#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 */
double cos(double);
double sin(double);
void cmatrix_rotx(double *m, double angle) {
  m[((((1) - 1) * 3) + ((1) - 1))] = 1.0;
  m[((((2) - 1) * 3) + ((1) - 1))] = 0.0;
  m[((((3) - 1) * 3) + ((1) - 1))] = 0.0;
  m[((((1) - 1) * 3) + ((2) - 1))] = 0.0;
  m[((((2) - 1) * 3) + ((2) - 1))] = cos(angle);
  m[((((3) - 1) * 3) + ((2) - 1))] = sin(angle);
  m[((((1) - 1) * 3) + ((3) - 1))] = 0.0;
  m[((((2) - 1) * 3) + ((3) - 1))] = -sin(angle);
  m[((((3) - 1) * 3) + ((3) - 1))] = cos(angle);
}


x86 assembly (clang, -O0):
<cmatrix_rotx>:
push   %rbp
mov    %rsp,%rbp
sub    $0x10,%rsp
mov    %rdi,-0x8(%rbp)
movsd  %xmm0,-0x10(%rbp)
mov    -0x8(%rbp),%rax
movsd  0xec3(%rip),%xmm0
movsd  %xmm0,(%rax)
mov    -0x8(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x18(%rax)
mov    -0x8(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x30(%rax)
mov    -0x8(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x8(%rax)
movsd  -0x10(%rbp),%xmm0
call   1040 <cos@plt>
mov    -0x8(%rbp),%rax
movsd  %xmm0,0x20(%rax)
movsd  -0x10(%rbp),%xmm0
call   1030 <sin@plt>
mov    -0x8(%rbp),%rax
movsd  %xmm0,0x38(%rax)
mov    -0x8(%rbp),%rax
xorps  %xmm0,%xmm0
movsd  %xmm0,0x10(%rax)
movsd  -0x10(%rbp),%xmm0
call   1030 <sin@plt>
movq   %xmm0,%rax
movabs $0x8000000000000000,%rcx
xor    %rcx,%rax
movq   %rax,%xmm0
mov    -0x8(%rbp),%rax
movsd  %xmm0,0x28(%rax)
movsd  -0x10(%rbp),%xmm0
call   1040 <cos@plt>
mov    -0x8(%rbp),%rax
movsd  %xmm0,0x40(%rax)
add    $0x10,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<cmatrix_rotx>:
push   %rbx
sub    $0x10,%rsp
movsd  %xmm0,0x8(%rsp)
mov    %rdi,%rbx
movq   $0x0,0x18(%rdi)
movq   $0x0,0x30(%rdi)
movsd  0xeba(%rip),%xmm1
movups %xmm1,(%rdi)
call   1040 <cos@plt>
movsd  %xmm0,0x20(%rbx)
movsd  0x8(%rsp),%xmm0
call   1030 <sin@plt>
movsd  %xmm0,0x38(%rbx)
movq   $0x0,0x10(%rbx)
movsd  0x8(%rsp),%xmm0
call   1030 <sin@plt>
xorps  0xe93(%rip),%xmm0
movlps %xmm0,0x28(%rbx)
movsd  0x8(%rsp),%xmm0
call   1040 <cos@plt>
movsd  %xmm0,0x40(%rbx)
add    $0x10,%rsp
pop    %rbx
ret

LLVM IR (-O0):
define void @cmatrix_rotx(double* %0, double %1) {
%3 = alloca double*
%4 = alloca double
store double* %0, double** %3
store double %1, double* %4
%5 = load double*, double** %3
%6 = getelementptr inbounds double, double* %5, i64 0
store double 1.000000e+00, double* %6
%7 = load double*, double** %3
%8 = getelementptr inbounds double, double* %7, i64 3
store double 0.000000e+00, double* %8
%9 = load double*, double** %3
%10 = getelementptr inbounds double, double* %9, i64 6
store double 0.000000e+00, double* %10
%11 = load double*, double** %3
%12 = getelementptr inbounds double, double* %11, i64 1
store double 0.000000e+00, double* %12
%13 = load double, double* %4
%14 = call double @cos(double %13)
%15 = load double*, double** %3
%16 = getelementptr inbounds double, double* %15, i64 4
store double %14, double* %16
%17 = load double, double* %4
%18 = call double @sin(double %17)
%19 = load double*, double** %3
%20 = getelementptr inbounds double, double* %19, i64 7
store double %18, double* %20
%21 = load double*, double** %3
%22 = getelementptr inbounds double, double* %21, i64 2
store double 0.000000e+00, double* %22
%23 = load double, double* %4
%24 = call double @sin(double %23)
%25 = fneg double %24
%26 = load double*, double** %3
%27 = getelementptr inbounds double, double* %26, i64 5
store double %25, double* %27
%28 = load double, double* %4
%29 = call double @cos(double %28)
%30 = load double*, double** %3
%31 = getelementptr inbounds double, double* %30, i64 8
store double %29, double* %31
ret void
}

LLVM IR (-O2):
define void @cmatrix_rotx(double* nocapture writeonly %0, double %1) {
%3 = getelementptr inbounds double, double* %0, i64 3
store double 0.000000e+00, double* %3
%4 = getelementptr inbounds double, double* %0, i64 6
store double 0.000000e+00, double* %4
%5 = bitcast double* %0 to <2 x double>*
store <2 x double> <double 1.000000e+00, double 0.000000e+00>, <2 x double>* %5
%6 = tail call double @cos(double %1)
%7 = getelementptr inbounds double, double* %0, i64 4
store double %6, double* %7
%8 = tail call double @sin(double %1)
%9 = getelementptr inbounds double, double* %0, i64 7
store double %8, double* %9
%10 = getelementptr inbounds double, double* %0, i64 2
store double 0.000000e+00, double* %10
%11 = tail call double @sin(double %1)
%12 = fneg double %11
%13 = getelementptr inbounds double, double* %0, i64 5
store double %12, double* %13
%14 = tail call double @cos(double %1)
%15 = getelementptr inbounds double, double* %0, i64 8
store double %14, double* %15
ret void
}