cmd/compile: internal compiler error: 'F': func F, startMem[b1] has different values [1.21 backport]

[gopherbot]

@dr2chase requested issue #61992 to be considered for backport to the next 1.21 minor release.

@gopherbot please open the backport tracking issues. This is a use-blocking compiler bug.

[gopherbot]

Change https://go.dev/cl/520058 mentions this issue: [release-branch.go1.21] cmd/compile: in expandCalls, move all arg marshalling into call block

[cagedmantis]

Approved as this is a serious issue without a workaround.

[gopherbot]

Closed by merging 2b8026f to release-branch.go1.21.