x double> %88, <2 x double> poison, <2 x i32> zeroinitializer
%90 = call <2 x double> @llvm.fmuladd.v2f64(<2 x double> %89, <2 x double> %75, <2 x double> %87)
%91 = insertelement <2 x double> poison, double %81, i64 0
%92 = shufflevector <2 x double> %91, <2 x double> poison, <2 x i32> zeroinitializer
%93 = fmul <2 x double> %92, %90
%94 = fmul double %49, %72
%95 = tail call double @llvm.fmuladd.f64(double %44, double %64, double %94)
%96 = tail call double @llvm.fmuladd.f64(double %54, double %78, double %95)
%97 = fmul double %81, %96
%98 = bitcast double* %4 to <2 x double>*
store <2 x double> %93, <2 x double>* %98
%99 = getelementptr inbounds double, double* %4, i64 2
store double %97, double* %99
ret void
}