cmd/compile: internal compiler error: InvertFlags should never make it to codegen v100 = InvertFlags v123 [1.21 backport]

[gopherbot]

@randall77 requested issue #62469 to be considered for backport to the next 1.21 minor release.

@gopherbot please open a backport issue for 1.21.

[randall77]

This can cause an ICE that can be hard to work around.

[gopherbot]

Change https://go.dev/cl/526521 mentions this issue: [release-branch.go1.21] cmd/compile: absorb InvertFlags into Noov comparisons

[gopherbot]

Closed by merging a15ef1b to release-branch.go1.21.