fix Issue 16317 - Wrong binop evaluation/load order when optimizing

[WalterBright]

This also wound up converting tabs to spaces in mars1.d

[dlang-bot]

Thanks for your pull request, @WalterBright!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	16317	critical	Wrong binop evaluation/load order when optimizing

⚠️⚠️⚠️ Warnings ⚠️⚠️⚠️

• Regression or critical bug fixes should always target the stable branch. Learn more about rebasing to stable or the D release process.

To target stable perform these two steps:

1. Rebase your branch to upstream/stable:

git rebase --onto upstream/stable upstream/master

2. Change the base branch of your PR to stable

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#11684"

[WalterBright]

More heisenbugs, this time in buildkite/dmd/build:

  | Preparing working directory | 3s
  | -- | --
  | Running commands | 0s
  | Print environment | 0s
  | Load CI folder | 0s
  | Merging with the upstream target branch | 2s
  | Setting build variables | 0s
  | Setting build variables | 0s
  | Cloning all core repositories | 11s
  | Building dmd |  
  | ~> dmd/src/bootstrap.sh
  | [boostrap] Downloading compiler http://downloads.dlang.org/releases/2.x/2.088.0/dmd.2.088.0.linux.tar.xz

Note no useful information.