message: Remove comments with register names that might not be right and don't really matter.
diff: @@ -5104,7 +5104,7 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
  self.value_stack.push(ret);
  let tmp_out = self.machine.acquire_temp_gpr().unwrap();
  - let tmp_in = self.machine.acquire_temp_xmm().unwrap(); // xmm2
  + let tmp_in = self.machine.acquire_temp_xmm().unwrap();
  Self::emit_relaxed_binop(
  a,
  @@ -5135,9 +5135,9 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
  if a.arch_has_itruncf() {
  a.arch_emit_i64_trunc_uf32(tmp_in, tmp_out);
  } else {
  - let tmp = m.acquire_temp_gpr().unwrap(); // r15
  - let tmp_x1 = m.acquire_temp_xmm().unwrap(); // xmm1
  - let tmp_x2 = m.acquire_temp_xmm().unwrap(); // xmm3
  + let tmp = m.acquire_temp_gpr().unwrap();
  + let tmp_x1 = m.acquire_temp_xmm().unwrap();
  + let tmp_x2 = m.acquire_temp_xmm().unwrap();
  a.emit_mov(
  Size::S32,
  @@ -5623,7 +5623,7 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
  self.value_stack.push(ret);
  let tmp_out = self.machine.acquire_temp_gpr().unwrap();
  - let tmp_in = self.machine.acquire_temp_xmm().unwrap(); // xmm2
  + let tmp_in = self.machine.acquire_temp_xmm().unwrap();
  Self::emit_relaxed_binop(
  a,
  @@ -5654,9 +5654,9 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
  if a.arch_has_itruncf() {
  a.arch_emit_i64_trunc_uf64(tmp_in, tmp_out);
  } else {
  - let tmp = m.acquire_temp_gpr().unwrap(); // r15
  - let tmp_x1 = m.acquire_temp_xmm().unwrap(); // xmm1
  - let tmp_x2 = m.acquire_temp_xmm().unwrap(); // xmm3
  + let tmp = m.acquire_temp_gpr().unwrap();
  + let tmp_x1 = m.acquire_temp_xmm().unwrap();
  + let tmp_x2 = m.acquire_temp_xmm().unwrap();
  a.emit_mov(
  Size::S64,
  