void set_to_default_system(float **A) {
  A[0][0] = 3.0;
  A[0][1] = 1.0;
  A[0][2] = 9.0;
  A[0][3] = 5.0;
  A[0][4] = 1.0;
  A[1][0] = 3.0;
  A[1][1] = 5.0;
  A[1][2] = 3.0;
  A[1][3] = 4.0 / 3.0;
  A[1][4] = 4.0;
  A[2][0] = 4.0 / 3.0;
  A[2][1] = 4.0 / 3.0;
  A[2][2] = 2.0;
  A[2][3] = 3.0;
  A[2][4] = 9.0 / 4.0;
  A[3][0] = 4.0 / 3.0;
  A[3][1] = 1.0 / 2.0;
  A[3][2] = 5.0 / 3.0;
  A[3][3] = 7.0;
  A[3][4] = 8.0;
}


x86 assembly (clang, -O0):
<set_to_default_system>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x8(%rbp)
mov    -0x8(%rbp),%rax
mov    (%rax),%rax
movss  0xf01(%rip),%xmm0
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    (%rax),%rax
movss  0xefe(%rip),%xmm0
movss  %xmm0,0x4(%rax)
mov    -0x8(%rbp),%rax
mov    (%rax),%rax
movss  0xeee(%rip),%xmm0
movss  %xmm0,0x8(%rax)
mov    -0x8(%rbp),%rax
mov    (%rax),%rax
movss  0xed2(%rip),%xmm0
movss  %xmm0,0xc(%rax)
mov    -0x8(%rbp),%rax
mov    (%rax),%rax
movss  0xec2(%rip),%xmm0
movss  %xmm0,0x10(%rax)
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rax
movss  0xe9d(%rip),%xmm0
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rax
movss  0xe95(%rip),%xmm0
movss  %xmm0,0x4(%rax)
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rax
movss  0xe74(%rip),%xmm0
movss  %xmm0,0x8(%rax)
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rax
movss  0xe57(%rip),%xmm0
movss  %xmm0,0xc(%rax)
mov    -0x8(%rbp),%rax
mov    0x8(%rax),%rax
movss  0xe52(%rip),%xmm0
movss  %xmm0,0x10(%rax)
mov    -0x8(%rbp),%rax
mov    0x10(%rax),%rax
movss  0xe2d(%rip),%xmm0
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    0x10(%rax),%rax
movss  0xe19(%rip),%xmm0
movss  %xmm0,0x4(%rax)
mov    -0x8(%rbp),%rax
mov    0x10(%rax),%rax
movss  0xe10(%rip),%xmm0
movss  %xmm0,0x8(%rax)
mov    -0x8(%rbp),%rax
mov    0x10(%rax),%rax
movss  0xdf7(%rip),%xmm0
movss  %xmm0,0xc(%rax)
mov    -0x8(%rbp),%rax
mov    0x10(%rax),%rax
movss  0xdde(%rip),%xmm0
movss  %xmm0,0x10(%rax)
mov    -0x8(%rbp),%rax
mov    0x18(%rax),%rax
movss  0xdc5(%rip),%xmm0
movss  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
mov    0x18(%rax),%rax
movss  0xdad(%rip),%xmm0
movss  %xmm0,0x4(%rax)
mov    -0x8(%rbp),%rax
mov    0x18(%rax),%rax
movss  0xd94(%rip),%xmm0
movss  %xmm0,0x8(%rax)
mov    -0x8(%rbp),%rax
mov    0x18(%rax),%rax
movss  0xd7b(%rip),%xmm0
movss  %xmm0,0xc(%rax)
mov    -0x8(%rbp),%rax
mov    0x18(%rax),%rax
movss  0xd62(%rip),%xmm0
movss  %xmm0,0x10(%rax)
pop    %rbp
ret

x86 assembly (clang, -O2):
<set_to_default_system>:
mov    (%rdi),%rax
movaps 0xef6(%rip),%xmm0
movups %xmm0,(%rax)
movl   $0x3f800000,0x10(%rax)
mov    0x8(%rdi),%rax
movaps 0xef1(%rip),%xmm0
movups %xmm0,(%rax)
movl   $0x40800000,0x10(%rax)
mov    0x10(%rdi),%rax
movaps 0xeec(%rip),%xmm0
movups %xmm0,(%rax)
movl   $0x40100000,0x10(%rax)
mov    0x18(%rdi),%rax
movaps 0xee7(%rip),%xmm0
movups %xmm0,(%rax)
movl   $0x41000000,0x10(%rax)
ret

LLVM IR (-O0):
define void @set_to_default_system(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 = getelementptr inbounds float, float* %5, i64 0
store float 3.000000e+00, float* %6
%7 = load float**, float*** %2
%8 = getelementptr inbounds float*, float** %7, i64 0
%9 = load float*, float** %8
%10 = getelementptr inbounds float, float* %9, i64 1
store float 1.000000e+00, float* %10
%11 = load float**, float*** %2
%12 = getelementptr inbounds float*, float** %11, i64 0
%13 = load float*, float** %12
%14 = getelementptr inbounds float, float* %13, i64 2
store float 9.000000e+00, float* %14
%15 = load float**, float*** %2
%16 = getelementptr inbounds float*, float** %15, i64 0
%17 = load float*, float** %16
%18 = getelementptr inbounds float, float* %17, i64 3
store float 5.000000e+00, float* %18
%19 = load float**, float*** %2
%20 = getelementptr inbounds float*, float** %19, i64 0
%21 = load float*, float** %20
%22 = getelementptr inbounds float, float* %21, i64 4
store float 1.000000e+00, float* %22
%23 = load float**, float*** %2
%24 = getelementptr inbounds float*, float** %23, i64 1
%25 = load float*, float** %24
%26 = getelementptr inbounds float, float* %25, i64 0
store float 3.000000e+00, float* %26
%27 = load float**, float*** %2
%28 = getelementptr inbounds float*, float** %27, i64 1
%29 = load float*, float** %28
%30 = getelementptr inbounds float, float* %29, i64 1
store float 5.000000e+00, float* %30
%31 = load float**, float*** %2
%32 = getelementptr inbounds float*, float** %31, i64 1
%33 = load float*, float** %32
%34 = getelementptr inbounds float, float* %33, i64 2
store float 3.000000e+00, float* %34
%35 = load float**, float*** %2
%36 = getelementptr inbounds float*, float** %35, i64 1
%37 = load float*, float** %36
%38 = getelementptr inbounds float, float* %37, i64 3
store float 0x3FF5555560000000, float* %38
%39 = load float**, float*** %2
%40 = getelementptr inbounds float*, float** %39, i64 1
%41 = load float*, float** %40
%42 = getelementptr inbounds float, float* %41, i64 4
store float 4.000000e+00, float* %42
%43 = load float**, float*** %2
%44 = getelementptr inbounds float*, float** %43, i64 2
%45 = load float*, float** %44
%46 = getelementptr inbounds float, float* %45, i64 0
store float 0x3FF5555560000000, float* %46
%47 = load float**, float*** %2
%48 = getelementptr inbounds float*, float** %47, i64 2
%49 = load float*, float** %48
%50 = getelementptr inbounds float, float* %49, i64 1
store float 0x3FF5555560000000, float* %50
%51 = load float**, float*** %2
%52 = getelementptr inbounds float*, float** %51, i64 2
%53 = load float*, float** %52
%54 = getelementptr inbounds float, float* %53, i64 2
store float 2.000000e+00, float* %54
%55 = load float**, float*** %2
%56 = getelementptr inbounds float*, float** %55, i64 2
%57 = load float*, float** %56
%58 = getelementptr inbounds float, float* %57, i64 3
store float 3.000000e+00, float* %58
%59 = load float**, float*** %2
%60 = getelementptr inbounds float*, float** %59, i64 2
%61 = load float*, float** %60
%62 = getelementptr inbounds float, float* %61, i64 4
store float 2.250000e+00, float* %62
%63 = load float**, float*** %2
%64 = getelementptr inbounds float*, float** %63, i64 3
%65 = load float*, float** %64
%66 = getelementptr inbounds float, float* %65, i64 0
store float 0x3FF5555560000000, float* %66
%67 = load float**, float*** %2
%68 = getelementptr inbounds float*, float** %67, i64 3
%69 = load float*, float** %68
%70 = getelementptr inbounds float, float* %69, i64 1
store float 5.000000e-01, float* %70
%71 = load float**, float*** %2
%72 = getelementptr inbounds float*, float** %71, i64 3
%73 = load float*, float** %72
%74 = getelementptr inbounds float, float* %73, i64 2
store float 0x3FFAAAAAA0000000, float* %74
%75 = load float**, float*** %2
%76 = getelementptr inbounds float*, float** %75, i64 3
%77 = load float*, float** %76
%78 = getelementptr inbounds float, float* %77, i64 3
store float 7.000000e+00, float* %78
%79 = load float**, float*** %2
%80 = getelementptr inbounds float*, float** %79, i64 3
%81 = load float*, float** %80
%82 = getelementptr inbounds float, float* %81, i64 4
store float 8.000000e+00, float* %82
ret void
}

LLVM IR (-O2):
define void @set_to_default_system(float** nocapture %0) {
%2 = load float*, float** %0
%3 = bitcast float* %2 to <4 x float>*
store <4 x float> <float 3.000000e+00, float 1.000000e+00, float 9.000000e+00, float 5.000000e+00>, <4 x float>* %3
%4 = getelementptr inbounds float, float* %2, i64 4
store float 1.000000e+00, float* %4
%5 = getelementptr inbounds float*, float** %0, i64 1
%6 = load float*, float** %5
%7 = bitcast float* %6 to <4 x float>*
store <4 x float> <float 3.000000e+00, float 5.000000e+00, float 3.000000e+00, float 0x3FF5555560000000>, <4 x float>* %7
%8 = getelementptr inbounds float, float* %6, i64 4
store float 4.000000e+00, float* %8
%9 = getelementptr inbounds float*, float** %0, i64 2
%10 = load float*, float** %9
%11 = bitcast float* %10 to <4 x float>*
store <4 x float> <float 0x3FF5555560000000, float 0x3FF5555560000000, float 2.000000e+00, float 3.000000e+00>, <4 x float>* %11
%12 = getelementptr inbounds float, float* %10, i64 4
store float 2.250000e+00, float* %12
%13 = getelementptr inbounds float*, float** %0, i64 3
%14 = load float*, float** %13
%15 = bitcast float* %14 to <4 x float>*
store <4 x float> <float 0x3FF5555560000000, float 5.000000e-01, float 0x3FFAAAAAA0000000, float 7.000000e+00>, <4 x float>* %15
%16 = getelementptr inbounds float, float* %14, i64 4
store float 8.000000e+00, float* %16
ret void
}