mir: drop temps outside-in by scheduling the drops inside-out.

[eddyb]

It was backwards all along, but only noticeable with multiple drops in one rvalue scope. Fixes#32433.

[rust-highfive]

r? @arielb1

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[arielb1]

@bors r+

[bors]

📌 Commit d569228 has been approved by arielb1

[Manishearth]

http://buildbot.rust-lang.org/builders/auto-linux-64-opt-mir/builds/513/steps/test/logs/stdio

[eddyb]

Ahh right, I forgot to check it locally as I had two other PRs to work on. And Travis doesn't help with MIR.

[eddyb]

@bors r-

[eddyb]

I went back and checked my testcases from #32433. They're fixed, but the issue-23338-ensure-param-drop-order test still has a different case which MIR gets wrong, 6 needs to be dropped earlier, just after Make D(de_6, 7).

[bors]

☔ The latest upstream changes (presumably #33130) made this pull request unmergeable. Please resolve the merge conflicts.

[eddyb]

@bors r=arielb1

[bors]

📌 Commit e940de6 has been approved by arielb1

[bors]

⌛ Testing commit e940de6 with merge c049541...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-32cross-opt, auto-linux-64-cargotest, auto-linux-64-cross-armhf, auto-linux-64-cross-armsf, auto-linux-64-cross-freebsd, auto-linux-64-cross-netbsd, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-opt-mir, auto-linux-64-opt-rustbuild, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-mac-64-opt-rustbuild, auto-mac-cross-ios-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-32-opt-rustbuild, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-cross-opt, auto-win-msvc-32-opt, auto-win-msvc-64-cargotest, auto-win-msvc-64-opt, auto-win-msvc-64-opt-mir, auto-win-msvc-64-opt-rustbuild