matrix_inverse(T, TIN) double T[4][4], TIN[4][4];
{
  TIN[0][0] = T[0][0];
  TIN[0][1] = T[1][0];
  TIN[0][2] = T[2][0];
  TIN[0][3] = -(T[0][0] * T[0][3] + T[1][0] * T[1][3] + T[2][0] * T[2][3]);
  TIN[1][0] = T[0][1];
  TIN[1][1] = T[1][1];
  TIN[1][2] = T[2][1];
  TIN[1][3] = -(T[0][1] * T[0][3] + T[1][1] * T[1][3] + T[2][1] * T[2][3]);
  TIN[2][0] = T[0][2];
  TIN[2][1] = T[1][2];
  TIN[2][2] = T[2][2];
  TIN[2][3] = -(T[0][2] * T[0][3] + T[1][2] * T[1][3] + T[2][2] * T[2][3]);
  TIN[3][0] = 0;
  TIN[3][1] = 0;
  TIN[3][2] = 0;
  TIN[3][3] = 1;
}


x86 assembly (clang, -O0):
<matrix_inverse>:
push   %rbp
mov    %rsp,%rbp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,(%rax)
mov    -0x10(%rbp),%rax
movsd  0x20(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x8(%rax)
mov    -0x10(%rbp),%rax
movsd  0x40(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x10(%rax)
mov    -0x10(%rbp),%rax
movsd  (%rax),%xmm1
mov    -0x10(%rbp),%rax
movsd  0x18(%rax),%xmm2
mov    -0x10(%rbp),%rax
movsd  0x20(%rax),%xmm0
mov    -0x10(%rbp),%rax
mulsd  0x38(%rax),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
mov    -0x10(%rbp),%rax
movsd  0x40(%rax),%xmm0
mov    -0x10(%rbp),%rax
movsd  0x58(%rax),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movq   %xmm0,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x18(%rax)
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x20(%rax)
mov    -0x10(%rbp),%rax
movsd  0x28(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x28(%rax)
mov    -0x10(%rbp),%rax
movsd  0x48(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x30(%rax)
mov    -0x10(%rbp),%rax
movsd  0x8(%rax),%xmm1
mov    -0x10(%rbp),%rax
movsd  0x18(%rax),%xmm2
mov    -0x10(%rbp),%rax
movsd  0x28(%rax),%xmm0
mov    -0x10(%rbp),%rax
mulsd  0x38(%rax),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
mov    -0x10(%rbp),%rax
movsd  0x48(%rax),%xmm0
mov    -0x10(%rbp),%rax
movsd  0x58(%rax),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movq   %xmm0,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x38(%rax)
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x40(%rax)
mov    -0x10(%rbp),%rax
movsd  0x30(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x48(%rax)
mov    -0x10(%rbp),%rax
movsd  0x50(%rax),%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x50(%rax)
mov    -0x10(%rbp),%rax
movsd  0x10(%rax),%xmm1
mov    -0x10(%rbp),%rax
movsd  0x18(%rax),%xmm2
mov    -0x10(%rbp),%rax
movsd  0x30(%rax),%xmm0
mov    -0x10(%rbp),%rax
mulsd  0x38(%rax),%xmm0
mulsd  %xmm2,%xmm1
addsd  %xmm0,%xmm1
mov    -0x10(%rbp),%rax
movsd  0x50(%rax),%xmm0
mov    -0x10(%rbp),%rax
movsd  0x58(%rax),%xmm2
mulsd  %xmm2,%xmm0
addsd  %xmm1,%xmm0
movq   %xmm0,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm0
mov    -0x18(%rbp),%rax
movsd  %xmm0,0x58(%rax)
mov    -0x18(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x60(%rax)
mov    -0x18(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x68(%rax)
mov    -0x18(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x70(%rax)
mov    -0x18(%rbp),%rax
movsd  0xcf3(%rip),%xmm0
movsd  %xmm0,0x78(%rax)
mov    -0x4(%rbp),%eax
pop    %rbp
ret

x86 assembly (clang, -O2):
<matrix_inverse>:
movsd  (%rdi),%xmm0
movsd  %xmm0,(%rsi)
movsd  0x20(%rdi),%xmm0
movsd  %xmm0,0x8(%rsi)
movsd  0x40(%rdi),%xmm0
movsd  %xmm0,0x10(%rsi)
movsd  (%rdi),%xmm0
movsd  0x20(%rdi),%xmm1
mulsd  0x38(%rdi),%xmm1
mulsd  0x18(%rdi),%xmm0
addsd  %xmm1,%xmm0
movsd  0x40(%rdi),%xmm1
mulsd  0x58(%rdi),%xmm1
addsd  %xmm0,%xmm1
movapd 0xeb7(%rip),%xmm0
xorpd  %xmm0,%xmm1
movlpd %xmm1,0x18(%rsi)
movsd  0x8(%rdi),%xmm1
movsd  %xmm1,0x20(%rsi)
movsd  0x28(%rdi),%xmm1
movsd  %xmm1,0x28(%rsi)
movsd  0x48(%rdi),%xmm1
movsd  %xmm1,0x30(%rsi)
movsd  0x8(%rdi),%xmm1
movsd  0x28(%rdi),%xmm2
mulsd  0x38(%rdi),%xmm2
mulsd  0x18(%rdi),%xmm1
movsd  0x48(%rdi),%xmm3
mulsd  0x58(%rdi),%xmm3
addsd  %xmm2,%xmm1
addsd  %xmm1,%xmm3
xorpd  %xmm0,%xmm3
movlpd %xmm3,0x38(%rsi)
movsd  0x10(%rdi),%xmm1
movsd  %xmm1,0x40(%rsi)
movsd  0x30(%rdi),%xmm1
movsd  %xmm1,0x48(%rsi)
movsd  0x50(%rdi),%xmm1
movsd  %xmm1,0x50(%rsi)
movsd  0x10(%rdi),%xmm1
movsd  0x30(%rdi),%xmm2
mulsd  0x38(%rdi),%xmm2
mulsd  0x18(%rdi),%xmm1
addsd  %xmm2,%xmm1
movsd  0x50(%rdi),%xmm2
mulsd  0x58(%rdi),%xmm2
addsd  %xmm1,%xmm2
xorpd  %xmm0,%xmm2
movlpd %xmm2,0x58(%rsi)
xorpd  %xmm0,%xmm0
movupd %xmm0,0x60(%rsi)
movq   $0x0,0x70(%rsi)
movabs $0x3ff0000000000000,%rax
mov    %rax,0x78(%rsi)
ret

LLVM IR (-O0):
define i32 @matrix_inverse([4 x double]* %0, [4 x double]* %1) {
%3 = alloca i32
%4 = alloca [4 x double]*
%5 = alloca [4 x double]*
store [4 x double]* %0, [4 x double]** %4
store [4 x double]* %1, [4 x double]** %5
%6 = load [4 x double]*, [4 x double]** %4
%7 = getelementptr inbounds [4 x double], [4 x double]* %6, i64 0
%8 = getelementptr inbounds [4 x double], [4 x double]* %7, i64 0, i64 0
%9 = load double, double* %8
%10 = load [4 x double]*, [4 x double]** %5
%11 = getelementptr inbounds [4 x double], [4 x double]* %10, i64 0
%12 = getelementptr inbounds [4 x double], [4 x double]* %11, i64 0, i64 0
store double %9, double* %12
%13 = load [4 x double]*, [4 x double]** %4
%14 = getelementptr inbounds [4 x double], [4 x double]* %13, i64 1
%15 = getelementptr inbounds [4 x double], [4 x double]* %14, i64 0, i64 0
%16 = load double, double* %15
%17 = load [4 x double]*, [4 x double]** %5
%18 = getelementptr inbounds [4 x double], [4 x double]* %17, i64 0
%19 = getelementptr inbounds [4 x double], [4 x double]* %18, i64 0, i64 1
store double %16, double* %19
%20 = load [4 x double]*, [4 x double]** %4
%21 = getelementptr inbounds [4 x double], [4 x double]* %20, i64 2
%22 = getelementptr inbounds [4 x double], [4 x double]* %21, i64 0, i64 0
%23 = load double, double* %22
%24 = load [4 x double]*, [4 x double]** %5
%25 = getelementptr inbounds [4 x double], [4 x double]* %24, i64 0
%26 = getelementptr inbounds [4 x double], [4 x double]* %25, i64 0, i64 2
store double %23, double* %26
%27 = load [4 x double]*, [4 x double]** %4
%28 = getelementptr inbounds [4 x double], [4 x double]* %27, i64 0
%29 = getelementptr inbounds [4 x double], [4 x double]* %28, i64 0, i64 0
%30 = load double, double* %29
%31 = load [4 x double]*, [4 x double]** %4
%32 = getelementptr inbounds [4 x double], [4 x double]* %31, i64 0
%33 = getelementptr inbounds [4 x double], [4 x double]* %32, i64 0, i64 3
%34 = load double, double* %33
%35 = load [4 x double]*, [4 x double]** %4
%36 = getelementptr inbounds [4 x double], [4 x double]* %35, i64 1
%37 = getelementptr inbounds [4 x double], [4 x double]* %36, i64 0, i64 0
%38 = load double, double* %37
%39 = load [4 x double]*, [4 x double]** %4
%40 = getelementptr inbounds [4 x double], [4 x double]* %39, i64 1
%41 = getelementptr inbounds [4 x double], [4 x double]* %40, i64 0, i64 3
%42 = load double, double* %41
%43 = fmul double %38, %42
%44 = call double @llvm.fmuladd.f64(double %30, double %34, double %43)
%45 = load [4 x double]*, [4 x double]** %4
%46 = getelementptr inbounds [4 x double], [4 x double]* %45, i64 2
%47 = getelementptr inbounds [4 x double], [4 x double]* %46, i64 0, i64 0
%48 = load double, double* %47
%49 = load [4 x double]*, [4 x double]** %4
%50 = getelementptr inbounds [4 x double], [4 x double]* %49, i64 2
%51 = getelementptr inbounds [4 x double], [4 x double]* %50, i64 0, i64 3
%52 = load double, double* %51
%53 = call double @llvm.fmuladd.f64(double %48, double %52, double %44)
%54 = fneg double %53
%55 = load [4 x double]*, [4 x double]** %5
%56 = getelementptr inbounds [4 x double], [4 x double]* %55, i64 0
%57 = getelementptr inbounds [4 x double], [4 x double]* %56, i64 0, i64 3
store double %54, double* %57
%58 = load [4 x double]*, [4 x double]** %4
%59 = getelementptr inbounds [4 x double], [4 x double]* %58, i64 0
%60 = getelementptr inbounds [4 x double], [4 x double]* %59, i64 0, i64 1
%61 = load double, double* %60
%62 = load [4 x double]*, [4 x double]** %5
%63 = getelementptr inbounds [4 x double], [4 x double]* %62, i64 1
%64 = getelementptr inbounds [4 x double], [4 x double]* %63, i64 0, i64 0
store double %61, double* %64
%65 = load [4 x double]*, [4 x double]** %4
%66 = getelementptr inbounds [4 x double], [4 x double]* %65, i64 1
%67 = getelementptr inbounds [4 x double], [4 x double]* %66, i64 0, i64 1
%68 = load double, double* %67
%69 = load [4 x double]*, [4 x double]** %5
%70 = getelementptr inbounds [4 x double], [4 x double]* %69, i64 1
%71 = getelementptr inbounds [4 x double], [4 x double]* %70, i64 0, i64 1
store double %68, double* %71
%72 = load [4 x double]*, [4 x double]** %4
%73 = getelementptr inbounds [4 x double], [4 x double]* %72, i64 2
%74 = getelementptr inbounds [4 x double], [4 x double]* %73, i64 0, i64 1
%75 = load double, double* %74
%76 = load [4 x double]*, [4 x double]** %5
%77 = getelementptr inbounds [4 x double], [4 x double]* %76, i64 1
%78 = getelementptr inbounds [4 x double], [4 x double]* %77, i64 0, i64 2
store double %75, double* %78
%79 = load [4 x double]*, [4 x double]** %4
%80 = getelementptr inbounds [4 x double], [4 x double]* %79, i64 0
%81 = getelementptr inbounds [4 x double], [4 x double]* %80, i64 0, i64 1
%82 = load double, double* %81
%83 = load [4 x double]*, [4 x double]** %4
%84 = getelementptr inbounds [4 x double], [4 x double]* %83, i64 0
%85 = getelementptr inbounds [4 x double], [4 x double]* %84, i64 0, i64 3
%86 = load double, double* %85
%87 = load [4 x double]*, [4 x double]** %4
%88 = getelementptr inbounds [4 x double], [4 x double]* %87, i64 1
%89 = getelementptr inbounds [4 x double], [4 x double]* %88, i64 0, i64 1
%90 = load double, double* %89
%91 = load [4 x double]*, [4 x double]** %4
%92 = getelementptr inbounds [4 x double], [4 x double]* %91, i64 1
%93 = getelementptr inbounds [4 x double], [4 x double]* %92, i64 0, i64 3
%94 = load double, double* %93
%95 = fmul double %90, %94
%96 = call double @llvm.fmuladd.f64(double %82, double %86, double %95)
%97 = load [4 x double]*, [4 x double]** %4
%98 = getelementptr inbounds [4 x double], [4 x double]* %97, i64 2
%99 = getelementptr inbounds [4 x double], [4 x double]* %98, i64 0, i64 1
%100 = load double, double* %99
%101 = load [4 x double]*, [4 x double]** %4
%102 = getelementptr inbounds [4 x double], [4 x double]* %101, i64 2
%103 = getelementptr inbounds [4 x double], [4 x double]* %102, i64 0, i64 3
%104 = load double, double* %103
%105 = call double @llvm.fmuladd.f64(double %100, double %104, double %96)
%106 = fneg double %105
%107 = load [4 x double]*, [4 x double]** %5
%108 = getelementptr inbounds [4 x double], [4 x double]* %107, i64 1
%109 = getelementptr inbounds [4 x double], [4 x double]* %108, i64 0, i64 3
store double %106, double* %109
%110 = load [4 x double]*, [4 x double]** %4
%111 = getelementptr inbounds [4 x double], [4 x double]* %110, i64 0
%112 = getelementptr inbounds [4 x double], [4 x double]* %111, i64 0, i64 2
%113 = load double, double* %112
%114 = load [4 x double]*, [4 x double]** %5
%115 = getelementptr inbounds [4 x double], [4 x double]* %114, i64 2
%116 = getelementptr inbounds [4 x double], [4 x double]* %115, i64 0, i64 0
store double %113, double* %116
%117 = load [4 x double]*, [4 x double]** %4
%118 = getelementptr inbounds [4 x double], [4 x double]* %117, i64 1
%119 = getelementptr inbounds [4 x double], [4 x double]* %118, i64 0, i64 2
%120 = load double, double* %119
%121 = load [4 x double]*, [4 x double]** %5
%122 = getelementptr inbounds [4 x double], [4 x double]* %121, i64 2
%123 = getelementptr inbounds [4 x double], [4 x double]* %122, i64 0, i64 1
store double %120, double* %123
%124 = load [4 x double]*, [4 x double]** %4
%125 = getelementptr inbounds [4 x double], [4 x double]* %124, i64 2
%126 = getelementptr inbounds [4 x double], [4 x double]* %125, i64 0, i64 2
%127 = load double, double* %126
%128 = load [4 x double]*, [4 x double]** %5
%129 = getelementptr inbounds [4 x double], [4 x double]* %128, i64 2
%130 = getelementptr inbounds [4 x double], [4 x double]* %129, i64 0, i64 2
store double %127, double* %130
%131 = load [4 x double]*, [4 x double]** %4
%132 = getelementptr inbounds [4 x double], [4 x double]* %131, i64 0
%133 = getelementptr inbounds [4 x double], [4 x double]* %132, i64 0, i64 2
%134 = load double, double* %133
%135 = load [4 x double]*, [4 x double]** %4
%136 = getelementptr inbounds [4 x double], [4 x double]* %135, i64 0
%137 = getelementptr inbounds [4 x double], [4 x double]* %136, i64 0, i64 3
%138 = load double, double* %137
%139 = load [4 x double]*, [4 x double]** %4
%140 = getelementptr inbounds [4 x double], [4 x double]* %139, i64 1
%141 = getelementptr inbounds [4 x double], [4 x double]* %140, i64 0, i64 2
%142 = load double, double* %141
%143 = load [4 x double]*, [4 x double]** %4
%144 = getelementptr inbounds [4 x double], [4 x double]* %143, i64 1
%145 = getelementptr inbounds [4 x double], [4 x double]* %144, i64 0, i64 3
%146 = load double, double* %145
%147 = fmul double %142, %146
%148 = call double @llvm.fmuladd.f64(double %134, double %138, double %147)
%149 = load [4 x double]*, [4 x double]** %4
%150 = getelementptr inbounds [4 x double], [4 x double]* %149, i64 2
%151 = getelementptr inbounds [4 x double], [4 x double]* %150, i64 0, i64 2
%152 = load double, double* %151
%153 = load [4 x double]*, [4 x double]** %4
%154 = getelementptr inbounds [4 x double], [4 x double]* %153, i64 2
%155 = getelementptr inbounds [4 x double], [4 x double]* %154, i64 0, i64 3
%156 = load double, double* %155
%157 = call double @llvm.fmuladd.f64(double %152, double %156, double %148)
%158 = fneg double %157
%159 = load [4 x double]*, [4 x double]** %5
%160 = getelementptr inbounds [4 x double], [4 x double]* %159, i64 2
%161 = getelementptr inbounds [4 x double], [4 x double]* %160, i64 0, i64 3
store double %158, double* %161
%162 = load [4 x double]*, [4 x double]** %5
%163 = getelementptr inbounds [4 x double], [4 x double]* %162, i64 3
%164 = getelementptr inbounds [4 x double], [4 x double]* %163, i64 0, i64 0
store double 0.000000e+00, double* %164
%165 = load [4 x double]*, [4 x double]** %5
%166 = getelementptr inbounds [4 x double], [4 x double]* %165, i64 3
%167 = getelementptr inbounds [4 x double], [4 x double]* %166, i64 0, i64 1
store double 0.000000e+00, double* %167
%168 = load [4 x double]*, [4 x double]** %5
%169 = getelementptr inbounds [4 x double], [4 x double]* %168, i64 3
%170 = getelementptr inbounds [4 x double], [4 x double]* %169, i64 0, i64 2
store double 0.000000e+00, double* %170
%171 = load [4 x double]*, [4 x double]** %5
%172 = getelementptr inbounds [4 x double], [4 x double]* %171, i64 3
%173 = getelementptr inbounds [4 x double], [4 x double]* %172, i64 0, i64 3
store double 1.000000e+00, double* %173
%174 = load i32, i32* %3
ret i32 %174
}

LLVM IR (-O2):
define i32 @matrix_inverse([4 x double]* nocapture %0, [4 x double]* nocapture writeonly %1) {
%3 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 0, i64 0
%4 = load double, double* %3
%5 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 0, i64 0
store double %4, double* %5
%6 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 1, i64 0
%7 = load double, double* %6
%8 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 0, i64 1
store double %7, double* %8
%9 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 2, i64 0
%10 = load double, double* %9
%11 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 0, i64 2
store double %10, double* %11
%12 = load double, double* %3
%13 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 0, i64 3
%14 = load double, double* %13
%15 = load double, double* %6
%16 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 1, i64 3
%17 = load double, double* %16
%18 = fmul double %15, %17
%19 = tail call double @llvm.fmuladd.f64(double %12, double %14, double %18)
%20 = load double, double* %9
%21 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 2, i64 3
%22 = load double, double* %21
%23 = tail call double @llvm.fmuladd.f64(double %20, double %22, double %19)
%24 = fneg double %23
%25 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 0, i64 3
store double %24, double* %25
%26 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 0, i64 1
%27 = load double, double* %26
%28 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 1, i64 0
store double %27, double* %28
%29 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 1, i64 1
%30 = load double, double* %29
%31 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 1, i64 1
store double %30, double* %31
%32 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 2, i64 1
%33 = load double, double* %32
%34 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 1, i64 2
store double %33, double* %34
%35 = load double, double* %26
%36 = load double, double* %13
%37 = load double, double* %29
%38 = load double, double* %16
%39 = fmul double %37, %38
%40 = tail call double @llvm.fmuladd.f64(double %35, double %36, double %39)
%41 = load double, double* %32
%42 = load double, double* %21
%43 = tail call double @llvm.fmuladd.f64(double %41, double %42, double %40)
%44 = fneg double %43
%45 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 1, i64 3
store double %44, double* %45
%46 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 0, i64 2
%47 = load double, double* %46
%48 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 2, i64 0
store double %47, double* %48
%49 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 1, i64 2
%50 = load double, double* %49
%51 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 2, i64 1
store double %50, double* %51
%52 = getelementptr inbounds [4 x double], [4 x double]* %0, i64 2, i64 2
%53 = load double, double* %52
%54 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 2, i64 2
store double %53, double* %54
%55 = load double, double* %46
%56 = load double, double* %13
%57 = load double, double* %49
%58 = load double, double* %16
%59 = fmul double %57, %58
%60 = tail call double @llvm.fmuladd.f64(double %55, double %56, double %59)
%61 = load double, double* %52
%62 = load double, double* %21
%63 = tail call double @llvm.fmuladd.f64(double %61, double %62, double %60)
%64 = fneg double %63
%65 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 2, i64 3
store double %64, double* %65
%66 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 3, i64 0
%67 = getelementptr inbounds [4 x double], [4 x double]* %1, i64 3, i64 3
%68 = bitcast double* %66 to i8*
store double 1.000000e+00, double* %67
ret i32 undef
}